Release 0.35.0

Test bionic

.travis.yml

@@ -1,17 +1,43 @@
 language: c
+sudo: required
 
-addons:
-  postgresql: 9.3
+env:
+  global:
+    - PGUSER=postgres
+    - PGDATABASE=postgres
+    - PGOPTIONS='-c client_min_messages=NOTICE'
+    - PGPORT=5432
 
-before_install:
-  - sudo apt-get update
-  #- sudo apt-get install -q postgresql-9.3-postgis-2.1
-  - sudo apt-get update
-  - sudo apt-get install -q postgresql-server-dev-9.3
-  - sudo apt-get install -q postgresql-plpython-9.3
+jobs:
+  include:
+    - env: POSTGRESQL_VERSION="9.6" POSTGIS_VERSION="2.5"
+      dist: xenial
+    - env: POSTGRESQL_VERSION="10" POSTGIS_VERSION="2.5"
+      dist: xenial
+    - env: POSTGRESQL_VERSION="11" POSTGIS_VERSION="2.5"
+      dist: xenial
+    - env: POSTGRESQL_VERSION="12" POSTGIS_VERSION="2.5"
+      dist: bionic
+    - env: POSTGRESQL_VERSION="12" POSTGIS_VERSION="3"
+      dist: bionic
 
 script:
+  - sudo service postgresql stop;
+  - sudo apt-get remove postgresql* -y
+  - sudo apt-get install -y --allow-unauthenticated --no-install-recommends --no-install-suggests postgresql-$POSTGRESQL_VERSION postgresql-client-$POSTGRESQL_VERSION postgresql-server-dev-$POSTGRESQL_VERSION postgresql-common
+  - if [[ $POSTGRESQL_VERSION == '9.6' ]]; then sudo apt-get install -y postgresql-contrib-9.6; fi;
+  - sudo apt-get install -y --allow-unauthenticated postgresql-$POSTGRESQL_VERSION-postgis-$POSTGIS_VERSION postgresql-$POSTGRESQL_VERSION-postgis-$POSTGIS_VERSION-scripts postgis
+  # For pre12, install plpython2. For PG12 install plpython3
+  - if [[ $POSTGRESQL_VERSION != '12' ]]; then sudo apt-get install -y postgresql-plpython-$POSTGRESQL_VERSION python python-redis; else sudo apt-get install -y postgresql-plpython3-12 python3 python3-redis; fi;
+  - sudo pg_dropcluster --stop $POSTGRESQL_VERSION main
+  - sudo rm -rf /etc/postgresql/$POSTGRESQL_VERSION /var/lib/postgresql/$POSTGRESQL_VERSION
+  - sudo pg_createcluster -u postgres $POSTGRESQL_VERSION main -- --auth-local trust --auth-host password
+  - sudo /etc/init.d/postgresql start $POSTGRESQL_VERSION || sudo journalctl -xe
   - make
   - sudo make install
-  - PGOPTIONS='-c client_min_messages=NOTICE' PGUSER=postgres make installcheck ||
-    { cat regression.diffs; false; }
+  - make installcheck
+
+after_failure:
+  - pg_lsclusters
+  - cat regression.out
+  - cat regression.diffs

CONTRIBUTING.md

@@ -22,13 +22,18 @@ and upgrade of the objects. This means using CREATE OR REPLACE for
 the functions, and whatever it takes to check existence of any previous
 version of objects in other cases.
 
-When used as an extension (probably always from version 0.2.0 onwards)
-all the objects will be installed in a "cartodb" schema. Take this into
-account to fully-qualify internal calls to avoid (possibly dangerous)
-name clashes.
+When adding a new function or modifying an exiting one make sure that the
+[VOLATILITY](https://www.postgresql.org/docs/current/static/xfunc-volatility.html) and [PARALLEL](https://www.postgresql.org/docs/9.6/static/parallel-safety.html) categories are updated accordingly.
+
+
+Although the extension will usually be installed in the "cartodb" schema, please
+use @extschema@  to fully-qualify internal calls to avoid name clashes.
+When you use postgis functions or types, please fully-qualify them by using
+@postgisschema@ (it's changed to "public" by the install script) to avoid
+pg_upgrade issues.
 
 Every new feature (as well as bugfixes) should come with a test case,
-see next section.
+see the 'Writing testcases' section.
 
 Writing testcases
 -----------------
@@ -62,3 +67,7 @@ A useful query:
 ```sql
 SELECT * FROM pg_extension_update_paths('cartodb') WHERE path IS NOT NULL AND source = cdb_version();
 ```
+
+## Submitting Contributions
+
+* You will need to sign a Contributor License Agreement (CLA) before making a submission. [Learn more here](https://carto.com/contributions).

Makefile

@@ -1,9 +1,10 @@
 # cartodb/Makefile
 
 EXTENSION = cartodb
-EXTVERSION = 0.18.2
+EXTVERSION = 0.35.0
 
 SED = sed
+AWK = awk
 
 CDBSCRIPTS = \
   scripts-enabled/*.sql \
@@ -76,6 +77,37 @@ UPGRADABLE = \
   0.18.0 \
   0.18.1 \
   0.18.2 \
+  0.18.3 \
+  0.18.4 \
+  0.18.5 \
+  0.19.0 \
+  0.19.1 \
+  0.19.2 \
+  0.20.0 \
+  0.21.0 \
+  0.22.0 \
+  0.22.1 \
+  0.22.2 \
+  0.23.0 \
+  0.23.1 \
+  0.23.2 \
+  0.24.0 \
+  0.24.1 \
+  0.25.0 \
+  0.26.0 \
+  0.26.1 \
+  0.27.0 \
+  0.27.1 \
+  0.27.2 \
+  0.28.0 \
+  0.28.1 \
+  0.29.0 \
+  0.30.0 \
+  0.31.0 \
+  0.32.0 \
+  0.33.0 \
+  0.34.0 \
+  0.35.0 \
   $(EXTVERSION)dev \
   $(EXTVERSION)next \
   $(END)
@@ -99,18 +131,27 @@ EXTRA_CLEAN = cartodb_version.sql
 DOCS = README.md
 REGRESS_OLD = $(wildcard test/*.sql)
 REGRESS_LEGACY = $(REGRESS_OLD:.sql=)
-REGRESS = test_setup $(REGRESS_LEGACY)
+REGRESS = test/test_setup $(REGRESS_LEGACY)
 
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
 include $(PGXS)
 
-$(EXTENSION)--$(EXTVERSION).sql: $(CDBSCRIPTS) cartodb_version.sql Makefile 
+PG_VERSION := $(shell $(PG_CONFIG) --version | $(AWK) '{split($$2,a,"."); print a[1]}')
+PG_12_GE := $(shell [ $(PG_VERSION) -ge 12 ] && echo true)
+PLPYTHONU := plpythonu
+ifeq ($(PG_12_GE), true)
+PLPYTHONU := plpython3u
+endif
+PGPORT ?= '5432'
+PGUSER ?= 'postgres'
+
+$(EXTENSION)--$(EXTVERSION).sql: $(CDBSCRIPTS) cartodb_version.sql Makefile
 	echo '\echo Use "CREATE EXTENSION $(EXTENSION)" to load this file. \quit' > $@
 	cat $(CDBSCRIPTS) | \
-    $(SED) -e 's/public\./cartodb./g' \
-        -e 's/:DATABASE_USERNAME/cdb_org_admin/g' \
-        -e "s/''public''/''cartodb''/g" >> $@
+	$(SED) 	-e 's/@extschema@/cartodb/g' \
+		-e 's/@postgisschema@/public/g' \
+		-e 's/@@plpythonu@@/$(PLPYTHONU)/g' >> $@
 	echo "GRANT USAGE ON SCHEMA cartodb TO public;" >> $@
 	cat cartodb_version.sql >> $@
 
@@ -124,10 +165,10 @@ $(EXTENSION)--$(EXTVERSION)--$(EXTVERSION)next.sql: $(EXTENSION)--$(EXTVERSION).
 	cp $< $@
 
 $(EXTENSION).control: $(EXTENSION).control.in Makefile
-	$(SED) -e 's/@@VERSION@@/$(EXTVERSION)/' $< > $@
+	$(SED) -e 's/@@VERSION@@/$(EXTVERSION)/g' -e 's/@@plpythonu@@/$(PLPYTHONU)/g' $< > $@
 
 cartodb_version.sql: cartodb_version.sql.in Makefile $(GITDIR)/index
-	$(SED) -e 's/@@VERSION@@/$(EXTVERSION)/' $< > $@
+	$(SED) -e 's/@@VERSION@@/$(EXTVERSION)/' -e 's/@extschema@/cartodb/g' -e "s/@postgisschema@/public/g" -e 's/@@plpythonu@@/$(PLPYTHONU)/g' $< > $@
 
 # Needed for consistent `echo` results with backslashes
 SHELL = bash
@@ -136,19 +177,36 @@ legacy_regress: $(REGRESS_OLD) Makefile
 	mkdir -p sql/test/
 	mkdir -p expected/test/
 	mkdir -p results/test/
+	cat sql/test_setup.sql | \
+			$(SED) -e 's/@@VERSION@@/$(EXTVERSION)/' -e 's/@extschema@/cartodb/g' -e "s/@postgisschema@/public/g" -e 's/@@plpythonu@@/$(PLPYTHONU)/g' \
+			> sql/test/test_setup.sql
+	cp sql/test_setup_expect expected/test/test_setup.out
 	for f in $(REGRESS_OLD); do \
-    tn=`basename $${f} .sql`; \
-    of=sql/test/$${tn}.sql; \
-    echo '\set ECHO none' > $${of}; \
-    echo '\a' >> $${of}; \
-    echo '\t' >> $${of}; \
-    echo '\set QUIET off' >> $${of}; \
-    cat $${f} | \
-      $(SED) -e 's/public\./cartodb./g' >> $${of}; \
-    exp=expected/test/$${tn}.out; \
-    echo '\set ECHO none' > $${exp}; \
-    cat test/$${tn}_expect >> $${exp}; \
-  done
+		tn=`basename $${f} .sql`; \
+		of=sql/test/$${tn}.sql; \
+		echo '\set ECHO none' > $${of}; \
+		echo '\a' >> $${of}; \
+		echo '\t' >> $${of}; \
+		echo '\set QUIET off' >> $${of}; \
+		cat $${f} | \
+			$(SED) 	-e 's/@@VERSION@@/$(EXTVERSION)/' \
+				-e 's/@extschema@/cartodb/g' \
+				-e "s/@postgisschema@/public/g" \
+				-e 's/@@plpythonu@@/$(PLPYTHONU)/g' \
+				-e 's/@@PGPORT@@/$(PGPORT)/g' \
+				-e 's/@@PGUSER@@/$(PGUSER)/g' \
+				>> $${of}; \
+		exp=expected/test/$${tn}.out; \
+		echo '\set ECHO none' > $${exp}; \
+		cat test/$${tn}_expect | \
+			$(SED) 	-e 's/@@VERSION@@/$(EXTVERSION)/' \
+				-e 's/@extschema@/cartodb/g' \
+				-e "s/@postgisschema@/public/g" \
+				-e 's/@@plpythonu@@/$(PLPYTHONU)/g' \
+				-e 's/@@PGPORT@@/$(PGPORT)/g' \
+				-e 's/@@PGUSER@@/$(PGUSER)/g' \
+				>> $${exp}; \
+	done
 
 test_organization:
 	bash test/organization/test.sh
@@ -156,7 +214,15 @@ test_organization:
 test_extension_new:
 	bash test/extension/test.sh
 
-legacy_tests: legacy_regress 
+legacy_tests: legacy_regress $(EXTENSION)--unpackaged--$(EXTVERSION).sql
 
-installcheck: legacy_tests test_extension_new test_organization
+PGREGRESS := $(shell dirname `$(PG_CONFIG) --pgxs`)/../../src/test/regress/pg_regress
+PGBINDIR := $(shell $(PG_CONFIG) --bindir)
+PGREGRESSDATABASE = 'contrib_regression'
+regress: legacy_tests
+	PGUSER=$(PGUSER) \
+	PGPORT=$(PGPORT) \
+	$(PGREGRESS) --inputdir=./ --bindir='$(PGBINDIR)' --dbname=$(PGREGRESSDATABASE) $(REGRESS)
 
+installcheck: test_extension_new test_organization
+	$(MAKE) -C . regress

NEWS.md

@@ -1,3 +1,133 @@
+0.35.0 (2019-12-30)
+* Reapply the changes in 0.33.0 (the issue we were looking for was unrelated)
+* Reapply `Make PG12 depend on plpython3u instead of plpythonu`
+* Fix identifier quotation in `CDB_UserDataSize`
+
+0.34.0 (2019-12-23)
+* Revert changes done in 0.33.0, keeping function signature to drop them
+
+0.33.0 (2019-12-20)
+* Revert `Make PG12 depend on plpython3u instead of plpythonu`.
+* Add functions to manage Federated Tables (Foreign Data Wrapper)
+
+0.32.0 (2019-11-08)
+* Fix oAuth ownership re-assignation for functions
+* Some fixes for PG12.
+* Make PG12 depend on plpython3u instead of plpythonu
+* CDB_UserDataSize is now compatible with postgis 3 without postgis_raster.
+* Makefile: Add regress target (checks regress tests without needing to install the extension)
+
+0.31.0 (2019-10-08)
+* Ghost tables: Add missing tags (#370)
+* Set search_path in security definer functions.
+
+0.30.0 (2019-07-17)
+* Added new admin functions to connect CARTO with user FDW's (#369)
+
+0.29.0 (2019-07-15)
+* Added new function CDB_OAuth:
+  * Install event trigger to check for table/view/sequence/function creation
+  * Reassign the ownership of new objects to a defined role in the cdb_conf
+* Changed MakeFile to support different expects for differents PG versions
+
+0.28.1 (2019-07-04)
+* Avoid temporary tables creation in CDB_SyncTable (#366)
+* Make CDB_Get_Foreign_Updated_At robust to missing CDB_TableMetadata (#362)
+
+0.28.0 (2019-07-01)
+* New function CDB_SyncTable (#355)
+
+0.27.2 (2019-06-21)
+* Improvements and fixes in Ghost tables functions (#360)
+
+0.27.1 (2019-06-03)
+* Add some qualifications that were left in the previous release.
+
+0.27.0 (2019-06-03)
+* Fully qualify function calls
+* Several improvements to bash tests.
+* Avoid dropping publicuser in tests.
+* Raise minimum requirement to PostgreSQL 9.6.
+
+0.26.1 (2019-03-19)
+* Remove default TIS values from Ghost tables functions
+
+0.26.0 (2019-03-11)
+* Use `ST_ShiftLongitude` instead of `ST_Shift_Longitude`.
+* Add Ghost tables functions to install triggers and enqueue the linking process
+
+0.25.0 (2019-02-22)
+* Add `CDB_Username` to get the cartodb username from the current PostgreSQL user
+
+0.24.1 (2019-01-02)
+* Drop functions removed in 0.12 (#341)
+* Travis: Test with PostgreSQL 9.5, 10 and 11.
+
+0.24.0 (2018-09-13)
+* Travis: Test with PostgreSQL 9.5 and 10.
+* _cdb_estimated_extent: Fix bug with ST_EstimatedExtent interaction.
+* Improvements in `CDB_JenksBins`.
+  * Now it ignores NULLs.
+  * No longer puts the same value in multiple categories.
+  * Removes all limits related to size.
+  * If not set, the number of iterations done is based now on the size of the array.
+  * Fixed multiple bugs.
+  * The internal function `CDB_JenksBinsIteration` has changed its signature.
+
+0.23.2 (2018-07-19)
+* Fix `CDB_QueryTablesText` with parenthesized queries (#335)
+
+0.23.1 (2018-07-19)
+* Fix `CDB_EstimateRowCount` parallelizability #333
+
+0.23.0 (2018-07-03)
+* Add a new helper function `_CDB_Table_Exists(table_name_with_optional_schema TEXT)` #332
+
+0.22.2 (2018-05-29)
+* Fix: Fix hyphenates usernames in 0.22.1 fix (#331)
+
+0.22.1 (2018-05-29)
+* Fix: Correctly grant permission to all sequences related with table (#330)
+
+0.22.0 (2018-03-22)
+* Fix: allow older ogr2ogr to work in -append mode (#319,#325)
+* Refactors CDB_QuantileBins to rely on PostgreSQL function `percentile_disc` #316
+
+0.21.0 (2018-02-15)
+* Add optional parameter to limit the number of cells in grid-generation functions #322
+* Fix: grant usage on cartodb_id sequence when sharing read write #323
+* Fix: Change sed in-place for tmpfiles 524319
+
+0.20.0 (2017-11-08)
+* Added VOLATILITY and PARALLEL categories to all functions
+
+0.19.2 (2017-06-30)
+* Improved functions to generate unique identifiers #305
+
+0.19.1 (2017-06-05)
+
+* Fixed a deadlock problem when trying to regenarate overviews #302
+
+0.19.0 (2017-04-11)
+
+* Add new function `CDB_EstimateRowCount` #295
+
+0.18.5 (2016-11-30)
+
+* Add to new overview creation strategies #290
+* Fix tests: race condition with publicuser #157
+* Fix: CDB_Stats divisions by zero #181
+* Better implementation of `CDB_EqualIntervalBins` #244
+* New tests for binning functions #249
+
+0.18.4 (2016-11-04)
+
+* No functional changes; fixes the migration from previous versions #288
+
+0.18.3 (2016-11-03)
+
+* Exclude analysis cache tables from the quota #281
+
 0.18.2 (2016-10-20)
 -------------------
 
@@ -14,8 +144,6 @@
 
 * Fix: exclude NULL geometries when creating Overviews #269
 * Function to check analysis tables limits #279
-* Exclude analysis cache tables from the quota #281
-
 
 0.17.1 (2016-08-16)
 -------------------

README.md

@@ -1,8 +1,7 @@
 cartodb-postgresql
 ==================
 
-[![Build Status](http://api.travis-ci.org/CartoDB/cartodb-postgresql.svg?branch=master)]
-(http://travis-ci.org/CartoDB/cartodb-postgresql)
+[![Build Status](http://api.travis-ci.org/CartoDB/cartodb-postgresql.svg?branch=master)](http://travis-ci.org/CartoDB/cartodb-postgresql)
 
 PostgreSQL extension for CartoDB
 
@@ -11,8 +10,9 @@ See [the cartodb-postgresql wiki](https://github.com/CartoDB/cartodb-postgresql/
 Dependencies
 ------------
 
- * PostgreSQL 9.3+ (with plpythonu extension and xml support)
- * [PostGIS extension](http://postgis.net) 
+ * PostgreSQL 9.6+ (with plpythonu extension and xml support). For PostgreSQL 12+ plpython3u is required instead of plpythonu.
+ * [PostGIS extension](http://postgis.net)
+ * Python with [Redis module](https://pypi.org/project/redis/)
 
 Install
 -------

carto-package.json

@@ -0,0 +1,11 @@
+{
+    "name": "carto_postgresql_ext",
+    "current_version": {
+        "requires": {
+            "postgresql": ">=10.0.0",
+            "postgis": ">=2.4.0.0"
+        },
+        "works_with": {
+        }
+    }
+}

cartodb.control.in

@@ -3,4 +3,4 @@ comment = 'Turn a database into a cartodb user database.'
 superuser = true
 relocatable = false
 schema = cartodb
-requires = 'plpythonu, postgis'
+requires = '@@plpythonu@@, postgis'

cartodb_version.sql.in

@@ -1,6 +1,6 @@
 DO $$ BEGIN IF EXISTS (SELECT * FROM pg_proc p, pg_namespace n WHERE p.proname = 'cdb_transformtowebmercator' AND p.pronamespace = n.oid AND n.nspname = 'public') THEN RAISE EXCEPTION 'Use CREATE EXTENSION cartodb FROM unpackaged'; END IF; END; $$ LANGUAGE 'plpgsql'; -- forbid duplicated extension
 
-CREATE OR REPLACE FUNCTION cartodb.CDB_version()
+CREATE OR REPLACE FUNCTION @extschema@.CDB_version()
 RETURNS text AS $$
   SELECT '@@VERSION@@'::text;
 $$ language 'sql' IMMUTABLE STRICT;

doc/CDB_EstimateRowCount.md

@@ -0,0 +1,25 @@
+Estimate the number of rows of a query.
+
+
+#### Using the function
+
+```sql
+SELECT CDB_EstimateRowCount($$
+  UPDATE addresses SET the_geom = cdb_geocode_street_point(addr, city, state, 'US');
+$$) AS row_count;
+```
+
+Result:
+
+```
+ row_count
+-----------
+         5
+(1 row)
+```
+
+#### Arguments
+
+CDB_EstimateRowCount(query)
+
+* **query** text: the SQL query to estimate the row count for.

doc/CDB_SyncTable.md

@@ -0,0 +1,56 @@
+Synchronize two tables. This function will synchronize a *destination* table with a *source* table.
+The idea is that the *destination* is a replica of *source* and *source* has been subject to
+modifications that are to be applied to *destination*.
+
+This will be achieved by deleting the rows in the destination not present
+in the source, inserting rows of the source not in the destination and updating modified rows.
+If the destination table does not exist it will be created and all the rows of the source inserted into it.
+
+Both tables must have a consistent `cartodb_id` primary key column which will be used to match
+the source and destination rows.
+
+Note that both tables do not necessarily become identical after the synchronization, since additional columns
+may have been added to the destination; those columns will not be altered by the synchronization.
+
+In addition some source columns may be skipped by listing them in the optional last argument; such columns
+will not be updated in the destination, so if they are present in it their values won't be altered.
+
+
+#### Using the function
+
+Import some data using COPY FROM into a temporary table, then synchronize a table with the data and
+finally delete the temporary table. This could be used import and update some data periodically while
+allowing to add columns to the data that will be preserved across updates.
+
+```sql
+CREATE tmp_pois(cartodb_id int, name text, type text, longitude double precision, latitude double precision, rank int);
+COPY tmp_pois FROM '/tmp/pois.csv';
+SELECT CDB_SyncTable('tmp_pois', 'public', 'pois');
+DROP TABLE tmp_pois;
+```
+
+Now we could perform some changes to the `pois` to maintain our own ranking:
+
+```sql
+UPDATE pois SET rank = random()*4 + 1;
+```
+
+Then, if the source were updated at `/tmp/pois.csv` we could synchronize with it while preserving our `rank` values with:
+
+```sql
+CREATE tmp_pois(cartodb_id int, name text, type text, longitude double precision, latitude double precision, rank int);
+COPY tmp_pois FROM '/tmp/pois.csv';
+SELECT CDB_SyncTable('tmp_pois', 'public', 'pois', '{rank}');
+DROP TABLE tmp_pois;
+```
+
+#### Arguments
+
+```
+CDB_SyncTable(src_table, dst_schema, dst_table, skip_cols)
+```
+
+* **src_table** REGCLASS the source data for the synchronization
+* **dst_scgena** REGNAMESPACE the destination schema
+* **dst_table** NAME the destination table to be updated
+* **skip_cols** NAME[] an array of column names, empty by default, which will be skipped

expected/test_setup.out

@@ -1,6 +1,5 @@
-CREATE EXTENSION postgis;
-CREATE EXTENSION plpythonu;
-CREATE EXTENSION cartodb;
+SET client_min_messages TO error;
+CREATE EXTENSION cartodb CASCADE;
 CREATE FUNCTION public.cdb_invalidate_varnish(table_name text)
 RETURNS void AS $$
 BEGIN

scripts-available/CDB_AnalysisCatalog.sql

@@ -1,6 +1,6 @@
 -- Table to register analysis nodes from https://github.com/cartodb/camshaft
 CREATE TABLE IF NOT EXISTS
-cartodb.cdb_analysis_catalog (
+@extschema@.cdb_analysis_catalog (
     -- md5 hex hash
     node_id char(40) CONSTRAINT cdb_analysis_catalog_pkey PRIMARY KEY,
     -- being json allows to do queries like analysis_def->>'type' = 'buffer'
@@ -34,7 +34,7 @@ cartodb.cdb_analysis_catalog (
 -- This can only be called from an SQL script executed by CREATE EXTENSION
 DO LANGUAGE 'plpgsql' $$
 BEGIN
-    PERFORM pg_catalog.pg_extension_config_dump('cartodb.cdb_analysis_catalog', '');
+    PERFORM pg_catalog.pg_extension_config_dump('@extschema@.cdb_analysis_catalog', '');
 END
 $$;
 
@@ -45,7 +45,7 @@ $$;
 DO $$
     BEGIN
         BEGIN
-            ALTER TABLE cartodb.cdb_analysis_catalog ADD COLUMN last_modified_by uuid;
+            ALTER TABLE @extschema@.cdb_analysis_catalog ADD COLUMN last_modified_by uuid;
         EXCEPTION
             WHEN duplicate_column THEN END;
     END;
@@ -54,7 +54,7 @@ $$;
 DO $$
     BEGIN
         BEGIN
-            ALTER TABLE cartodb.cdb_analysis_catalog ADD COLUMN last_error_message text;
+            ALTER TABLE @extschema@.cdb_analysis_catalog ADD COLUMN last_error_message text;
         EXCEPTION
             WHEN duplicate_column THEN END;
     END;
@@ -63,7 +63,7 @@ $$;
 DO $$
     BEGIN
         BEGIN
-            ALTER TABLE cartodb.cdb_analysis_catalog ADD COLUMN cache_tables regclass[] NOT NULL DEFAULT '{}';
+            ALTER TABLE @extschema@.cdb_analysis_catalog ADD COLUMN cache_tables regclass[] NOT NULL DEFAULT '{}';
         EXCEPTION
             WHEN duplicate_column THEN END;
     END;
@@ -72,7 +72,7 @@ $$;
 DO $$
     BEGIN
         BEGIN
-            ALTER TABLE cartodb.cdb_analysis_catalog ADD COLUMN username text;
+            ALTER TABLE @extschema@.cdb_analysis_catalog ADD COLUMN username text;
         EXCEPTION
             WHEN duplicate_column THEN END;
     END;
@@ -84,12 +84,12 @@ DO LANGUAGE 'plpgsql' $$
     DECLARE
         column_index int;
     BEGIN
-        SELECT ordinal_position FROM information_schema.columns WHERE table_name='cdb_analysis_catalog' AND table_schema='cartodb' AND column_name='username' INTO column_index;
+        SELECT ordinal_position FROM information_schema.columns WHERE table_name='cdb_analysis_catalog' AND table_schema='@extschema@' AND column_name='username' INTO column_index;
         IF column_index = 1 OR column_index = 10 THEN
-           ALTER TABLE cartodb.cdb_analysis_catalog ADD COLUMN username_final text;
-           UPDATE cartodb.cdb_analysis_catalog SET username_final = username;
-           ALTER TABLE cartodb.cdb_analysis_catalog DROP COLUMN username;
-           ALTER TABLE cartodb.cdb_analysis_catalog RENAME COLUMN username_final TO username;
+           ALTER TABLE @extschema@.cdb_analysis_catalog ADD COLUMN username_final text;
+           UPDATE @extschema@.cdb_analysis_catalog SET username_final = username;
+           ALTER TABLE @extschema@.cdb_analysis_catalog DROP COLUMN username;
+           ALTER TABLE @extschema@.cdb_analysis_catalog RENAME COLUMN username_final TO username;
         END IF;
     END;
 $$;

scripts-available/CDB_AnalysisCheck.sql

@@ -1,24 +1,27 @@
 -- Read configuration parameter analysis_quota_factor, making it
 -- accessible to regular users (which don't have access to cdb_conf)
-CREATE OR REPLACE FUNCTION _CDB_GetConfAnalysisQuotaFactor()
+CREATE OR REPLACE FUNCTION @extschema@._CDB_GetConfAnalysisQuotaFactor()
 RETURNS float8 AS
 $$
 BEGIN
-  RETURN CDB_Conf_GetConf('analysis_quota_factor')::text::float8;
+  RETURN @extschema@.CDB_Conf_GetConf('analysis_quota_factor')::text::float8;
 END;
-$$
-LANGUAGE 'plpgsql' STABLE SECURITY DEFINER;
+$$  LANGUAGE 'plpgsql'
+    STABLE
+    PARALLEL SAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
 
 
 -- Get the factor (fraction of the quota) for Camshaft cached analysis tables
-CREATE OR REPLACE FUNCTION _CDB_AnalysisQuotaFactor()
+CREATE OR REPLACE FUNCTION @extschema@._CDB_AnalysisQuotaFactor()
 RETURNS float8 AS
 $$
 DECLARE
   factor float8;
 BEGIN
   -- We use a floating point cdb_conf parameter
-  factor := _CDB_GetConfAnalysisQuotaFactor();
+  factor := @extschema@._CDB_GetConfAnalysisQuotaFactor();
   -- With a default value
   IF factor IS NULL THEN
     factor := 2;
@@ -26,14 +29,14 @@ BEGIN
   RETURN factor;
 END;
 $$
-LANGUAGE 'plpgsql' STABLE;
+LANGUAGE 'plpgsql' STABLE PARALLEL SAFE;
 
 -- This checks the space used up by Camshaft cached analysis tables.
 -- An exception will be raised if the limits are exceeded.
 -- The name of an analysis table is passed; this, in addition to the
 -- db role that executes this function is used to determined which
 -- analysis tables will be considered.
-CREATE OR REPLACE FUNCTION CDB_CheckAnalysisQuota(table_name TEXT)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_CheckAnalysisQuota(table_name TEXT)
 RETURNS void AS
 $$
 DECLARE
@@ -54,9 +57,9 @@ BEGIN
 
   SELECT current_schema() INTO schema_name;
   EXECUTE FORMAT('SELECT %I._CDB_UserQuotaInBytes();', schema_name) INTO nominal_quota;
-  IF nominal_quota*_CDB_AnalysisQuotaFactor() < _CDB_AnalysisDataSize(schema_name) THEN
+  IF nominal_quota * @extschema@._CDB_AnalysisQuotaFactor() < @extschema@._CDB_AnalysisDataSize(schema_name) THEN
     -- The limit is defined by a factor applied to the total space quota for the user
     RAISE EXCEPTION 'Analysis cache space limits exceeded';
   END IF;
 END;
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;

scripts-available/CDB_AnalysisSupport.sql

@@ -2,48 +2,48 @@
 
 -- This function returns TRUE if a given table name corresponds to a Camshaft cached analysis table
 -- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_IsAnalysisTableName(table_name TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_IsAnalysisTableName(table_name TEXT)
 RETURNS BOOLEAN
 AS $$
   BEGIN
     RETURN table_name SIMILAR TO '\Aanalysis_[0-9a-f]{10}_[0-9a-f]{40}\Z';
   END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 
 -- This function returns a relation of Camshaft cached analysis tables in the given schema.
 -- If the schema name parameter is NULL, then tables from all schemas
 -- that may contain user tables are returned.
 -- For each table, the regclass, schema name and table name are returned.
 -- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_AnalysisTablesInSchema(schema_name text DEFAULT NULL)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_AnalysisTablesInSchema(schema_name text DEFAULT NULL)
 RETURNS TABLE(table_regclass REGCLASS, schema_name TEXT, table_name TEXT)
 AS $$
-  SELECT * FROM _CDB_UserTablesInSchema(schema_name) WHERE _CDB_IsAnalysisTableName(table_name);
-$$ LANGUAGE 'sql';
+  SELECT * FROM @extschema@._CDB_UserTablesInSchema(schema_name) WHERE @extschema@._CDB_IsAnalysisTableName(table_name);
+$$ LANGUAGE 'sql' STABLE PARALLEL SAFE;
 
 -- This function returns a relation user tables excluding analysis tables
 -- If the schema name parameter is NULL, then tables from all schemas
 -- that may contain user tables are returned.
 -- For each table, the regclass, schema name and table name are returned.
 -- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_NonAnalysisTablesInSchema(schema_name text DEFAULT NULL)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_NonAnalysisTablesInSchema(schema_name text DEFAULT NULL)
 RETURNS TABLE(table_regclass REGCLASS, schema_name TEXT, table_name TEXT)
 AS $$
-  SELECT * FROM _CDB_UserTablesInSchema(schema_name) WHERE Not _CDB_IsAnalysisTableName(table_name);
-$$ LANGUAGE 'sql';
+  SELECT * FROM @extschema@._CDB_UserTablesInSchema(schema_name) WHERE Not @extschema@._CDB_IsAnalysisTableName(table_name);
+$$ LANGUAGE 'sql' STABLE PARALLEL SAFE;
 
 -- Total spaced used up by Camshaft cached analysis tables in the given schema.
 -- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_AnalysisDataSize(schema_name TEXT DEFAULT NULL)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_AnalysisDataSize(schema_name TEXT DEFAULT NULL)
 RETURNS bigint AS
 $$
 DECLARE
   total_size bigint;
 BEGIN
   WITH analysis_tables AS (
-    SELECT t.schema_name, t.table_name FROM _CDB_AnalysisTablesInSchema(schema_name) t
+    SELECT t.schema_name, t.table_name FROM @extschema@._CDB_AnalysisTablesInSchema(schema_name) t
   )
-  SELECT COALESCE(INT8(SUM(_CDB_total_relation_size(analysis_tables.schema_name, analysis_tables.table_name))))::int8
+  SELECT COALESCE(INT8(SUM(@extschema@._CDB_total_relation_size(analysis_tables.schema_name, analysis_tables.table_name))))::int8
     INTO total_size FROM analysis_tables;
   IF total_size IS NOT NULL THEN
     RETURN total_size;
@@ -52,4 +52,4 @@ BEGIN
   END IF;
 END;
 $$
-LANGUAGE 'plpgsql' VOLATILE;
+LANGUAGE 'plpgsql' VOLATILE PARALLEL UNSAFE;

scripts-available/CDB_CartodbfyTable.sql

@@ -9,13 +9,13 @@
 
 -- 1) Required checks before running cartodbfication
 -- Either will pass silenty or raise an exception
-CREATE OR REPLACE FUNCTION _CDB_check_prerequisites(schema_name TEXT, reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_check_prerequisites(schema_name TEXT, reloid REGCLASS)
 RETURNS void
 AS $$
 DECLARE
   sql TEXT;
 BEGIN
-  IF cartodb.schema_exists(schema_name) = false THEN
+  IF @extschema@.schema_exists(schema_name) = false THEN
     RAISE EXCEPTION 'Invalid schema name "%"', schema_name;
   END IF;
 
@@ -26,10 +26,10 @@ BEGIN
       RAISE EXCEPTION 'Please set user quota before cartodbfying tables.';
   END;
 END;
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Drop cartodb triggers (might prevent changing columns)
-CREATE OR REPLACE FUNCTION _CDB_drop_triggers(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_drop_triggers(reloid REGCLASS)
   RETURNS void
 AS $$
 DECLARE
@@ -49,11 +49,11 @@ BEGIN
   sql := Format('DROP TRIGGER IF EXISTS test_quota_per_row ON %s', reloid::text);
   EXECUTE sql;
 END;
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 
 -- Cartodb_id creation & validation or renaming if invalid
-CREATE OR REPLACE FUNCTION _CDB_create_cartodb_id_column(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_create_cartodb_id_column(reloid REGCLASS)
   RETURNS void
 AS $$
 DECLARE
@@ -195,12 +195,12 @@ BEGIN
   END;
 
 END;
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 
 -- Create all triggers
 -- NOTE: drop/create has the side-effect of re-enabling disabled triggers
-CREATE OR REPLACE FUNCTION _CDB_create_triggers(schema_name TEXT, reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_create_triggers(schema_name TEXT, reloid REGCLASS)
 RETURNS void
 AS $$
 DECLARE
@@ -209,37 +209,37 @@ BEGIN
 -- "track_updates"
   sql := 'CREATE trigger track_updates AFTER INSERT OR UPDATE OR DELETE OR TRUNCATE ON '
          || reloid::text
-         || ' FOR EACH STATEMENT EXECUTE PROCEDURE public.cdb_tablemetadata_trigger()';
+         || ' FOR EACH STATEMENT EXECUTE PROCEDURE @extschema@.cdb_tablemetadata_trigger()';
   EXECUTE sql;
 
 -- "update_the_geom_webmercator"
 -- TODO: why _before_ and not after ?
   sql := 'CREATE trigger update_the_geom_webmercator_trigger BEFORE INSERT OR UPDATE OF the_geom ON '
          || reloid::text
-         || ' FOR EACH ROW EXECUTE PROCEDURE public._CDB_update_the_geom_webmercator()';
+         || ' FOR EACH ROW EXECUTE PROCEDURE @extschema@._CDB_update_the_geom_webmercator()';
   EXECUTE sql;
 
 -- "test_quota" and "test_quota_per_row"
 
   sql := 'CREATE TRIGGER test_quota BEFORE UPDATE OR INSERT ON '
          || reloid::text
-         || ' EXECUTE PROCEDURE public.CDB_CheckQuota(0.1, ''-1'', '''
+         || ' EXECUTE PROCEDURE @extschema@.CDB_CheckQuota(0.1, ''-1'', '''
          || schema_name::text
          || ''')';
   EXECUTE sql;
 
   sql := 'CREATE TRIGGER test_quota_per_row BEFORE UPDATE OR INSERT ON '
          || reloid::text
-         || ' FOR EACH ROW EXECUTE PROCEDURE public.CDB_CheckQuota(0.001, ''-1'', '''
+         || ' FOR EACH ROW EXECUTE PROCEDURE @extschema@.CDB_CheckQuota(0.001, ''-1'', '''
          || schema_name::text
          || ''')';
   EXECUTE sql;
 END;
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- 8.b) Create all raster triggers
 -- NOTE: drop/create has the side-effect of re-enabling disabled triggers
-CREATE OR REPLACE FUNCTION _CDB_create_raster_triggers(schema_name TEXT, reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_create_raster_triggers(schema_name TEXT, reloid REGCLASS)
   RETURNS void
 AS $$
 DECLARE
@@ -248,43 +248,43 @@ BEGIN
 -- "track_updates"
   sql := 'CREATE trigger track_updates AFTER INSERT OR UPDATE OR DELETE OR TRUNCATE ON '
          || reloid::text
-         || ' FOR EACH STATEMENT EXECUTE PROCEDURE public.cdb_tablemetadata_trigger()';
+         || ' FOR EACH STATEMENT EXECUTE PROCEDURE @extschema@.cdb_tablemetadata_trigger()';
   EXECUTE sql;
 
 -- "test_quota" and "test_quota_per_row"
 
   sql := 'CREATE TRIGGER test_quota BEFORE UPDATE OR INSERT ON '
          || reloid::text
-         || ' EXECUTE PROCEDURE public.CDB_CheckQuota(1, ''-1'', '''
+         || ' EXECUTE PROCEDURE @extschema@.CDB_CheckQuota(1, ''-1'', '''
          || schema_name::text
          || ''')';
   EXECUTE sql;
 
   sql := 'CREATE TRIGGER test_quota_per_row BEFORE UPDATE OR INSERT ON '
          || reloid::text
-         || ' FOR EACH ROW EXECUTE PROCEDURE public.CDB_CheckQuota(0.001, ''-1'', '''
+         || ' FOR EACH ROW EXECUTE PROCEDURE @extschema@.CDB_CheckQuota(0.001, ''-1'', '''
          || schema_name::text
          || ''')';
   EXECUTE sql;
 END;
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 
 
 -- Update the_geom_webmercator
-CREATE OR REPLACE FUNCTION _CDB_update_the_geom_webmercator()
+CREATE OR REPLACE FUNCTION @extschema@._CDB_update_the_geom_webmercator()
   RETURNS trigger
 AS $$
 BEGIN
-  NEW.the_geom_webmercator := public.CDB_TransformToWebmercator(NEW.the_geom);
+  NEW.the_geom_webmercator := @extschema@.CDB_TransformToWebmercator(NEW.the_geom);
   RETURN NEW;
 END;
-$$ LANGUAGE plpgsql VOLATILE;
+$$ LANGUAGE plpgsql VOLATILE PARALLEL UNSAFE;
 
 --- Trigger to update the updated_at column. No longer added by default
 --- but kept here for compatibility with old tables which still have this behavior
 --- and have it added
-CREATE OR REPLACE FUNCTION _CDB_update_updated_at()
+CREATE OR REPLACE FUNCTION @extschema@._CDB_update_updated_at()
   RETURNS TRIGGER AS $$
 BEGIN
    NEW.updated_at := now();
@@ -293,7 +293,7 @@ END;
 $$ LANGUAGE plpgsql VOLATILE;
 
 -- Auxiliary function
-CREATE OR REPLACE FUNCTION cartodb._CDB_is_raster_table(schema_name TEXT, reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_is_raster_table(schema_name TEXT, reloid REGCLASS)
   RETURNS BOOLEAN
 AS $$
 DECLARE
@@ -301,7 +301,7 @@ DECLARE
   is_raster BOOLEAN;
   rel_name TEXT;
 BEGIN
-  IF cartodb.schema_exists(schema_name) = FALSE THEN
+  IF @extschema@.schema_exists(schema_name) = FALSE THEN
     RAISE EXCEPTION 'Invalid schema name "%"', schema_name;
   END IF;
 
@@ -322,7 +322,7 @@ BEGIN
 
   RETURN is_raster;
 END;
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL STABLE PARALLEL UNSAFE;
 
 
 
@@ -331,11 +331,11 @@ $$ LANGUAGE PLPGSQL;
 -- Ensure a table is a "cartodb" table (See https://github.com/CartoDB/cartodb/wiki/CartoDB-user-table)
 
 DROP FUNCTION IF EXISTS CDB_CartodbfyTable(reloid REGCLASS);
-CREATE OR REPLACE FUNCTION CDB_CartodbfyTable(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_CartodbfyTable(reloid REGCLASS)
 RETURNS REGCLASS
 AS $$
 BEGIN
-  RETURN cartodb.CDB_CartodbfyTable('public', reloid);
+  RETURN @extschema@.CDB_CartodbfyTable('public', reloid);
 END;
 $$ LANGUAGE PLPGSQL;
 
@@ -347,7 +347,7 @@ $$ LANGUAGE PLPGSQL;
 -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
 --
 --  CDB_CartodbfyTable(destschema TEXT, reloid REGCLASS)
---    
+--
 --     Main function, calls the following functions, with a little
 --     logic before the table re-write to avoid re-writing if the table
 --     already has all the necessary columns in place.
@@ -388,7 +388,7 @@ $$ LANGUAGE PLPGSQL;
 -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
 
 
-CREATE OR REPLACE FUNCTION _CDB_Columns(OUT pkey TEXT, OUT geomcol TEXT, OUT mercgeomcol TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Columns(OUT pkey TEXT, OUT geomcol TEXT, OUT mercgeomcol TEXT)
 RETURNS record
 AS $$
 BEGIN
@@ -398,10 +398,10 @@ geomcol := 'the_geom';
 mercgeomcol := 'the_geom_webmercator';
 
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' IMMUTABLE PARALLEL SAFE;
 
 
-CREATE OR REPLACE FUNCTION _CDB_Error(message TEXT, funcname TEXT DEFAULT '_CDB_Error')
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Error(message TEXT, funcname TEXT DEFAULT '_CDB_Error')
 RETURNS void
 AS $$
 BEGIN
@@ -409,10 +409,10 @@ BEGIN
   RAISE EXCEPTION 'CDB(%): %', funcname, message;
 
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' VOLATILE PARALLEL SAFE;
 
 
-CREATE OR REPLACE FUNCTION _CDB_SQL(sql TEXT, funcname TEXT DEFAULT '_CDB_SQL')
+CREATE OR REPLACE FUNCTION @extschema@._CDB_SQL(sql TEXT, funcname TEXT DEFAULT '_CDB_SQL')
 RETURNS void
 AS $$
 BEGIN
@@ -425,14 +425,14 @@ BEGIN
     RAISE EXCEPTION 'CDB(%:%:%): %', funcname, SQLSTATE, SQLERRM, sql;
 
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' VOLATILE PARALLEL UNSAFE;
 
 
 -- DEPRECATED: Use _CDB_Unique_Identifier since it's UTF8 Safe and length
 -- aware. Find a unique relation name in the given schema, starting from the
 -- template given. If the template is already unique, just return it;
 -- otherwise, append an increasing integer until you find a unique variant.
-CREATE OR REPLACE FUNCTION _CDB_Unique_Relation_Name(schemaname TEXT, relationname TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Unique_Relation_Name(schemaname TEXT, relationname TEXT)
 RETURNS TEXT
 AS $$
 DECLARE
@@ -444,14 +444,14 @@ BEGIN
   RAISE EXCEPTION '_CDB_Unique_Relation_Name is DEPRECATED. Use _CDB_Unique_Identifier(prefix TEXT, relname TEXT, suffix TEXT, schema TEXT DEFAULT NULL)';
 
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' VOLATILE PARALLEL SAFE;
 
 
 -- DEPRECATED: Use _CDB_Unique_Column_Identifier since it's UTF8 Safe and length
 -- aware. Find a unique column name in the given relation, starting from the
 -- column name given. If the column name is already unique, just return it;
 -- otherwise, append an increasing integer until you find a unique variant.
-CREATE OR REPLACE FUNCTION _CDB_Unique_Column_Name(reloid REGCLASS, columnname TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Unique_Column_Name(reloid REGCLASS, columnname TEXT)
 RETURNS TEXT
 AS $$
 DECLARE
@@ -463,15 +463,15 @@ BEGIN
   RAISE EXCEPTION '_CDB_Unique_Column_Name is DEPRECATED. Use _CDB_Unique_Column_Identifier(prefix TEXT, relname TEXT, suffix TEXT, reloid REGCLASS DEFAULT NULL)';
 
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' VOLATILE PARALLEL SAFE;
 
 
 -- Find out if the table already has a usable primary key
 -- If the table has both a usable key and usable geometry
--- we can no-op on the table copy and just ensure that the 
+-- we can no-op on the table copy and just ensure that the
 -- indexes and triggers are in place
 DROP FUNCTION IF EXISTS _CDB_Has_Usable_Primary_ID(reloid REGCLASS);
-CREATE OR REPLACE FUNCTION _CDB_Has_Usable_Primary_ID(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Has_Usable_Primary_ID(reloid REGCLASS)
   RETURNS BOOLEAN
 AS $$
 DECLARE
@@ -485,7 +485,7 @@ BEGIN
   RAISE DEBUG 'CDB(_CDB_Has_Usable_Primary_ID): %', 'entered function';
 
   -- Read in the names of the CartoDB columns
-  const := _CDB_Columns();
+  const := @extschema@._CDB_Columns();
 
   -- Do we already have a properly named column?
   SELECT a.attname, i.indisprimary, i.indisunique, a.attnotnull, a.atttypid
@@ -537,8 +537,8 @@ BEGIN
 
       -- Clean up test constraint
       IF useable_key THEN
-        PERFORM _CDB_SQL(Format('ALTER TABLE %s DROP CONSTRAINT %s_pk', reloid::text, const.pkey));
-        PERFORM _CDB_SQL(Format('ALTER TABLE %s DROP CONSTRAINT %s_integer', reloid::text, const.pkey));
+        PERFORM @extschema@._CDB_SQL(Format('ALTER TABLE %s DROP CONSTRAINT %s_pk', reloid::text, const.pkey));
+        PERFORM @extschema@._CDB_SQL(Format('ALTER TABLE %s DROP CONSTRAINT %s_integer', reloid::text, const.pkey));
 
       -- Move non-valid column out of the way
       ELSE
@@ -546,7 +546,7 @@ BEGIN
         RAISE DEBUG 'CDB(_CDB_Has_Usable_Primary_ID): %',
           Format('found non-valid ''%s''', const.pkey);
 
-        PERFORM _CDB_Error(sql, Format('_CDB_Has_Usable_Primary_ID: Error: invalid cartodb_id, %s', const.pkey));
+        PERFORM @extschema@._CDB_Error(sql, Format('_CDB_Has_Usable_Primary_ID: Error: invalid cartodb_id, %s', const.pkey));
 
       END IF;
 
@@ -560,7 +560,7 @@ BEGIN
     -- Is there another integer suitable primary key already?
     SELECT a.attname
     INTO rec
-    FROM pg_class c 
+    FROM pg_class c
     JOIN pg_attribute a ON a.attrelid = c.oid
     JOIN pg_type t ON a.atttypid = t.oid
     LEFT JOIN pg_index i ON c.oid = i.indrelid AND a.attnum = ANY(i.indkey)
@@ -569,7 +569,7 @@ BEGIN
 
     -- Yes! Ok, rename it.
     IF FOUND THEN
-      PERFORM _CDB_SQL(Format('ALTER TABLE %s RENAME COLUMN %s TO %s', reloid::text, rec.attname, const.pkey),'_CDB_Has_Usable_Primary_ID');
+      PERFORM @extschema@._CDB_SQL(Format('ALTER TABLE %s RENAME COLUMN %s TO %s', reloid::text, rec.attname, const.pkey),'_CDB_Has_Usable_Primary_ID');
       RETURN true;
     ELSE
       RAISE DEBUG 'CDB(_CDB_Has_Usable_Primary_ID): %',
@@ -583,10 +583,10 @@ BEGIN
   -- Didn't find re-usable key, so return FALSE
   RETURN false;
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' VOLATILE PARALLEL UNSAFE;
 
 
-CREATE OR REPLACE FUNCTION _CDB_Has_Usable_PK_Sequence(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Has_Usable_PK_Sequence(reloid REGCLASS)
 RETURNS BOOLEAN
 AS $$
 DECLARE
@@ -595,7 +595,7 @@ DECLARE
   has_sequence BOOLEAN = false;
 BEGIN
 
-  const := _CDB_Columns();
+  const := @extschema@._CDB_Columns();
 
   SELECT pg_get_serial_sequence(reloid::text, const.pkey)
   INTO STRICT seq;
@@ -603,23 +603,23 @@ BEGIN
 
   RETURN has_sequence;
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' STABLE PARALLEL SAFE;
 
 -- Return a set of columns that can be candidates to be the_geom[webmercator]
 -- with some extra information to analyze them.
-CREATE OR REPLACE FUNCTION _cdb_geom_candidate_columns(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._cdb_geom_candidate_columns(reloid REGCLASS)
 RETURNS TABLE (attname name, srid integer, typname name, desired_attname text, desired_srid integer)
 AS $$
 DECLARE
   const RECORD;
 BEGIN
 
-  const := _CDB_Columns();
+  const := @extschema@._CDB_Columns();
 
   RETURN QUERY
     SELECT
     a.attname,
-    CASE WHEN t.typname = 'geometry' THEN postgis_typmod_srid(a.atttypmod) ELSE NULL END AS srid,
+    CASE WHEN t.typname = 'geometry' THEN @postgisschema@.postgis_typmod_srid(a.atttypmod) ELSE NULL END AS srid,
     t.typname,
     f.desired_attname, f.desired_srid
     FROM pg_class c
@@ -629,15 +629,16 @@ BEGIN
     WHERE c.oid = reloid
     AND a.attnum > 0
     AND NOT a.attisdropped
-    AND postgis_typmod_srid(a.atttypmod) IN (4326, 3857, 0)
+    AND @postgisschema@.postgis_typmod_srid(a.atttypmod) IN (4326, 3857, 0)
     ORDER BY t.oid ASC;
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' STABLE PARALLEL SAFE;
 
 DO $$
 BEGIN
+  SET search_path TO @extschema@;
   IF NOT EXISTS (SELECT 1 FROM pg_type WHERE typname = '_cdb_has_usable_geom_record') THEN
-    CREATE TYPE _cdb_has_usable_geom_record
+    CREATE TYPE @extschema@._cdb_has_usable_geom_record
       AS (has_usable_geoms boolean,
         text_geom_column boolean,
         text_geom_column_name text,
@@ -650,8 +651,8 @@ BEGIN
 END$$;
 
 DROP FUNCTION IF EXISTS _CDB_Has_Usable_Geom(REGCLASS);
-CREATE OR REPLACE FUNCTION _CDB_Has_Usable_Geom(reloid REGCLASS)
-RETURNS _cdb_has_usable_geom_record
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Has_Usable_Geom(reloid REGCLASS)
+RETURNS @extschema@._cdb_has_usable_geom_record
 AS $$
 DECLARE
   r1 RECORD;
@@ -659,12 +660,12 @@ DECLARE
   rv RECORD;
 
   const RECORD;
-  
+
   has_geom BOOLEAN := false;
   has_mercgeom BOOLEAN := false;
   has_geom_name TEXT;
   has_mercgeom_name TEXT;
-  
+
   -- In case 'the_geom' is a text column
   text_geom_column BOOLEAN := false;
   text_geom_column_name TEXT := '';
@@ -679,25 +680,25 @@ BEGIN
   RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', 'entered function';
 
   -- Read in the names of the CartoDB columns
-  const := _CDB_Columns();
+  const := @extschema@._CDB_Columns();
 
   -- Do we have a column we can use?
   FOR r1 IN
-    SELECT * FROM _cdb_geom_candidate_columns(reloid)
+    SELECT * FROM @extschema@._cdb_geom_candidate_columns(reloid)
   LOOP
-  
+
     RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', Format('checking column ''%s''', r1.attname);
 
     -- Name collision: right name (the_geom, the_geomwebmercator?)  but wrong type...
     IF r1.typname != 'geometry' AND r1.attname = r1.desired_attname THEN
-    
+
       -- Maybe it's a geometry column hiding in a text column?
       IF r1.typname IN ('text','varchar','char') THEN
 
         RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', Format('column ''%s'' is a text column', r1.attname);
 
         BEGIN
-          sql := Format('SELECT Max(ST_SRID(%I::geometry)) AS srid FROM %I', r1.attname, reloid::text);
+          sql := Format('SELECT Max(@postgisschema@.ST_SRID(%I::@postgisschema@.geometry)) AS srid FROM %I', r1.attname, reloid::text);
           EXECUTE sql INTO srid;
           -- This gets skipped if EXCEPTION happens
           -- Let the table writer know we need to convert from text
@@ -710,14 +711,14 @@ BEGIN
           END IF;
         -- Nope, the text in the column can't be converted into geometry
         -- so rename it out of the way
-        EXCEPTION 
+        EXCEPTION
           WHEN others THEN
             IF SQLERRM = 'parse error - invalid geometry' THEN
               text_geom_column := false;
-              str := cartodb._CDB_Unique_Column_Identifier(NULL, r1.attname, NULL, reloid);
+              str := @extschema@._CDB_Unique_Column_Identifier(NULL, r1.attname, NULL, reloid);
               sql := Format('ALTER TABLE %s RENAME COLUMN %s TO %I', reloid::text, r1.attname, str);
-              PERFORM _CDB_SQL(sql,'_CDB_Has_Usable_Geom');
-              RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', 
+              PERFORM @extschema@._CDB_SQL(sql,'_CDB_Has_Usable_Geom');
+              RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %',
                 Format('Text column %s is not convertible to geometry, renamed to %s', r1.attname, str);
             ELSE
               RAISE EXCEPTION 'CDB(_CDB_Has_Usable_Geom) UNEXPECTED ERROR';
@@ -726,10 +727,10 @@ BEGIN
 
       -- Just change its name so we can write a new column into that name.
       ELSE
-        str := cartodb._CDB_Unique_Column_Identifier(NULL, r1.attname, NULL, reloid);
+        str := @extschema@._CDB_Unique_Column_Identifier(NULL, r1.attname, NULL, reloid);
         sql := Format('ALTER TABLE %s RENAME COLUMN %s TO %I', reloid::text, r1.attname, str);
-        PERFORM _CDB_SQL(sql,'_CDB_Has_Usable_Geom');
-        RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', 
+        PERFORM @extschema@._CDB_SQL(sql,'_CDB_Has_Usable_Geom');
+        RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %',
           Format('%s is the wrong type, renamed to %s', r1.attname, str);
       END IF;
 
@@ -749,20 +750,20 @@ BEGIN
           has_mercgeom := true;
           has_mercgeom_name := r1.attname;
         END IF;
-        
+
       -- If it's an unknown SRID, we need to know that too
       ELSIF r1.srid = 0 THEN
-        
+
         -- Unknown SRID, we'll have to fill it in later
         text_geom_column_srid := true;
-        
+
       END IF;
-      
+
     END IF;
-    
+
   END LOOP;
 
-  SELECT 
+  SELECT
     -- If table is perfect (no transforms required), return TRUE!
     has_geom AND has_mercgeom AS has_usable_geoms,
     -- If the geometry column is hiding in a text field, return enough info to deal w/ it.
@@ -772,25 +773,26 @@ BEGIN
     INTO rv;
 
   RAISE DEBUG 'CDB(_CDB_Has_Usable_Geom): %', Format('returning %s', rv);
-  
+
   RETURN rv;
-    
+
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' VOLATILE PARALLEL UNSAFE;
 
 
 -- Create a copy of the table. Assumes that the "Has usable" functions
 -- have already been run, so that if there is a 'cartodb_id' column, it is
 -- a "good" one, and the same for the geometry columns. If all the required
--- columns are in place already, it no-ops and just renames the table to 
+-- columns are in place already, it no-ops and just renames the table to
 -- the destination if necessary.
-CREATE OR REPLACE FUNCTION _CDB_Rewrite_Table(reloid REGCLASS, destschema TEXT DEFAULT NULL)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Rewrite_Table(reloid REGCLASS, destschema TEXT DEFAULT NULL)
 RETURNS BOOLEAN
 AS $$
 DECLARE
 
   relname TEXT;
   relschema TEXT;
+  relseq TEXT;
 
   destoid REGCLASS;
   destname TEXT;
@@ -819,7 +821,7 @@ BEGIN
   RAISE DEBUG 'CDB(_CDB_Rewrite_Table): %', 'entered function';
 
   -- Read CartoDB standard column names in
-  const := _CDB_Columns();
+  const := @extschema@._CDB_Columns();
 
   -- Save the raw schema/table names for later
   SELECT n.nspname, c.relname, c.relname
@@ -835,7 +837,7 @@ BEGIN
   -- See if there is a primary key column we need to carry along to the
   -- new table. If this is true, it implies there is an indexed
   -- primary key of integer type named (by default) cartodb_id
-  SELECT _CDB_Has_Usable_Primary_ID(reloid)
+  SELECT @extschema@._CDB_Has_Usable_Primary_ID(reloid)
   INTO STRICT has_usable_primary_key;
 
   RAISE DEBUG 'CDB(_CDB_Rewrite_Table): has_usable_primary_key %', has_usable_primary_key;
@@ -853,23 +855,23 @@ BEGIN
   -- transformation of the table, we can just ensure proper
   -- indexes are in place and apply a rename
   SELECT *
-  FROM _CDB_Has_Usable_Geom(reloid) 
+  FROM @extschema@._CDB_Has_Usable_Geom(reloid)
   INTO STRICT gc;
 
   -- If geom is the wrong name, just rename it.
   IF gc.has_geom AND gc.has_geom_name != const.geomcol THEN
     sql := Format('ALTER TABLE %s DROP COLUMN IF EXISTS %I', reloid::text, const.geomcol);
-    PERFORM _CDB_SQL(sql,'_CDB_Rewrite_Table');
+    PERFORM @extschema@._CDB_SQL(sql,'_CDB_Rewrite_Table');
     sql := Format('ALTER TABLE %s RENAME COLUMN %I TO %I', reloid::text, gc.has_geom_name, const.geomcol);
-    PERFORM _CDB_SQL(sql,'_CDB_Rewrite_Table');
+    PERFORM @extschema@._CDB_SQL(sql,'_CDB_Rewrite_Table');
   END IF;
 
   -- If mercgeom is the wrong name, just rename it.
   IF gc.has_mercgeom AND gc.has_mercgeom_name != const.mercgeomcol THEN
     sql := Format('ALTER TABLE %s DROP COLUMN IF EXISTS %I', reloid::text, const.mercgeomcol);
-    PERFORM _CDB_SQL(sql,'_CDB_Rewrite_Table');
+    PERFORM @extschema@._CDB_SQL(sql,'_CDB_Rewrite_Table');
     sql := Format('ALTER TABLE %s RENAME COLUMN %I TO %I', reloid::text, gc.has_mercgeom_name, const.mercgeomcol);
-    PERFORM _CDB_SQL(sql,'_CDB_Rewrite_Table');
+    PERFORM @extschema@._CDB_SQL(sql,'_CDB_Rewrite_Table');
   END IF;
 
 
@@ -884,7 +886,7 @@ BEGIN
     IF  destschema != relschema THEN
 
       RAISE DEBUG 'CDB(_CDB_Rewrite_Table): perfect table needs to be moved to schema (%)', destschema;
-      PERFORM _CDB_SQL(Format('ALTER TABLE %s SET SCHEMA %I', reloid::text, destschema), '_CDB_Rewrite_Table');
+      PERFORM @extschema@._CDB_SQL(Format('ALTER TABLE %s SET SCHEMA %I', reloid::text, destschema), '_CDB_Rewrite_Table');
 
     ELSE
 
@@ -898,18 +900,33 @@ BEGIN
 
   -- We must rewrite, so here we go...
 
+  -- Our desired PK sequence name
+
+  -- We are going to drop the source table when we're done anyways
+  -- but it's possible the source PK sequence is living in a name we would like to use
+  -- so we check to see if that's the case, and rename it out of the way
+  IF has_usable_primary_key AND has_usable_pk_sequence THEN
+    -- See if the existing sequence is squatting on our preferred name
+    destseq := Format('%s_%s_seq', relname, const.pkey);
+    SELECT pg_catalog.pg_get_serial_sequence(Format('%I.%I', relschema, relname), const.pkey)
+      INTO relseq;
+    -- If it's the name we want, then rename it
+    IF relseq IS NOT NULL AND relseq = Format('%I.%I', destschema, destseq) THEN
+      PERFORM @extschema@._CDB_SQL(Format('ALTER SEQUENCE %s RENAME TO %I', relseq, Format('tmp_%s', destseq)), '_CDB_Rewrite_Table');
+    END IF;
+  END IF;
 
   -- Put the primary key sequence in the right schema
   -- If the new table is not moving, better ensure the sequence name
   -- is unique
-  destseq := cartodb._CDB_Unique_Identifier(NULL, relname, '_' || const.pkey || '_seq', destschema);
+  destseq := @extschema@._CDB_Unique_Identifier(NULL, relname, '_' || const.pkey || '_seq', destschema);
   destseq := Format('%I.%I', destschema, destseq);
-  PERFORM _CDB_SQL(Format('CREATE SEQUENCE %s', destseq), '_CDB_Rewrite_Table');
+  PERFORM @extschema@._CDB_SQL(Format('CREATE SEQUENCE %s', destseq), '_CDB_Rewrite_Table');
 
   -- Temporary table name if we are re-writing in place
   -- Note copyname is already escaped and safe to use as identifier
   IF destschema = relschema THEN
-    copyname := Format('%I.%I', destschema, cartodb._CDB_Unique_Identifier(NULL, destname, NULL), destschema);
+    copyname := Format('%I.%I', destschema, @extschema@._CDB_Unique_Identifier(NULL, destname, NULL), destschema);
   ELSE
     copyname := Format('%I.%I', destschema, destname);
   END IF;
@@ -931,16 +948,16 @@ BEGIN
 
     -- Arg, this "geometry" column is actually text!!
     -- OK, we tested back in our geometry column research that it could
-    -- be safely cast to geometry, so let's do that.  
+    -- be safely cast to geometry, so let's do that.
     IF gc.text_geom_column THEN
 
       WITH t AS (
-        SELECT 
+        SELECT
           a.attname,
           CASE WHEN NOT gc.text_geom_column_srid THEN 'ST_SetSRID(' ELSE '' END AS missing_srid_start,
           CASE WHEN NOT gc.text_geom_column_srid THEN ',4326)' ELSE '' END AS missing_srid_end
-        FROM pg_class c 
-        JOIN pg_attribute a ON a.attrelid = c.oid 
+        FROM pg_class c
+        JOIN pg_attribute a ON a.attrelid = c.oid
         JOIN pg_type t ON a.atttypid = t.oid
         WHERE c.oid = reloid
         AND t.typname IN ('text','varchar','char')
@@ -950,11 +967,11 @@ BEGIN
         ORDER BY a.attnum
         LIMIT 1
       )
-      SELECT ', ST_Transform('
+      SELECT ', @postgisschema@.ST_Transform('
             || t.missing_srid_start || t.attname || '::geometry' || t.missing_srid_end
             || ',4326)::Geometry(GEOMETRY,4326) AS '
             || const.geomcol
-            || ', cartodb.CDB_TransformToWebmercator(' 
+            || ', @extschema@.CDB_TransformToWebmercator('
             || t.missing_srid_start || t.attname || '::geometry' || t.missing_srid_end
             || ')::Geometry(GEOMETRY,3857) AS '
             || const.mercgeomcol,
@@ -967,19 +984,19 @@ BEGIN
         -- better be found.
         RAISE EXCEPTION 'CDB(_CDB_Rewrite_Table): Text column % is missing!', gc.text_geom_column_name;
       ELSE
-        sql := sql || geom_transform_sql;  
+        sql := sql || geom_transform_sql;
       END IF;
 
     -- There is at least one true geometry column in here, we'll
-    -- reproject that into the projections we need.  
+    -- reproject that into the projections we need.
     ELSE
 
       -- Find the column we are going to be working with (the first
       -- column with type "geometry")
       SELECT a.attname
       INTO rec
-      FROM pg_class c 
-      JOIN pg_attribute a ON a.attrelid = c.oid 
+      FROM pg_class c
+      JOIN pg_attribute a ON a.attrelid = c.oid
       JOIN pg_type t ON a.atttypid = t.oid
       WHERE c.oid = reloid
       AND t.typname = 'geometry'
@@ -989,16 +1006,16 @@ BEGIN
       LIMIT 1;
 
       -- The SRID could be undeclared at the table level, but still
-      -- exist in the geometries themselves. We first find our geometry 
+      -- exist in the geometries themselves. We first find our geometry
       -- column and read the first SRID off it it, if there is a row
       -- to read.
       IF FOUND THEN
-        EXECUTE Format('SELECT ST_SRID(%s) AS srid FROM %s LIMIT 1', rec.attname, reloid::text) 
+        EXECUTE Format('SELECT @postgisschema@.ST_SRID(%s) AS srid FROM %s LIMIT 1', rec.attname, reloid::text)
         INTO geom_srid;
       ELSE
         geom_srid := 0;
       END IF;
-  
+
       -- The geometry columns weren't in the right projection,
       -- so we need to find the first decent geometry column
       -- in the table and wrap it in two transforms, one to 4326
@@ -1006,13 +1023,13 @@ BEGIN
       -- ignore it when we build the list of other columns to
       -- add to the output table
       WITH t AS (
-        SELECT 
-          a.attname, 
-          postgis_typmod_type(a.atttypmod) AS geomtype, 
-          CASE WHEN postgis_typmod_srid(a.atttypmod) = 0 AND srid.srid = 0 THEN 'ST_SetSRID(' ELSE '' END AS missing_srid_start,
+        SELECT
+          a.attname,
+          postgis_typmod_type(a.atttypmod) AS geomtype,
+          CASE WHEN postgis_typmod_srid(a.atttypmod) = 0 AND srid.srid = 0 THEN '@postgisschema@.ST_SetSRID(' ELSE '' END AS missing_srid_start,
           CASE WHEN postgis_typmod_srid(a.atttypmod) = 0 AND srid.srid = 0 THEN ',4326)' ELSE '' END AS missing_srid_end
-        FROM pg_class c 
-        JOIN pg_attribute a ON a.attrelid = c.oid 
+        FROM pg_class c
+        JOIN pg_attribute a ON a.attrelid = c.oid
         JOIN pg_type t ON a.atttypid = t.oid,
         ( SELECT geom_srid AS srid ) AS srid
         WHERE c.oid = reloid
@@ -1022,22 +1039,22 @@ BEGIN
         ORDER BY a.attnum
         LIMIT 1
       )
-      SELECT ', ST_Transform(' 
+      SELECT ', @postgisschema@.ST_Transform('
             || t.missing_srid_start || t.attname || t.missing_srid_end
             || ',4326)::Geometry(GEOMETRY,4326) AS '
             || const.geomcol
-            || ', cartodb.CDB_TransformToWebmercator(' 
+            || ', @extschema@.CDB_TransformToWebmercator('
             || t.missing_srid_start || t.attname || t.missing_srid_end
             || ')::Geometry(GEOMETRY,3857) AS '
             || const.mercgeomcol,
             t.attname
       INTO geom_transform_sql, geom_column_source
       FROM t;
-  
+
       IF NOT FOUND THEN
-        -- If there are no geometry columns, we continue making a 
+        -- If there are no geometry columns, we continue making a
         -- non-spatial table. This is important for folks who want
-        -- their tables to invalidate the SQL API 
+        -- their tables to invalidate the SQL API
         -- cache on update/insert/delete.
         geom_column_source := '';
         sql := sql || ',NULL::geometry(Geometry,4326) AS ' || const.geomcol;
@@ -1054,11 +1071,11 @@ BEGIN
   -- by selecting their names into an array and
   -- joining the array with a comma
   SELECT
-    ',' || array_to_string(array_agg(Format('%I',a.attname)),',') AS column_name_sql,
+    ',' || array_to_string(array_agg(Format('%I',a.attname) ORDER BY a.attnum),',') AS column_name_sql,
     Count(*) AS count
   INTO rec
-  FROM pg_class c 
-  JOIN pg_attribute a ON a.attrelid = c.oid 
+  FROM pg_class c
+  JOIN pg_attribute a ON a.attrelid = c.oid
   JOIN pg_type t ON a.atttypid = t.oid
   WHERE c.oid = reloid
   AND a.attnum > 0
@@ -1080,7 +1097,7 @@ BEGIN
   RAISE DEBUG 'CDB(_CDB_Rewrite_Table): %', sql;
 
   -- Run it!
-  PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
+  PERFORM @extschema@._CDB_SQL(sql, '_CDB_Rewrite_Table');
 
   -- Set up the primary key sequence
   -- If we copied the primary key from the original data, we need
@@ -1090,50 +1107,50 @@ BEGIN
      INTO destseqmax;
 
   IF destseqmax IS NOT NULL THEN
-    PERFORM _CDB_SQL(Format('SELECT setval(''%s'', %s)', destseq, destseqmax), '_CDB_Rewrite_Table');
+    PERFORM @extschema@._CDB_SQL(Format('SELECT setval(''%s'', %s)', destseq, destseqmax), '_CDB_Rewrite_Table');
   END IF;
 
    -- Make the primary key use the sequence as its default value
   sql := Format('ALTER TABLE %s ALTER COLUMN %s SET DEFAULT nextval(''%s'')',
           copyname, const.pkey, destseq);
-  PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
+  PERFORM @extschema@._CDB_SQL(sql, '_CDB_Rewrite_Table');
 
   -- Make the sequence owned by the table, so when the table drops,
   -- the sequence does too
   sql := Format('ALTER SEQUENCE %s OWNED BY %s.%s', destseq, copyname, const.pkey);
-  PERFORM _CDB_SQL(sql,'_CDB_Rewrite_Table');
+  PERFORM @extschema@._CDB_SQL(sql,'_CDB_Rewrite_Table');
+
 
-  
   -- We just made a copy, so we can drop the original now
   sql := Format('DROP TABLE %s', reloid::text);
-  PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
-  
+  PERFORM @extschema@._CDB_SQL(sql, '_CDB_Rewrite_Table');
+
   -- If the table is being created by a SECURITY DEFINER function
   -- make sure the user is set back to the user who is connected
   IF current_user != session_user THEN
     sql := Format('ALTER TABLE IF EXISTS %s OWNER TO %s', copyname, session_user);
-    PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
+    PERFORM @extschema@._CDB_SQL(sql, '_CDB_Rewrite_Table');
     sql := Format('ALTER SEQUENCE IF EXISTS %s OWNER TO %s', destseq, session_user);
-    PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
+    PERFORM @extschema@._CDB_SQL(sql, '_CDB_Rewrite_Table');
   END IF;
-  
+
   -- If we used a temporary destination table
   -- we can now rename it into place
   IF destschema = relschema THEN
     sql := Format('ALTER TABLE %s RENAME TO %I', copyname, destname);
-    PERFORM _CDB_SQL(sql, '_CDB_Rewrite_Table');
+    PERFORM @extschema@._CDB_SQL(sql, '_CDB_Rewrite_Table');
   END IF;
 
   RETURN true;
 
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' VOLATILE PARALLEL UNSAFE;
 
 
 -- Assumes the table already has the right metadata columns
 -- (primary key and two geometry columns) and adds primary key
 -- and geometry indexes if necessary.
-CREATE OR REPLACE FUNCTION _CDB_Add_Indexes(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Add_Indexes(reloid REGCLASS)
   RETURNS BOOLEAN
 AS $$
 DECLARE
@@ -1147,7 +1164,7 @@ BEGIN
   RAISE DEBUG 'CDB(_CDB_Add_Indexes): %', 'entered function';
 
   -- Read CartoDB standard column names in
-  const := _CDB_Columns();
+  const := @extschema@._CDB_Columns();
 
   -- Extract just the relname to use for the index names
   SELECT c.relname
@@ -1155,15 +1172,15 @@ BEGIN
   FROM pg_class c
   WHERE c.oid = reloid;
 
-  -- Is there already a primary key on this table for 
+  -- Is there already a primary key on this table for
   -- a column other than our chosen primary key?
   SELECT ci.relname AS pkey
   INTO rec
-  FROM pg_class c 
-  JOIN pg_attribute a ON a.attrelid = c.oid 
+  FROM pg_class c
+  JOIN pg_attribute a ON a.attrelid = c.oid
   LEFT JOIN pg_index i ON c.oid = i.indrelid AND a.attnum = ANY(i.indkey)
   JOIN pg_class ci ON i.indexrelid = ci.oid
-  WHERE c.oid = reloid 
+  WHERE c.oid = reloid
   AND NOT a.attisdropped
   AND a.attname != const.pkey
   AND i.indisprimary;
@@ -1173,47 +1190,47 @@ BEGIN
   IF FOUND THEN
     RAISE DEBUG 'CDB(_CDB_Add_Indexes): dropping unwanted primary key ''%''', rec.pkey;
     sql := Format('ALTER TABLE %s DROP CONSTRAINT IF EXISTS %s', reloid::text, rec.pkey);
-    PERFORM _CDB_SQL(sql, '_CDB_Add_Indexes');
+    PERFORM @extschema@._CDB_SQL(sql, '_CDB_Add_Indexes');
   END IF;
 
 
   -- Is the default primary key flagged as primary?
   SELECT a.attname
   INTO rec
-  FROM pg_class c 
-  JOIN pg_attribute a ON a.attrelid = c.oid 
+  FROM pg_class c
+  JOIN pg_attribute a ON a.attrelid = c.oid
   JOIN pg_index i ON c.oid = i.indrelid AND a.attnum = ANY(i.indkey)
   JOIN pg_class ci ON ci.oid = i.indexrelid
-  WHERE attnum > 0 
+  WHERE attnum > 0
   AND c.oid = reloid
   AND a.attname = const.pkey
   AND i.indisprimary
   AND i.indisunique
   AND NOT attisdropped;
-  
+
   -- No primary key? Add one.
   IF NOT FOUND THEN
     sql := Format('ALTER TABLE %s ADD PRIMARY KEY (%s)', reloid::text, const.pkey);
-    PERFORM _CDB_SQL(sql, '_CDB_Add_Indexes');
+    PERFORM @extschema@._CDB_SQL(sql, '_CDB_Add_Indexes');
   END IF;
-  
-  -- Add geometry indexes to all "special geometry columns" that 
+
+  -- Add geometry indexes to all "special geometry columns" that
   -- don't have one (either have no index at all, or have a non-GIST index)
-  FOR rec IN 
+  FOR rec IN
     SELECT a.attname, n.nspname
-    FROM pg_class c 
+    FROM pg_class c
     JOIN pg_namespace n ON n.oid = c.relnamespace
-    JOIN pg_attribute a ON a.attrelid = c.oid AND attnum > 0 
+    JOIN pg_attribute a ON a.attrelid = c.oid AND attnum > 0
     LEFT JOIN pg_index i ON c.oid = i.indrelid AND a.attnum = ANY(i.indkey)
     WHERE NOT attisdropped
     AND a.attname IN (const.geomcol, const.mercgeomcol)
     AND c.oid = reloid
     AND i.indexrelid IS NULL
-    UNION 
+    UNION
     SELECT a.attname, n.nspname
-    FROM pg_class c 
+    FROM pg_class c
     JOIN pg_namespace n ON n.oid = c.relnamespace
-    JOIN pg_attribute a ON a.attrelid = c.oid AND attnum > 0 
+    JOIN pg_attribute a ON a.attrelid = c.oid AND attnum > 0
     JOIN pg_index i ON c.oid = i.indrelid AND a.attnum = ANY(i.indkey)
     JOIN pg_class ci ON ci.oid = i.indexrelid
     JOIN pg_am am ON ci.relam = am.oid
@@ -1223,20 +1240,20 @@ BEGIN
     AND am.amname != 'gist'
   LOOP
     sql := Format('CREATE INDEX ON %s USING GIST (%s)', reloid::text, rec.attname);
-    PERFORM _CDB_SQL(sql, '_CDB_Add_Indexes');
+    PERFORM @extschema@._CDB_SQL(sql, '_CDB_Add_Indexes');
   END LOOP;
-    
+
   RETURN true;
 
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' VOLATILE PARALLEL UNSAFE;
 
-DROP FUNCTION IF EXISTS CDB_CartodbfyTable(destschema TEXT, reloid REGCLASS);
-CREATE OR REPLACE FUNCTION CDB_CartodbfyTable(destschema TEXT, reloid REGCLASS)
+DROP FUNCTION IF EXISTS @extschema@.CDB_CartodbfyTable(destschema TEXT, reloid REGCLASS);
+CREATE OR REPLACE FUNCTION @extschema@.CDB_CartodbfyTable(destschema TEXT, reloid REGCLASS)
 RETURNS REGCLASS
 AS $$
 DECLARE
-  
+
   is_raster BOOLEAN;
   relname TEXT;
   relschema TEXT;
@@ -1245,21 +1262,21 @@ DECLARE
   destname TEXT;
 
   rec RECORD;
-  
+
 BEGIN
 
   -- Save the raw schema/table names for later
   SELECT n.nspname, c.relname, c.relname
   INTO STRICT relschema, relname, destname
-  FROM pg_class c JOIN pg_namespace n ON c.relnamespace = n.oid 
+  FROM pg_class c JOIN pg_namespace n ON c.relnamespace = n.oid
   WHERE c.oid = reloid;
 
-  PERFORM cartodb._CDB_check_prerequisites(destschema, reloid);
+  PERFORM @extschema@._CDB_check_prerequisites(destschema, reloid);
 
   -- Check destination schema exists
   -- Throws an exception of there is no matching schema
   IF destschema IS NOT NULL THEN
-  
+
     SELECT n.nspname
     INTO rec FROM pg_namespace n WHERE n.nspname = destschema;
     IF NOT FOUND THEN
@@ -1271,32 +1288,32 @@ BEGIN
   END IF;
 
   -- Drop triggers first
-  PERFORM _CDB_drop_triggers(reloid);
+  PERFORM @extschema@._CDB_drop_triggers(reloid);
 
   -- Rasters only get a cartodb_id and a limited selection of triggers
   -- underlying assumption is that they are already formed up correctly
-  SELECT cartodb._CDB_is_raster_table(destschema, reloid) INTO is_raster;
+  SELECT @extschema@._CDB_is_raster_table(destschema, reloid) INTO is_raster;
   IF is_raster THEN
 
-    PERFORM cartodb._CDB_create_cartodb_id_column(reloid);
-    PERFORM cartodb._CDB_create_raster_triggers(destschema, reloid);
+    PERFORM @extschema@._CDB_create_cartodb_id_column(reloid);
+    PERFORM @extschema@._CDB_create_raster_triggers(destschema, reloid);
 
   ELSE
-    
+
     -- Rewrite (or rename) the table to the new location
-    PERFORM _CDB_Rewrite_Table(reloid, destschema);
+    PERFORM @extschema@._CDB_Rewrite_Table(reloid, destschema);
 
     -- The old regclass might not be valid anymore if we re-wrote the table...
     destoid := (destschema || '.' || destname)::regclass;
 
     -- Add indexes to the destination table, as necessary
-    PERFORM _CDB_Add_Indexes(destoid);
-  
+    PERFORM @extschema@._CDB_Add_Indexes(destoid);
+
     -- Add triggers to the destination table, as necessary
-    PERFORM _CDB_create_triggers(destschema, destoid);
+    PERFORM @extschema@._CDB_create_triggers(destschema, destoid);
 
   END IF;
 
   RETURN (destschema || '.' || destname)::regclass;
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' VOLATILE PARALLEL UNSAFE;

scripts-available/CDB_ColumnNames.sql

@@ -1,5 +1,5 @@
 -- Function returning the column names of a table
-CREATE OR REPLACE FUNCTION CDB_ColumnNames(REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_ColumnNames(REGCLASS)
 RETURNS SETOF information_schema.sql_identifier
 AS $$
   SELECT
@@ -9,8 +9,8 @@ AS $$
     WHERE c.oid = $1::oid
     AND a.attstattarget < 0 -- exclude system columns
    ORDER BY a.attnum;
-$$ LANGUAGE SQL;
+$$ LANGUAGE SQL STABLE PARALLEL SAFE;
 
 -- This is to migrate from pre-0.2.0 version
 -- See http://github.com/CartoDB/cartodb-postgresql/issues/36
-GRANT EXECUTE ON FUNCTION CDB_ColumnNames(REGCLASS) TO PUBLIC;
+GRANT EXECUTE ON FUNCTION @extschema@.CDB_ColumnNames(REGCLASS) TO PUBLIC;

scripts-available/CDB_ColumnType.sql

@@ -1,5 +1,5 @@
 -- Function returning the type of a column
-CREATE OR REPLACE FUNCTION CDB_ColumnType(REGCLASS, TEXT)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_ColumnType(REGCLASS, TEXT)
 RETURNS information_schema.character_data
 AS $$
   SELECT
@@ -9,8 +9,8 @@ AS $$
   WHERE c.oid = $1::oid
   AND a.attname = $2
   AND a.attstattarget < 0; -- exclude system columns
-$$ LANGUAGE SQL;
+$$ LANGUAGE SQL STABLE PARALLEL SAFE;
 
 -- This is to migrate from pre-0.2.0 version
 -- See http://github.com/CartoDB/cartodb-postgresql/issues/36
-GRANT EXECUTE ON FUNCTION CDB_ColumnType(REGCLASS, TEXT) TO public;
+GRANT EXECUTE ON FUNCTION @extschema@.CDB_ColumnType(REGCLASS, TEXT) TO public;

scripts-available/CDB_Conf.sql

@@ -5,44 +5,44 @@
 -- Functions needing reading configuration should use SECURITY DEFINER.
 ----------------------------------
 
--- This will trigger NOTICE if cartodb.CDB_CONF already exists
+-- This will trigger NOTICE if @extschema@.CDB_CONF already exists
 DO LANGUAGE 'plpgsql' $$
 BEGIN
-    CREATE TABLE IF NOT EXISTS cartodb.CDB_CONF ( KEY TEXT PRIMARY KEY, VALUE JSON NOT NULL );
+    CREATE TABLE IF NOT EXISTS @extschema@.CDB_CONF ( KEY TEXT PRIMARY KEY, VALUE JSON NOT NULL );
 END
 $$;
 
 -- This can only be called from an SQL script executed by CREATE EXTENSION
 DO LANGUAGE 'plpgsql' $$
 BEGIN
-    PERFORM pg_catalog.pg_extension_config_dump('cartodb.CDB_CONF', '');
+    PERFORM pg_catalog.pg_extension_config_dump('@extschema@.CDB_CONF', '');
 END
 $$;
 
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Conf_SetConf(key text, value JSON)
+FUNCTION @extschema@.CDB_Conf_SetConf(key text, value JSON)
     RETURNS void AS $$
 BEGIN
-    PERFORM cartodb.CDB_Conf_RemoveConf(key);
-    EXECUTE 'INSERT INTO cartodb.CDB_CONF (KEY, VALUE) VALUES ($1, $2);' USING key, value;
+    PERFORM @extschema@.CDB_Conf_RemoveConf(key);
+    EXECUTE 'INSERT INTO @extschema@.CDB_CONF (KEY, VALUE) VALUES ($1, $2);' USING key, value;
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Conf_RemoveConf(key text)
+FUNCTION @extschema@.CDB_Conf_RemoveConf(key text)
     RETURNS void AS $$
 BEGIN
-    EXECUTE 'DELETE FROM cartodb.CDB_CONF WHERE KEY = $1;' USING key;
+    EXECUTE 'DELETE FROM @extschema@.CDB_CONF WHERE KEY = $1;' USING key;
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Conf_GetConf(key text)
+FUNCTION @extschema@.CDB_Conf_GetConf(key text)
     RETURNS JSON AS $$
 DECLARE
     value JSON;
 BEGIN
-    EXECUTE 'SELECT VALUE FROM cartodb.CDB_CONF WHERE KEY = $1;' INTO value USING key;
+    EXECUTE 'SELECT VALUE FROM @extschema@.CDB_CONF WHERE KEY = $1;' INTO value USING key;
     RETURN value;
 END
-$$ LANGUAGE PLPGSQL STABLE;
+$$ LANGUAGE PLPGSQL STABLE PARALLEL SAFE;

scripts-available/CDB_DDLTriggers.sql

@@ -0,0 +1,14 @@
+--
+-- Legacy file
+-- Introduced again to make sure that updates do not leave dangling functions
+--
+
+DROP FUNCTION IF EXISTS @extschema@.cdb_handle_create_table();
+DROP FUNCTION IF EXISTS @extschema@.cdb_handle_drop_table();
+DROP FUNCTION IF EXISTS @extschema@.cdb_handle_alter_column();
+DROP FUNCTION IF EXISTS @extschema@.cdb_handle_drop_column();
+DROP FUNCTION IF EXISTS @extschema@.cdb_handle_add_column();
+DROP FUNCTION IF EXISTS @extschema@.cdb_disable_ddl_hooks();
+DROP FUNCTION IF EXISTS @extschema@.cdb_enable_ddl_hooks();
+
+

scripts-available/CDB_DateToNumber.sql

@@ -1,6 +1,6 @@
 -- Convert timestamp to double precision
 --
-CREATE OR REPLACE FUNCTION CDB_DateToNumber(input timestamp)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_DateToNumber(input timestamp)
 RETURNS double precision AS $$
 DECLARE output double precision;
 BEGIN
@@ -12,11 +12,11 @@ BEGIN
 RETURN output;
 END;
 $$
-LANGUAGE 'plpgsql' STABLE STRICT;
+LANGUAGE 'plpgsql' IMMUTABLE STRICT PARALLEL UNSAFE;
 
 -- Convert timestamp with time zone to double precision
 --
-CREATE OR REPLACE FUNCTION CDB_DateToNumber(input timestamp with time zone)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_DateToNumber(input timestamp with time zone)
 RETURNS double precision AS $$
 DECLARE output double precision;
 BEGIN
@@ -28,4 +28,4 @@ BEGIN
 RETURN output;
 END;
 $$
-LANGUAGE 'plpgsql' STABLE STRICT;
+LANGUAGE 'plpgsql' IMMUTABLE STRICT PARALLEL UNSAFE;

scripts-available/CDB_DigitSeparator.sql

@@ -1,5 +1,5 @@
 -- Find thousand and decimal digits separators
-CREATE OR REPLACE FUNCTION CDB_DigitSeparator (rel REGCLASS, fld TEXT, OUT t CHAR, OUT d CHAR)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_DigitSeparator (rel REGCLASS, fld TEXT, OUT t CHAR, OUT d CHAR)
 as $$ 
 DECLARE
   sql TEXT;
@@ -50,4 +50,4 @@ BEGIN
 
 END
 $$
-LANGUAGE 'plpgsql' STABLE STRICT;
+LANGUAGE 'plpgsql' STABLE STRICT PARALLEL SAFE;

scripts-available/CDB_DistType.sql

@@ -10,7 +10,7 @@
 --    1. width_bucket/histograms: http://tapoueh.org/blog/2014/02/21-PostgreSQL-histogram
 --    2. R implementation: https://github.com/cran/agrmt
 
-CREATE OR REPLACE FUNCTION CDB_DistType ( in_array NUMERIC[] ) RETURNS text as $$
+CREATE OR REPLACE FUNCTION @extschema@.CDB_DistType ( in_array NUMERIC[] ) RETURNS text as $$
 DECLARE
     element_count INT4;
     minv numeric;
@@ -60,16 +60,16 @@ BEGIN
             i := i + 1;
         END LOOP;
 
-        signature = _CDB_DistTypeClassify(ajus);
+        signature = @extschema@._CDB_DistTypeClassify(ajus);
     END IF;
 
     RETURN signature;
 END;
-$$ language plpgsql IMMUTABLE;
+$$ language plpgsql IMMUTABLE STRICT PARALLEL SAFE;
 
 -- Classify data into AJUSFL
 
-CREATE OR REPLACE FUNCTION _CDB_DistTypeClassify ( in_array INT[] ) RETURNS text as $$
+CREATE OR REPLACE FUNCTION @extschema@._CDB_DistTypeClassify ( in_array INT[] ) RETURNS text as $$
 DECLARE
     element_count INT4;
     maxv numeric;
@@ -119,4 +119,4 @@ BEGIN
 
     RETURN type;
 END;
-$$ language plpgsql IMMUTABLE;
+$$ language plpgsql IMMUTABLE STRICT PARALLEL SAFE;

scripts-available/CDB_DistinctMeasure.sql

@@ -5,7 +5,7 @@
 -- 
 -- 
 
-CREATE OR REPLACE FUNCTION CDB_DistinctMeasure ( in_array text[], threshold numeric DEFAULT null ) RETURNS numeric as $$
+CREATE OR REPLACE FUNCTION @extschema@.CDB_DistinctMeasure ( in_array text[], threshold numeric DEFAULT null ) RETURNS numeric as $$
 DECLARE
     element_count INT4;
     maxval numeric;
@@ -43,4 +43,4 @@ BEGIN
 
     RETURN passes;
 END;
-$$ language plpgsql IMMUTABLE;
+$$ language plpgsql IMMUTABLE PARALLEL SAFE;

scripts-available/CDB_EqualIntervalBins.sql

@@ -1,8 +1,8 @@
 --
 -- Calculate the equal interval bins for a given column
 --
--- @param in_array A numeric array of numbers to determine the best
---                   to determine the bin boundary
+-- @param in_array An array of numbers to determine the best
+--                   bin boundary
 --
 -- @param breaks The number of bins you want to find.
 --  
@@ -11,27 +11,14 @@
 -- 
 --
 
-CREATE OR REPLACE FUNCTION CDB_EqualIntervalBins ( in_array NUMERIC[], breaks INT ) RETURNS NUMERIC[] as $$
-DECLARE 
-    diff numeric;
-    min_val numeric;
-    max_val numeric;
-    tmp_val numeric;
-    i INT := 1;
-    reply numeric[];
-BEGIN
-    SELECT min(e), max(e) INTO min_val, max_val FROM ( SELECT unnest(in_array) e ) x WHERE e IS NOT NULL;
-    diff = (max_val - min_val) / breaks::numeric;
-    LOOP
-        IF i < breaks THEN
-            tmp_val = min_val + i::numeric * diff;
-            reply = array_append(reply, tmp_val);
-            i := i+1;
-        ELSE
-            reply = array_append(reply, max_val);
-            EXIT;
-        END IF;
-    END LOOP;
-    RETURN reply;
-END;
-$$ language plpgsql IMMUTABLE;
+CREATE OR REPLACE FUNCTION @extschema@.CDB_EqualIntervalBins ( in_array anyarray, breaks INT ) RETURNS anyarray as $$
+WITH stats AS (
+  SELECT min(e), (max(e)-min(e))/breaks AS del
+    FROM (SELECT unnest(in_array) e) AS p)
+SELECT array_agg(bins)
+  FROM (
+    SELECT min + generate_series(1,breaks)*del AS bins
+      FROM stats) q;
+$$ LANGUAGE SQL IMMUTABLE PARALLEL SAFE;
+
+DROP FUNCTION IF EXISTS @extschema@.CDB_EqualIntervalBins( numeric[], integer);

scripts-available/CDB_EstimateRowCount.sql

@@ -0,0 +1,36 @@
+-- Internal function to generate stats for a table if they don't exist
+CREATE OR REPLACE FUNCTION @extschema@._CDB_GenerateStats(reloid REGCLASS)
+RETURNS VOID
+AS $$
+DECLARE
+  has_stats BOOLEAN;
+BEGIN
+  SELECT EXISTS (
+    SELECT * FROM pg_catalog.pg_statistic WHERE starelid = reloid
+  ) INTO has_stats;
+  IF NOT has_stats THEN
+    EXECUTE Format('ANALYZE %s;', reloid);
+  END IF;
+END
+$$  LANGUAGE 'plpgsql'
+    VOLATILE
+    STRICT
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
+
+-- Return a row count estimate of the result of a query using statistics
+CREATE OR REPLACE FUNCTION @extschema@.CDB_EstimateRowCount(query text)
+RETURNS Numeric
+AS $$
+DECLARE
+  plan JSON;
+BEGIN
+  -- Make sure statistics exist for all the tables of the query
+  PERFORM @extschema@._CDB_GenerateStats(tabname) FROM  unnest(@extschema@.CDB_QueryTablesText(query)) AS tabname;
+
+  -- Use the query planner to obtain an estimate of the number of result rows
+  EXECUTE 'EXPLAIN (FORMAT JSON) ' || query INTO STRICT plan;
+  RETURN plan->0->'Plan'->'Plan Rows';
+END
+$$ LANGUAGE 'plpgsql' VOLATILE STRICT PARALLEL UNSAFE;

scripts-available/CDB_ExtensionPost.sql

@@ -1,2 +1,2 @@
-SELECT pg_catalog.pg_extension_config_dump('cartodb.cdb_tablemetadata','');
+SELECT pg_catalog.pg_extension_config_dump('@extschema@.cdb_tablemetadata','');
 

scripts-available/CDB_ExtensionUtils.sql

@@ -1,20 +1,20 @@
-CREATE OR REPLACE FUNCTION cartodb.cdb_extension_reload() RETURNS void
+CREATE OR REPLACE FUNCTION @extschema@.cdb_extension_reload() RETURNS void
 AS $$
 DECLARE
   ver TEXT;
   sql TEXT;
 BEGIN
-  ver := split_part(cartodb.cdb_version(), ' ', 1);
+  ver := split_part(@extschema@.cdb_version(), ' ', 1);
   sql := 'ALTER EXTENSION cartodb UPDATE TO ''' || ver || 'next''';
   EXECUTE sql;
   sql := 'ALTER EXTENSION cartodb UPDATE TO ''' || ver || '''';
   EXECUTE sql;
 END;
-$$ language 'plpgsql' VOLATILE;
+$$ language 'plpgsql' VOLATILE PARALLEL UNSAFE;
 
-CREATE OR REPLACE FUNCTION cartodb.schema_exists(schema_name text)
+CREATE OR REPLACE FUNCTION @extschema@.schema_exists(schema_name text)
 RETURNS boolean AS
 $$
   SELECT EXISTS(SELECT 1 FROM pg_namespace WHERE nspname = schema_name::text);
 $$
-language sql VOLATILE;
+language sql STABLE PARALLEL SAFE;

scripts-available/CDB_FederatedServer.sql

@@ -0,0 +1,437 @@
+--------------------------------------------------------------------------------
+-- Private functions
+--------------------------------------------------------------------------------
+
+--
+-- This function is just a placement to store and use the pattern for
+-- foreign object names
+-- Servers:         cdb_fs_$(server_name)
+-- View schema:     cdb_fs_$(server_name)
+--  > This is where all views created when importing tables are placed
+--  > One server has only one view schema
+-- Import Schemas:  cdb_fs_schema_$(md5sum(server_name || remote_schema_name))
+--  > This is where the foreign tables are placed
+--  > One server has one import schema per remote schema plus auxiliar ones used
+--      to access the remote catalog (pg_catalog, information_schema...)
+-- Owner role:      cdb_fs_$(md5sum(current_database() || server_name)
+--  > This is the role than owns all schemas and tables related to the server
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Name_Pattern()
+RETURNS TEXT
+AS $$
+    SELECT 'cdb_fs_'::text;
+$$
+LANGUAGE SQL IMMUTABLE PARALLEL SAFE;
+
+--
+-- Produce a valid DB name for servers generated for the Federated Server
+-- If check_existence is true, it'll throw if the server doesn't exists
+-- This name is also used as the schema to store views
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Generate_Server_Name(input_name TEXT, check_existence BOOL)
+RETURNS NAME
+AS $$
+DECLARE
+    internal_server_name text := format('%s%s', @extschema@.__CDB_FS_Name_Pattern(), input_name);
+BEGIN
+    IF input_name IS NULL OR char_length(input_name) = 0 THEN
+        RAISE EXCEPTION 'Server name cannot be NULL';
+    END IF;
+
+    -- We discard anything that would be truncated
+    IF (char_length(internal_server_name) >= 64) THEN
+        RAISE EXCEPTION 'Server name (%) is too long to be used as identifier', input_name;
+    END IF;
+
+    IF (check_existence AND (NOT EXISTS (SELECT * FROM pg_foreign_server WHERE srvname = internal_server_name))) THEN
+        RAISE EXCEPTION 'Server "%" does not exist', input_name;
+    END IF;
+
+    RETURN internal_server_name::name;
+END
+$$
+LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
+
+--
+-- Given the internal name for a remote server, it returns the name used by the user
+-- Reverses __CDB_FS_Generate_Server_Name
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Extract_Server_Name(internal_server_name NAME)
+RETURNS TEXT
+AS $$
+    SELECT right(internal_server_name,
+            char_length(internal_server_name::TEXT) - char_length(@extschema@.__CDB_FS_Name_Pattern()))::TEXT;
+$$
+LANGUAGE SQL IMMUTABLE PARALLEL SAFE;
+
+--
+-- Produce a valid name for a schema generated for the Federated Server
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Generate_Schema_Name(internal_server_name NAME, schema_name TEXT)
+RETURNS NAME
+AS $$
+DECLARE
+    hash_value text := md5(internal_server_name::text || '__' || schema_name::text);
+BEGIN
+    IF schema_name IS NULL THEN
+        RAISE EXCEPTION 'Schema name cannot be NULL';
+    END IF;
+    RETURN format('%s%s%s', @extschema@.__CDB_FS_Name_Pattern(), 'schema_', hash_value)::name;
+END
+$$
+LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
+
+--
+-- Produce a valid name for a role generated for the Federated Server
+-- This needs to include the current database in its hash to avoid collisions in clusters with more than one database
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Generate_Server_Role_Name(internal_server_name NAME)
+RETURNS NAME
+AS $$
+DECLARE
+    hash_value text := md5(current_database()::text || '__' || internal_server_name::text);
+    role_name text := format('%s%s%s', @extschema@.__CDB_FS_Name_Pattern(), 'role_', hash_value);
+BEGIN
+    RETURN role_name::name;
+END
+$$
+LANGUAGE PLPGSQL STABLE PARALLEL SAFE;
+
+--
+-- Creates (if not exist) a schema to place the objects for a remote schema
+-- The schema is with the same AUTHORIZATION as the server
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Create_Schema(internal_server_name NAME, schema_name TEXT)
+RETURNS NAME
+AS $$
+DECLARE
+    schema_name name := @extschema@.__CDB_FS_Generate_Schema_Name(internal_server_name, schema_name);
+    role_name name := @extschema@.__CDB_FS_Generate_Server_Role_Name(internal_server_name);
+BEGIN
+    -- By changing the local role to the owner of the server we have an
+    -- easy way to check for permissions and keep all objects under the same owner
+    BEGIN
+        EXECUTE 'SET LOCAL ROLE ' || quote_ident(role_name);
+    EXCEPTION
+    WHEN invalid_parameter_value THEN
+        RAISE EXCEPTION 'Server "%" does not exist',
+                        @extschema@.__CDB_FS_Extract_Server_Name(internal_server_name);
+    WHEN OTHERS THEN
+        RAISE EXCEPTION 'Not enough permissions to access the server "%"',
+                        @extschema@.__CDB_FS_Extract_Server_Name(internal_server_name);
+    END;
+
+    IF NOT EXISTS (SELECT oid FROM pg_namespace WHERE nspname = schema_name) THEN
+        EXECUTE 'CREATE SCHEMA ' || quote_ident(schema_name) || ' AUTHORIZATION ' || quote_ident(role_name);
+    END IF;
+    RETURN schema_name;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- Returns the type of a server by internal name
+-- Currently all of them should be postgres_fdw
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_server_type(internal_server_name NAME)
+RETURNS name
+AS $$
+    SELECT f.fdwname
+        FROM pg_foreign_server s
+        JOIN pg_foreign_data_wrapper f ON s.srvfdw = f.oid
+        WHERE s.srvname = internal_server_name;
+$$
+LANGUAGE SQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- Take a config jsonb and transform it to an input suitable for _CDB_SetUp_User_PG_FDW_Server
+-- 
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_credentials_to_user_mapping(input_config JSONB)
+RETURNS jsonb
+AS $$
+DECLARE
+    mapping jsonb := '{}'::jsonb;
+BEGIN
+    IF NOT (input_config ? 'credentials') THEN
+        RAISE EXCEPTION 'Credentials are mandatory';
+    END IF;
+
+    -- For now, allow not passing username or password
+    IF input_config->'credentials'->'username' IS NOT NULL THEN
+        mapping := jsonb_build_object('user', input_config->'credentials'->'username');
+    END IF;
+    IF input_config->'credentials'->'password' IS NOT NULL THEN
+        mapping := mapping || jsonb_build_object('password', input_config->'credentials'->'password');
+    END IF;
+
+    RETURN (input_config - 'credentials')::jsonb || jsonb_build_object('user_mapping', mapping);
+END
+$$
+LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
+
+-- Take a config jsonb as input and return it augmented with default
+-- options
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_add_default_options(input_config jsonb)
+RETURNS jsonb
+AS $$
+DECLARE
+    default_options jsonb := '{
+        "extensions": "postgis",
+        "updatable": "false",
+        "use_remote_estimate": "true",
+        "fetch_size": "1000"
+    }';
+    server_config jsonb;
+BEGIN
+    IF NOT (input_config ? 'server') THEN
+        RAISE EXCEPTION 'Server information is mandatory';
+    END IF;
+    server_config := default_options || to_jsonb(input_config->'server');
+    RETURN jsonb_set(input_config, '{server}'::text[], server_config);
+END
+$$
+LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
+
+-- Given an server name, returns the username used in the configuration if the caller has rights to access it
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_get_usermapping_username(internal_server_name NAME)
+RETURNS text
+AS $$
+DECLARE
+    role_name name := @extschema@.__CDB_FS_Generate_Server_Role_Name(internal_server_name);
+    username text;
+BEGIN
+    BEGIN
+        EXECUTE 'SET LOCAL ROLE ' || quote_ident(role_name);
+    EXCEPTION WHEN OTHERS THEN
+        RETURN NULL;
+    END;
+
+    SELECT (SELECT option_value FROM pg_options_to_table(u.umoptions) WHERE option_name LIKE 'user') as name INTO username
+        FROM pg_foreign_server s
+        LEFT JOIN pg_user_mappings u
+        ON u.srvid = s.oid
+        WHERE s.srvname = internal_server_name
+        ORDER BY 1;
+
+    RESET ROLE;
+
+    RETURN username;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+
+--------------------------------------------------------------------------------
+-- Public functions
+--------------------------------------------------------------------------------
+
+
+--
+-- Registers a new PG server
+--
+-- Example config: '{
+--     "server": {
+--         "dbname": "fdw_target",
+--         "host": "localhost",
+--         "port": 5432,
+--         "extensions": "postgis",
+--         "updatable": "false",
+--         "use_remote_estimate": "true",
+--         "fetch_size": "1000"
+--     },
+--     "credentials": {
+--         "username": "fdw_user",
+--         "password": "foobarino"
+--     }
+-- }'
+--
+-- The configuration from __CDB_FS_add_default_options will be appended
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Server_Register_PG(server TEXT, config JSONB)
+RETURNS void
+AS $$
+DECLARE
+    server_internal name := @extschema@.__CDB_FS_Generate_Server_Name(input_name => server, check_existence => false);
+    final_config json := @extschema@.__CDB_FS_credentials_to_user_mapping(@extschema@.__CDB_FS_add_default_options(config));
+    role_name name := @extschema@.__CDB_FS_Generate_Server_Role_Name(server_internal);
+    row record;
+    option record;
+BEGIN
+    IF NOT EXISTS (SELECT * FROM pg_extension WHERE extname = 'postgres_fdw') THEN
+        RAISE EXCEPTION 'postgres_fdw extension is not installed'
+            USING HINT = 'Please install it with `CREATE EXTENSION postgres_fdw`';
+    END IF;
+
+    -- We only create server and roles if the server didn't exist before
+    IF NOT EXISTS (SELECT * FROM pg_foreign_server WHERE srvname = server_internal) THEN
+        BEGIN
+            EXECUTE FORMAT('CREATE SERVER %I FOREIGN DATA WRAPPER postgres_fdw', server_internal);
+            IF NOT EXISTS (SELECT 1 FROM pg_roles WHERE rolname = role_name) THEN
+                EXECUTE FORMAT('CREATE ROLE %I NOLOGIN', role_name);
+            END IF;
+            EXECUTE FORMAT('GRANT ALL PRIVILEGES ON DATABASE %I TO %I', current_database(), role_name);
+
+            -- These grants over `@extschema@` and `@postgisschema@` are necessary for the cases
+            -- where the schemas aren't accessible to PUBLIC, which is what happens in a CARTO database
+            EXECUTE FORMAT('GRANT USAGE ON SCHEMA %I TO %I', '@extschema@', role_name);
+            EXECUTE FORMAT('GRANT EXECUTE ON ALL FUNCTIONS IN SCHEMA %I TO %I', '@extschema@', role_name);
+            EXECUTE FORMAT('GRANT USAGE ON SCHEMA %I TO %I', '@postgisschema@', role_name);
+            EXECUTE FORMAT('GRANT EXECUTE ON ALL FUNCTIONS IN SCHEMA %I TO %I', '@postgisschema@', role_name);
+            EXECUTE FORMAT('GRANT SELECT ON ALL TABLES IN SCHEMA %I TO %I', '@postgisschema@', role_name);
+
+            EXECUTE FORMAT('GRANT USAGE ON FOREIGN DATA WRAPPER postgres_fdw TO %I', role_name);
+            EXECUTE FORMAT('GRANT USAGE ON FOREIGN DATA WRAPPER postgres_fdw TO %I', role_name);
+            EXECUTE FORMAT('GRANT USAGE ON FOREIGN SERVER %I TO %I', server_internal, role_name);
+            EXECUTE FORMAT('ALTER SERVER %I OWNER TO %I', server_internal, role_name);
+            EXECUTE FORMAT ('CREATE USER MAPPING FOR %I SERVER %I', role_name, server_internal);
+        EXCEPTION WHEN OTHERS THEN
+            RAISE EXCEPTION 'Could not create server %: %', server, SQLERRM
+                USING HINT = 'Please clean the left over objects';
+        END;
+    END IF;
+
+    -- Add new options
+    FOR row IN SELECT p.key, p.value from lateral json_each_text(final_config->'server') p
+    LOOP
+        IF NOT EXISTS (
+            WITH a AS (
+                SELECT split_part(unnest(srvoptions), '=', 1) AS options FROM pg_foreign_server WHERE srvname=server_internal
+            ) SELECT * from a where options = row.key)
+        THEN
+            EXECUTE FORMAT('ALTER SERVER %I OPTIONS (ADD %I %L)', server_internal, row.key, row.value);
+        ELSE
+            EXECUTE FORMAT('ALTER SERVER %I OPTIONS (SET %I %L)', server_internal, row.key, row.value);
+        END IF;
+    END LOOP;
+
+    -- Update user mapping settings
+    FOR option IN SELECT o.key, o.value from lateral json_each_text(final_config->'user_mapping') o
+    LOOP
+        IF NOT EXISTS (
+            WITH a AS (
+                SELECT split_part(unnest(umoptions), '=', 1) as options from pg_user_mappings WHERE srvname = server_internal AND usename = role_name
+            ) SELECT * from a where options = option.key)
+        THEN
+            EXECUTE FORMAT('ALTER USER MAPPING FOR %I SERVER %I OPTIONS (ADD %I %L)', role_name, server_internal, option.key, option.value);
+        ELSE
+            EXECUTE FORMAT('ALTER USER MAPPING FOR %I SERVER %I OPTIONS (SET %I %L)', role_name, server_internal, option.key, option.value);
+        END IF;
+    END LOOP;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- Drops a registered server and all the objects associated with it
+-- 
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Server_Unregister(server TEXT)
+RETURNS void
+AS $$
+DECLARE
+    server_internal name := @extschema@.__CDB_FS_Generate_Server_Name(input_name => server, check_existence => true);
+    role_name name := @extschema@.__CDB_FS_Generate_Server_Role_Name(server_internal);
+BEGIN
+    SET client_min_messages = ERROR;
+    BEGIN
+        EXECUTE FORMAT ('DROP USER MAPPING FOR %I SERVER %I', role_name, server_internal);
+        EXECUTE FORMAT ('DROP OWNED BY %I', role_name);
+        EXECUTE FORMAT ('DROP ROLE %I', role_name);
+    EXCEPTION WHEN OTHERS THEN
+        RAISE EXCEPTION 'Not enough permissions to drop the server "%"', server;
+    END;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- List registered servers
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Server_List_Servers(server TEXT DEFAULT '%')
+RETURNS TABLE (
+    name        text,
+    driver      text,
+    host        text,
+    port        text,
+    dbname      text,
+    readmode    text,
+    username    text
+)
+AS $$
+DECLARE
+    server_name text := concat(@extschema@.__CDB_FS_Name_Pattern(), server);
+BEGIN
+    RETURN QUERY SELECT 
+        -- Name as shown to the user
+        @extschema@.__CDB_FS_Extract_Server_Name(s.srvname) AS "Name",
+
+        -- Which driver are we using (postgres_fdw, odbc_fdw...)
+        @extschema@.__CDB_FS_server_type(s.srvname)::text AS "Driver",
+
+        -- Read options from pg_foreign_server
+        (SELECT option_value FROM pg_options_to_table(s.srvoptions) WHERE option_name LIKE 'host') AS "Host",
+        (SELECT option_value FROM pg_options_to_table(s.srvoptions) WHERE option_name LIKE 'port') AS "Port",
+        (SELECT option_value FROM pg_options_to_table(s.srvoptions) WHERE option_name LIKE 'dbname') AS "DBName",
+        CASE WHEN (SELECT NOT option_value::boolean FROM pg_options_to_table(s.srvoptions) WHERE option_name LIKE 'updatable') THEN 'read-only' ELSE 'read-write' END AS "ReadMode",
+
+        @extschema@.__CDB_FS_get_usermapping_username(s.srvname)::text AS "Username"
+    FROM pg_foreign_server s
+    LEFT JOIN pg_user_mappings u
+    ON u.srvid = s.oid
+    WHERE s.srvname ILIKE server_name
+    ORDER BY 1;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL SAFE;
+
+
+--
+-- Grant access to a server
+-- In the future we might consider adding the server's view schema to the role search_path
+-- to make it easier to access the created views
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Server_Grant_Access(server TEXT, db_role NAME)
+RETURNS void
+AS $$
+DECLARE
+    server_internal name := @extschema@.__CDB_FS_Generate_Server_Name(input_name => server, check_existence => true);
+    server_role_name name := @extschema@.__CDB_FS_Generate_Server_Role_Name(server_internal);
+BEGIN
+    IF (db_role IS NULL) THEN
+        RAISE EXCEPTION 'User role "%" cannot be NULL', username;
+    END IF;
+    BEGIN
+        EXECUTE format('GRANT %I TO %I', server_role_name, db_role);
+    EXCEPTION
+    WHEN insufficient_privilege THEN
+        RAISE EXCEPTION 'You do not have rights to grant access on "%"', server;
+    WHEN OTHERS THEN
+        RAISE EXCEPTION 'Could not grant access on "%" to "%": %', server, db_role, SQLERRM;
+    END;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- Revoke access to a server
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Server_Revoke_Access(server TEXT, db_role NAME)
+RETURNS void
+AS $$
+DECLARE
+    server_internal name := @extschema@.__CDB_FS_Generate_Server_Name(input_name => server, check_existence => true);
+    server_role_name name := @extschema@.__CDB_FS_Generate_Server_Role_Name(server_internal);
+BEGIN
+    IF (db_role IS NULL) THEN
+        RAISE EXCEPTION 'User role "%" cannot be NULL', username;
+    END IF;
+    BEGIN
+        EXECUTE format('REVOKE %I FROM %I', server_role_name, db_role);
+    EXCEPTION
+    WHEN insufficient_privilege THEN
+        RAISE EXCEPTION 'You do not have rights to revoke access on "%"', server;
+    WHEN OTHERS THEN
+        RAISE EXCEPTION 'Could not revoke access on "%" to "%": %', server, db_role, SQLERRM;
+    END;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;

scripts-available/CDB_FederatedServerDiagnostics.sql

@@ -0,0 +1,243 @@
+--------------------------------------------------------------------------------
+-- Private functions
+--------------------------------------------------------------------------------
+
+--
+-- Import a foreign table if it does not exist
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Import_If_Not_Exists(server_internal name, remote_schema name, remote_table name)
+RETURNS void
+AS $$
+DECLARE
+    local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, remote_schema);
+BEGIN
+    IF NOT EXISTS (
+        SELECT * FROM pg_class
+        WHERE relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = local_schema)
+        AND relname = remote_table
+    ) THEN
+        EXECUTE format('IMPORT FOREIGN SCHEMA %I LIMIT TO (%I) FROM SERVER %I INTO %I',
+                    remote_schema, remote_table, server_internal, local_schema);
+    END IF;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- Get the version of a remote PG server
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Foreign_Server_Version_PG(server_internal name)
+RETURNS text
+AS $$
+DECLARE
+    remote_schema name := 'pg_catalog';
+    remote_table name := 'pg_settings';
+    local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, remote_schema);
+    remote_server_version text;
+BEGIN
+    PERFORM @extschema@.__CDB_FS_Import_If_Not_Exists(server_internal, remote_schema, remote_table);
+
+    BEGIN
+        EXECUTE format('
+            SELECT setting FROM %I.%I WHERE name = ''server_version'';
+        ', local_schema, remote_table) INTO remote_server_version;
+    EXCEPTION WHEN OTHERS THEN
+        RAISE EXCEPTION 'Not enough permissions to access the server "%"',
+                        @extschema@.__CDB_FS_Extract_Server_Name(server_internal);
+    END;
+
+    RETURN remote_server_version;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+
+--
+-- Get the PostGIS extension version of a remote PG server
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Foreign_PostGIS_Version_PG(server_internal name)
+RETURNS text
+AS $$
+DECLARE
+    remote_schema name := 'pg_catalog';
+    remote_table name := 'pg_extension';
+    local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, remote_schema);
+    remote_postgis_version text;
+BEGIN
+    PERFORM @extschema@.__CDB_FS_Import_If_Not_Exists(server_internal, remote_schema, remote_table);
+
+    BEGIN
+        EXECUTE format('
+            SELECT extversion FROM %I.%I WHERE extname = ''postgis'';
+        ', local_schema, remote_table) INTO remote_postgis_version;
+    EXCEPTION WHEN OTHERS THEN
+        RAISE EXCEPTION 'Not enough permissions to access the server "%"',
+                        @extschema@.__CDB_FS_Extract_Server_Name(server_internal);
+    END;
+
+    RETURN remote_postgis_version;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+
+--
+-- Get the foreign server options of a remote PG server
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Foreign_Server_Options_PG(server_internal name)
+RETURNS jsonb
+AS $$
+    -- See https://www.postgresql.org/docs/current/catalog-pg-foreign-server.html
+    -- See https://www.postgresql.org/docs/current/functions-info.html
+    SELECT jsonb_object_agg(opt.option_name, opt.option_value) FROM (
+        SELECT (pg_options_to_table(srvoptions)).*
+        FROM pg_foreign_server
+        WHERE srvname = server_internal
+    ) AS opt;
+$$
+LANGUAGE SQL VOLATILE PARALLEL UNSAFE;
+
+
+--
+-- Get a foreign PG server hostname from the catalog
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Foreign_Server_Host_PG(server_internal name)
+RETURNS text
+AS $$
+    SELECT option_value FROM (
+        SELECT (pg_options_to_table(srvoptions)).*
+        FROM pg_foreign_server WHERE srvname = server_internal
+    ) AS opt WHERE opt.option_name = 'host';
+$$
+LANGUAGE SQL VOLATILE PARALLEL UNSAFE;
+
+
+--
+-- Get a foreign PG server port from the catalog
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Foreign_Server_Port_PG(server_internal name)
+RETURNS integer
+AS $$
+    SELECT option_value::integer FROM (
+        SELECT (pg_options_to_table(srvoptions)).*
+        FROM pg_foreign_server WHERE srvname = server_internal
+    ) AS opt WHERE opt.option_name = 'port';
+$$
+LANGUAGE SQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- Get one measure of network latency in ms to a remote TCP server
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_TCP_Foreign_Server_Latency(
+    server_internal name,
+    timeout_seconds float DEFAULT 5.0,
+    n_samples integer DEFAULT 10
+)
+RETURNS jsonb
+AS $$
+    import socket
+    import json
+    import math
+    from timeit import default_timer as timer
+
+    plan = plpy.prepare("SELECT @extschema@.__CDB_FS_Foreign_Server_Host_PG($1) AS host", ['name'])
+    rv = plpy.execute(plan, [server_internal], 1)
+    host = rv[0]['host']
+
+    plan = plpy.prepare("SELECT @extschema@.__CDB_FS_Foreign_Server_Port_PG($1) AS port", ['name'])
+    rv = plpy.execute(plan, [server_internal], 1)
+    port = rv[0]['port'] or 5432
+
+    n_errors = 0
+    samples = []
+
+    for i in range(n_samples):
+        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        s.settimeout(timeout_seconds)
+
+        t_start = timer()
+
+        try:
+            s.connect((host, int(port)))
+            t_stop = timer()
+            s.shutdown(socket.SHUT_RD)
+        except (socket.timeout, OSError, socket.error) as ex:
+            plpy.warning('could not connect to server %s:%d, %s' % (host, port, str(ex)))
+            n_errors += 1
+        finally:
+            s.close()
+
+        t_connect = (t_stop - t_start) * 1000.0
+        plpy.debug('TCP connection %s:%d time=%.2f ms' % (host, port, t_connect))
+        samples.append(t_connect)
+
+    stats = {
+        'n_samples': n_samples,
+        'n_errors': n_errors,
+    }
+    n = len(samples)
+    if n >= 1:
+        mean = sum(samples) / n
+        stats.update({
+            'avg': round(mean, 3),
+            'min': round(min(samples), 3),
+            'max': round(max(samples), 3)
+        })
+    if n >= 2:
+        var = sum([ (x - mean)**2 for x in samples ]) / (n-1)
+        stdev = math.sqrt(var)
+        stats.update({
+            'stdev': round(stdev, 3)
+        })
+    return json.dumps(stats)
+$$
+LANGUAGE @@plpythonu@@ VOLATILE PARALLEL UNSAFE;
+
+
+--
+-- Collect and return diagnostics info from a remote PG into a jsonb
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Server_Diagnostics_PG(server_internal name)
+RETURNS jsonb
+AS $$
+DECLARE
+    remote_server_version  text    := @extschema@.__CDB_FS_Foreign_Server_Version_PG(server_internal);
+    remote_postgis_version text    := @extschema@.__CDB_FS_Foreign_PostGIS_Version_PG(server_internal);
+    remote_server_options jsonb    := @extschema@.__CDB_FS_Foreign_Server_Options_PG(server_internal);
+    remote_server_latency_ms jsonb := @extschema@.__CDB_FS_TCP_Foreign_Server_Latency(server_internal);
+BEGIN
+    RETURN jsonb_build_object(
+        'server_version', remote_server_version,
+        'postgis_version', remote_postgis_version,
+        'server_options', remote_server_options,
+        'server_latency_ms', remote_server_latency_ms
+    );
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+
+
+--------------------------------------------------------------------------------
+-- Public functions
+--------------------------------------------------------------------------------
+
+--
+-- Collect and return diagnostics info from a remote PG into a jsonb
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Server_Diagnostics(server TEXT)
+RETURNS jsonb
+AS $$
+DECLARE
+    server_internal name := @extschema@.__CDB_FS_Generate_Server_Name(input_name => server, check_existence => true);
+    server_type name := @extschema@.__CDB_FS_server_type(server_internal);
+BEGIN
+    CASE server_type
+    WHEN 'postgres_fdw' THEN
+        RETURN @extschema@.__CDB_FS_Server_Diagnostics_PG(server_internal);
+    ELSE
+        RAISE EXCEPTION 'Not implemented server type % for remote server %', server_type, server;
+    END CASE;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;

scripts-available/CDB_FederatedServerListRemote.sql

@@ -0,0 +1,298 @@
+--------------------------------------------------------------------------------
+-- Private functions
+--------------------------------------------------------------------------------
+
+--
+-- List the schemas of a remote PG server
+-- 
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_List_Foreign_Schemas_PG(server_internal name)
+RETURNS TABLE(remote_schema name)
+AS $$
+DECLARE
+    -- Import schemata from the information schema
+    --
+    -- "The view schemata contains all schemas in the current database
+    -- that the current user has access to (by way of being the owner
+    -- or having some privilege)."
+    -- See https://www.postgresql.org/docs/11/infoschema-schemata.html
+    --
+    -- "The information schema is defined in the SQL standard and can
+    -- therefore be expected to be portable and remain stable"
+    -- See https://www.postgresql.org/docs/11/information-schema.html
+    inf_schema name := 'information_schema';
+    remote_table name := 'schemata';
+    local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, inf_schema);
+BEGIN
+    -- Import the foreign schemata table
+    IF NOT EXISTS (
+        SELECT * FROM pg_class
+        WHERE relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = local_schema)
+        AND relname = remote_table
+    ) THEN
+        EXECUTE format('IMPORT FOREIGN SCHEMA %I LIMIT TO (%I) FROM SERVER %I INTO %I',
+                    inf_schema, remote_table, server_internal, local_schema);
+    END IF;
+
+    -- Return the result we're interested in. Exclude toast and temp schemas
+    BEGIN
+        RETURN QUERY EXECUTE format('
+            SELECT schema_name::name AS remote_schema FROM %I.%I
+            WHERE schema_name NOT LIKE %s
+            ORDER BY remote_schema
+        ', local_schema, remote_table, '''pg_%''');
+    EXCEPTION WHEN OTHERS THEN
+        RAISE EXCEPTION 'Not enough permissions to access the server "%"',
+                        @extschema@.__CDB_FS_Extract_Server_Name(server_internal);
+    END;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- List the names of the tables in a remote PG schema
+-- 
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_List_Foreign_Tables_PG(server_internal name, remote_schema name)
+RETURNS TABLE(remote_table name)
+AS $func$
+DECLARE
+    -- Import `tables` from the information schema
+    --
+    -- "The view tables contains all tables and views defined in the
+    -- current database. Only those tables and views are shown that
+    -- the current user has access to (by way of being the owner or
+    -- having some privilege)."
+    -- https://www.postgresql.org/docs/11/infoschema-tables.html
+
+    -- Create local target schema if it does not exists
+    inf_schema name := 'information_schema';
+    remote_table name := 'tables';
+    local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, inf_schema);
+BEGIN
+    -- Import the foreign `tables` if not done
+    IF NOT EXISTS (
+        SELECT * FROM pg_class
+        WHERE relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = local_schema)
+        AND relname = remote_table
+    ) THEN
+        EXECUTE format('IMPORT FOREIGN SCHEMA %I LIMIT TO (%I) FROM SERVER %I INTO %I',
+                    inf_schema, remote_table, server_internal, local_schema);
+    END IF;
+
+    -- Note: in this context, schema names are not to be quoted
+    RETURN QUERY EXECUTE format($q$
+        SELECT table_name::name AS remote_table FROM %I.%I WHERE table_schema = '%s' ORDER BY table_name
+        $q$, local_schema, remote_table, remote_schema);
+END
+$func$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+
+--
+-- List the columns in a remote PG schema
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_List_Foreign_Columns_PG(server_internal name, remote_schema name)
+RETURNS TABLE(table_name name, column_name name, column_type text)
+AS $func$
+DECLARE
+    -- Import `columns` from the information schema
+    --
+    -- "The view columns contains information about all table columns (or view columns)
+    -- in the database. System columns (oid, etc.) are not included. Only those columns 
+    -- are shown that the current user has access to (by way of being the owner or having some privilege)."
+    -- https://www.postgresql.org/docs/11/infoschema-columns.html
+
+    -- Create local target schema if it does not exists
+    inf_schema name := 'information_schema';
+    remote_col_table name := 'columns';
+    local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, inf_schema);
+BEGIN
+    -- Import the foreign `columns` if not done
+    IF NOT EXISTS (
+        SELECT * FROM pg_class
+        WHERE relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = local_schema)
+        AND relname = remote_col_table
+    ) THEN
+        EXECUTE format('IMPORT FOREIGN SCHEMA %I LIMIT TO (%I) FROM SERVER %I INTO %I',
+                    inf_schema, remote_col_table, server_internal, local_schema);
+    END IF;
+
+    -- Note: in this context, schema names are not to be quoted
+    -- We join with the geometry columns to change the type `USER-DEFINED` 
+    -- by its appropiate geometry and srid
+    RETURN QUERY EXECUTE format($q$
+        SELECT 
+            a.table_name::name,
+            a.column_name::name,
+            COALESCE(b.column_type, a.data_type)::TEXT as column_type
+        FROM
+            %I.%I a
+        LEFT JOIN
+            @extschema@.__CDB_FS_List_Foreign_Geometry_Columns_PG('%s', '%s') b
+        ON a.table_name = b.table_name AND a.column_name = b.column_name
+        WHERE table_schema = '%s'
+        ORDER BY a.table_name, a.column_name $q$,
+        local_schema, remote_col_table,
+        server_internal, remote_schema,
+        remote_schema);
+END
+$func$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- List the geometry columns in a remote PG schema
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_List_Foreign_Geometry_Columns_PG(server_internal name, remote_schema name, postgis_schema name DEFAULT 'public')
+RETURNS TABLE(table_name name, column_name name, column_type text)
+AS $func$
+DECLARE
+    -- Import `geometry_columns` and `geography_columns` from the postgis schema
+    -- We assume that postgis is installed in the public schema
+
+    -- Create local target schema if it does not exists
+    remote_geometry_view name := 'geometry_columns';
+    remote_geography_view name := 'geography_columns';
+    local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, postgis_schema);
+BEGIN
+    -- Import the foreign `geometry_columns` and `geography_columns` if not done
+    IF NOT EXISTS (
+        SELECT * FROM pg_class
+        WHERE relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = local_schema)
+        AND relname = remote_geometry_view
+    ) THEN
+        EXECUTE format('IMPORT FOREIGN SCHEMA %I LIMIT TO (%I, %I) FROM SERVER %I INTO %I',
+                    postgis_schema, remote_geometry_view, remote_geography_view, server_internal, local_schema);
+    END IF;
+
+    BEGIN
+    -- Note: We return both the type and srid as the type
+        RETURN QUERY EXECUTE format($q$
+            SELECT 
+                f_table_name::NAME as table_name,
+                f_geometry_column::NAME as column_name,
+                type::TEXT || ',' || srid::TEXT as column_type
+            FROM
+            (
+                SELECT * FROM %I.%I UNION ALL SELECT * FROM %I.%I
+            ) _geo_views
+            WHERE f_table_schema = '%s'
+        $q$,
+            local_schema, remote_geometry_view,
+            local_schema, remote_geography_view,
+            remote_schema);
+    EXCEPTION WHEN OTHERS THEN
+        RAISE INFO 'Could not find Postgis installation in the remote "%" schema in server "%"',
+                    postgis_schema, @extschema@.__CDB_FS_Extract_Server_Name(server_internal);
+        RETURN;
+    END;
+END
+$func$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+
+--------------------------------------------------------------------------------
+-- Public functions
+--------------------------------------------------------------------------------
+
+--
+-- List remote schemas in a federated server that the current user has access to.
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Server_List_Remote_Schemas(server TEXT)
+RETURNS TABLE(remote_schema name)
+AS $$
+DECLARE
+    server_internal name := @extschema@.__CDB_FS_Generate_Server_Name(input_name => server, check_existence => true);
+    server_type name := @extschema@.__CDB_FS_server_type(server_internal);
+BEGIN
+    CASE server_type
+    WHEN 'postgres_fdw' THEN
+        RETURN QUERY SELECT @extschema@.__CDB_FS_List_Foreign_Schemas_PG(server_internal);
+    ELSE
+        RAISE EXCEPTION 'Not implemented server type % for remote server %', server_type, server;
+    END CASE;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- List remote tables in a federated server that the current user has access to.
+-- For registered tables it returns also the associated configuration
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Server_List_Remote_Tables(server TEXT, remote_schema TEXT)
+RETURNS TABLE(
+    registered boolean,
+    remote_table TEXT,
+    local_qualified_name TEXT,
+    id_column_name TEXT,
+    geom_column_name TEXT,
+    webmercator_column_name TEXT,
+    columns JSON
+    )
+AS $$
+DECLARE
+    server_internal name := @extschema@.__CDB_FS_Generate_Server_Name(input_name => server, check_existence => true);
+    server_type name := @extschema@.__CDB_FS_server_type(server_internal);
+BEGIN
+    CASE server_type
+    WHEN 'postgres_fdw' THEN
+        RETURN QUERY
+            SELECT
+                coalesce(registered_tables.registered, false)::boolean as registered,
+                foreign_tables.remote_table::text as remote_table,
+                registered_tables.local_qualified_name as local_qualified_name,
+                registered_tables.id_column_name as id_column_name,
+                registered_tables.geom_column_name as geom_column_name,
+                registered_tables.webmercator_column_name as webmercator_column_name,
+                remote_columns.columns as columns
+            FROM
+                @extschema@.__CDB_FS_List_Foreign_Tables_PG(server_internal, remote_schema) foreign_tables
+            LEFT JOIN
+                @extschema@.__CDB_FS_List_Registered_Tables(server_internal, remote_schema) registered_tables
+            ON foreign_tables.remote_table = registered_tables.remote_table
+            LEFT JOIN
+                (   -- Extract and group columns with their remote table
+                    SELECT  table_name,
+                            json_agg(json_build_object('Name', column_name, 'Type', column_type)) as columns
+                    FROM @extschema@.__CDB_FS_List_Foreign_Columns_PG(server_internal, remote_schema)
+                    GROUP BY table_name
+                ) remote_columns
+            ON foreign_tables.remote_table = remote_columns.table_name
+            ORDER BY foreign_tables.remote_table;
+    ELSE
+        RAISE EXCEPTION 'Not implemented server type % for remote server %', server_type, remote_server;
+    END CASE;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- List the columns of a remote table in a federated server that the current user has access to.
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Server_List_Remote_Columns(
+    server TEXT,
+    remote_schema TEXT,
+    remote_table TEXT)
+RETURNS TABLE(column_n name, column_t text)
+AS $$
+DECLARE
+    server_internal name := @extschema@.__CDB_FS_Generate_Server_Name(input_name => server, check_existence => true);
+    server_type name := @extschema@.__CDB_FS_server_type(server_internal);
+BEGIN
+    IF remote_table IS NULL THEN
+        RAISE EXCEPTION 'Remote table name cannot be NULL';
+    END IF;
+
+    CASE server_type
+    WHEN 'postgres_fdw' THEN
+        RETURN QUERY
+        SELECT 
+            column_name,
+            column_type
+        FROM @extschema@.__CDB_FS_List_Foreign_Columns_PG(server_internal, remote_schema)
+        WHERE table_name = remote_table
+        ORDER BY column_name;
+    ELSE
+        RAISE EXCEPTION 'Not implemented server type % for remote server %', server_type, remote_server;
+    END CASE;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;

scripts-available/CDB_FederatedServerTables.sql

@@ -0,0 +1,345 @@
+--------------------------------------------------------------------------------
+-- Private functions
+--------------------------------------------------------------------------------
+
+--
+-- Checks if a column is of integer type
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Column_Is_Integer(input_table REGCLASS, colname NAME)
+RETURNS boolean
+AS $$
+BEGIN
+    PERFORM atttypid FROM pg_catalog.pg_attribute
+       WHERE attrelid = input_table
+         AND attname = colname
+         AND atttypid IN (SELECT oid FROM pg_type
+           WHERE typname IN
+             ('smallint', 'integer', 'bigint', 'int2', 'int4', 'int8'));
+    RETURN FOUND;
+END
+$$
+LANGUAGE PLPGSQL STABLE PARALLEL UNSAFE;
+
+--
+-- Checks if a column is of geometry type
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Column_Is_Geometry(input_table REGCLASS, colname NAME)
+RETURNS boolean
+AS $$
+BEGIN
+    PERFORM atttypid FROM pg_catalog.pg_attribute
+        WHERE attrelid = input_table
+           AND attname = colname
+           AND atttypid = '@postgisschema@.geometry'::regtype;
+    RETURN FOUND;
+END
+$$
+LANGUAGE PLPGSQL STABLE PARALLEL UNSAFE;
+
+--
+-- Returns the name of all the columns from a table
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_GetColumns(input_table REGCLASS)
+RETURNS SETOF NAME
+AS $$
+    SELECT
+        a.attname as "colname"
+    FROM pg_catalog.pg_attribute a
+    WHERE
+        a.attnum > 0
+            AND NOT a.attisdropped
+            AND a.attrelid = (
+                SELECT c.oid
+                FROM pg_catalog.pg_class c
+                LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
+                WHERE c.oid = input_table::oid
+            )
+    ORDER BY a.attnum;
+$$ LANGUAGE SQL STABLE PARALLEL UNSAFE;
+
+--
+-- Returns the id column from a view definition
+-- Note: The id is always of one of this forms:
+-- SELECT t.cartodb_id,
+-- SELECT t.my_id as cartodb_id,
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Get_View_id_column(view_def TEXT)
+RETURNS TEXT
+AS $$
+    WITH column_definitions AS
+    (
+        SELECT regexp_split_to_array(trim(leading from regexp_split_to_table(view_def, '\n')), ' ') AS col_def
+    )
+    SELECT trim(trailing ',' FROM split_part(col_def[2], '.', 2))
+    FROM column_definitions
+    WHERE trim(trailing ',' FROM col_def[array_length(col_def, 1)]) IN ('t.cartodb_id', 'cartodb_id')
+    LIMIT 1;
+$$ LANGUAGE SQL IMMUTABLE PARALLEL SAFE;
+
+--
+-- Returns the geom column from a view definition
+--
+-- Note: The the_geom is always of one of this forms:
+--      t.the_geom,
+--      t.my_geom as the_geom,
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Get_View_geom_column(view_def TEXT)
+RETURNS TEXT
+AS $$
+    WITH column_definitions AS
+    (
+        SELECT regexp_split_to_array(trim(leading from regexp_split_to_table(view_def, '\n')), ' ') AS col_def
+    )
+    SELECT trim(trailing ',' FROM split_part(col_def[1], '.', 2))
+    FROM column_definitions
+    WHERE trim(trailing ',' FROM col_def[array_length(col_def, 1)]) IN ('t.the_geom', 'the_geom')
+    LIMIT 1;
+$$ LANGUAGE SQL IMMUTABLE PARALLEL SAFE;
+
+--
+-- Returns the webmercatorcolumn from a view definition
+-- Note: The the_geom_webmercator is always of one of this forms:
+--      t.the_geom_webmercator,
+--      t.my_geom as the_geom_webmercator,
+-- Or without the trailing comma:
+--      t.the_geom_webmercator
+--      t.my_geom as the_geom_webmercator
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_Get_View_webmercator_column(view_def TEXT)
+RETURNS TEXT
+AS $$
+    WITH column_definitions AS
+    (
+        SELECT regexp_split_to_array(trim(leading from regexp_split_to_table(view_def, '\n')), ' ') AS col_def
+    )
+    SELECT trim(trailing ',' FROM split_part(col_def[1], '.', 2))
+    FROM column_definitions
+    WHERE trim(trailing ',' FROM col_def[array_length(col_def, 1)]) IN ('t.the_geom_webmercator', 'the_geom_webmercator')
+    LIMIT 1;
+$$ LANGUAGE SQL IMMUTABLE PARALLEL SAFE;
+
+
+--
+-- List all registered tables in a server + schema
+--
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_List_Registered_Tables(
+    server_internal NAME,
+    remote_schema TEXT
+    )
+RETURNS TABLE(
+    registered boolean,
+    remote_table TEXT,
+    local_qualified_name TEXT,
+    id_column_name TEXT,
+    geom_column_name TEXT,
+    webmercator_column_name TEXT
+    )
+AS $$
+DECLARE
+    local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, remote_schema);
+BEGIN
+    RETURN QUERY SELECT
+        true as registered,
+        source_table::text as remote_table,
+        format('%I.%I', dependent_schema, dependent_view)::text as local_qualified_name,
+        @extschema@.__CDB_FS_Get_View_id_column(view_definition) as id_column_name,
+        @extschema@.__CDB_FS_Get_View_geom_column(view_definition) as geom_column_name,
+        @extschema@.__CDB_FS_Get_View_webmercator_column(view_definition) as webmercator_column_name
+    FROM
+    (
+        SELECT DISTINCT
+            dependent_ns.nspname as dependent_schema,
+            dependent_view.relname as dependent_view,
+            source_table.relname as source_table,
+            pg_get_viewdef(dependent_view.oid) as view_definition
+        FROM pg_depend
+        JOIN pg_rewrite ON pg_depend.objid = pg_rewrite.oid
+        JOIN pg_class as dependent_view ON pg_rewrite.ev_class = dependent_view.oid
+        JOIN pg_class as source_table ON pg_depend.refobjid = source_table.oid
+        JOIN pg_namespace dependent_ns ON dependent_ns.oid = dependent_view.relnamespace
+        JOIN pg_namespace source_ns ON source_ns.oid = source_table.relnamespace
+        WHERE
+        source_ns.nspname = local_schema
+        ORDER BY 1,2
+    ) _aux;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+
+--------------------------------------------------------------------------------
+-- Public functions
+--------------------------------------------------------------------------------
+
+--
+-- Sets up a Federated Table
+--
+-- Precondition: the federated server has to be set up via
+-- CDB_Federated_Server_Register_PG
+--
+-- Postcondition: it generates a view in the schema of the user that
+-- can be used through SQL and Maps API's.
+-- If the table was already exported, it will be dropped and re-imported
+--
+-- The view is placed under the server's view schema (cdb_fs_$(server_name))
+--
+-- E.g:
+-- SELECT cartodb.CDB_SetUp_PG_Federated_Table(
+--   'amazon',                  -- mandatory, name of the federated server
+--   'my_remote_schema',        -- mandatory, schema name
+--   'my_remote_table',         -- mandatory, table name
+--   'id',                      -- mandatory, name of the id column
+--   'geom',                    -- optional, name of the geom column, preferably in 4326
+--   'webmercator'              -- optional, should be in 3857 if present
+--   'local_name'               -- optional, name of the local view (uses the remote_name if not declared)
+-- );
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Table_Register(
+    server TEXT,
+    remote_schema TEXT,
+    remote_table TEXT,
+    id_column TEXT,
+    geom_column TEXT DEFAULT NULL,
+    webmercator_column TEXT DEFAULT NULL,
+    local_name NAME DEFAULT NULL
+)
+RETURNS void
+AS $$
+DECLARE
+    server_internal name := @extschema@.__CDB_FS_Generate_Server_Name(input_name => server, check_existence => false);
+    local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, remote_schema);
+    role_name name := @extschema@.__CDB_FS_Generate_Server_Role_Name(server_internal);
+
+    src_table REGCLASS; -- import_schema.remote_table  - import_schema is local_schema
+    local_view text;    -- view_schema.local_name      - view_schema is server_internal
+
+    rest_of_cols TEXT[];
+    geom_expression TEXT;
+    webmercator_expression TEXT;
+    carto_columns_expression TEXT[];
+BEGIN
+    IF remote_table IS NULL THEN
+        RAISE EXCEPTION 'Remote table name cannot be NULL';
+    END IF;
+
+    -- Make do with whatever columns are provided
+    IF webmercator_column IS NULL THEN
+        webmercator_column := geom_column;
+    ELSIF geom_column IS NULL THEN
+        geom_column := webmercator_column;
+    END IF;
+
+    IF local_name IS NULL THEN
+        local_name := remote_table;
+    END IF;
+
+    -- Import the foreign table
+    -- Drop the old view / table if there was one
+    IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_schema = local_schema AND table_name = remote_table) THEN
+        EXECUTE @extschema@.CDB_Federated_Table_Unregister(server, remote_schema, remote_table);
+    END IF;
+    BEGIN
+        EXECUTE FORMAT('IMPORT FOREIGN SCHEMA %I LIMIT TO (%I) FROM SERVER %I INTO %I;',
+                        remote_schema, remote_table, server_internal, local_schema);
+    EXCEPTION WHEN OTHERS THEN
+        RAISE EXCEPTION 'Could not import schema "%" of server "%": %', remote_schema, server, SQLERRM;
+    END;
+
+    BEGIN
+        src_table := format('%I.%I', local_schema, remote_table);
+    EXCEPTION WHEN OTHERS THEN
+        RAISE EXCEPTION 'Could not import table "%.%" of server "%"', remote_schema, remote_table, server;
+    END;
+
+    -- Check id_column is numeric
+    IF NOT @extschema@.__CDB_FS_Column_Is_Integer(src_table, id_column) THEN
+        RAISE EXCEPTION 'non integer id_column "%"', id_column;
+    END IF;
+
+    -- Check if the geom and mercator columns have a geometry type (if provided)
+    IF geom_column IS NOT NULL AND NOT @extschema@.__CDB_FS_Column_Is_Geometry(src_table, geom_column) THEN
+        RAISE EXCEPTION 'non geometry column "%"', geom_column;
+    END IF;
+    IF webmercator_column IS NOT NULL AND NOT @extschema@.__CDB_FS_Column_Is_Geometry(src_table, webmercator_column) THEN
+        RAISE EXCEPTION 'non geometry column "%"', webmercator_column;
+    END IF;
+
+    -- Get a list of columns excluding the id, geom and the_geom_webmercator
+    SELECT ARRAY(
+        SELECT quote_ident(c) FROM @extschema@.__CDB_FS_GetColumns(src_table) AS c
+        WHERE c NOT IN (SELECT * FROM (SELECT unnest(ARRAY[id_column, geom_column, webmercator_column, 'cartodb_id', 'the_geom', 'the_geom_webmercator']) col) carto WHERE carto.col IS NOT NULL)
+    ) INTO rest_of_cols;
+
+    IF geom_column IS NULL
+    THEN
+        geom_expression := 'NULL AS the_geom';
+    ELSIF @postgisschema@.Find_SRID(local_schema::varchar, remote_table::varchar, geom_column::varchar) = 4326
+    THEN
+        geom_expression := format('t.%I AS the_geom', geom_column);
+    ELSE
+        -- It needs an ST_Transform to 4326
+        geom_expression := format('@postgisschema@.ST_Transform(t.%I,4326) AS the_geom', geom_column);
+    END IF;
+
+    IF webmercator_column IS NULL
+    THEN
+        webmercator_expression := 'NULL AS the_geom_webmercator';
+    ELSIF @postgisschema@.Find_SRID(local_schema::varchar, remote_table::varchar, webmercator_column::varchar) = 3857
+    THEN
+        webmercator_expression := format('t.%I AS the_geom_webmercator', webmercator_column);
+    ELSE
+        -- It needs an ST_Transform to 3857
+        webmercator_expression := format('@postgisschema@.ST_Transform(t.%I,3857) AS the_geom_webmercator', webmercator_column);
+    END IF;
+
+    -- CARTO columns expressions
+    carto_columns_expression := ARRAY[
+        format('t.%1$I AS cartodb_id', id_column),
+        geom_expression,
+        webmercator_expression
+    ];
+
+    -- Create view schema if it doesn't exist
+    IF NOT EXISTS (SELECT oid FROM pg_namespace WHERE nspname = server_internal) THEN
+        EXECUTE 'CREATE SCHEMA ' || quote_ident(server_internal) || ' AUTHORIZATION ' || quote_ident(role_name);
+    END IF;
+
+    -- Create a view with homogeneous CDB fields
+    BEGIN
+        EXECUTE format(
+            'CREATE OR REPLACE VIEW %1$I.%2$I AS
+                SELECT %3s
+                FROM %4$s t',
+            server_internal, local_name,
+            array_to_string(carto_columns_expression || rest_of_cols, ','),
+            src_table
+        );
+    EXCEPTION WHEN OTHERS THEN
+        IF EXISTS (SELECT to_regclass(format('%1$I.%2$I', server_internal, local_name))) THEN
+            RAISE EXCEPTION 'Could not import table "%" as "%.%" already exists', remote_table, server_internal, local_name;
+        ELSE
+            RAISE EXCEPTION 'Could not import table "%" as "%": %', remote_table, local_name, SQLERRM;
+        END IF;
+    END;
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+--
+-- Unregisters a remote table. Any dependent object will be dropped
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Federated_Table_Unregister(
+    server TEXT,
+    remote_schema TEXT,
+    remote_table TEXT
+)
+RETURNS void
+AS $$
+DECLARE
+    server_internal name := @extschema@.__CDB_FS_Generate_Server_Name(input_name => server, check_existence => false);
+    local_schema name := @extschema@.__CDB_FS_Create_Schema(server_internal, remote_schema);
+BEGIN
+    EXECUTE FORMAT ('DROP FOREIGN TABLE %I.%I CASCADE;', local_schema, remote_table);
+END
+$$
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;

scripts-available/CDB_ForeignTable.sql

@@ -4,7 +4,7 @@
 -- All the FDW settings are read from the `cdb_conf.fdws` entry json file.
 ---------------------------
 
-CREATE OR REPLACE FUNCTION cartodb._CDB_Setup_FDW(fdw_name text, config json)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Setup_FDW(fdw_name text, config json)
 RETURNS void
 AS $$
 DECLARE
@@ -58,58 +58,58 @@ BEGIN
     END IF;
 
     -- Give the organization role usage permisions over the schema
-    SELECT cartodb.CDB_Organization_Member_Group_Role_Member_Name() INTO org_role;
+    SELECT @extschema@.CDB_Organization_Member_Group_Role_Member_Name() INTO org_role;
     EXECUTE FORMAT ('GRANT USAGE ON SCHEMA %I TO %I', fdw_name, org_role);
 
     -- Bring here the remote cdb_tablemetadata
     IF NOT EXISTS ( SELECT * FROM PG_CLASS WHERE relnamespace = (SELECT oid FROM pg_namespace WHERE nspname=fdw_name) and relname='cdb_tablemetadata') THEN
-      EXECUTE FORMAT ('CREATE FOREIGN TABLE %I.cdb_tablemetadata (tabname text, updated_at timestamp with time zone) SERVER %I OPTIONS (table_name ''cdb_tablemetadata_text'', schema_name ''public'', updatable ''false'')', fdw_name, fdw_name);
+      EXECUTE FORMAT ('CREATE FOREIGN TABLE %I.cdb_tablemetadata (tabname text, updated_at timestamp with time zone) SERVER %I OPTIONS (table_name ''cdb_tablemetadata_text'', schema_name ''@extschema@'', updatable ''false'')', fdw_name, fdw_name);
     END IF;
     EXECUTE FORMAT ('GRANT SELECT ON %I.cdb_tablemetadata TO %I', fdw_name, org_role);
 
 END
 $$
-LANGUAGE PLPGSQL;
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
-CREATE OR REPLACE FUNCTION cartodb._CDB_Setup_FDWS()
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Setup_FDWS()
 RETURNS VOID AS 
 $$
 DECLARE
 row record;
 BEGIN
-  FOR row IN SELECT p.key, p.value from lateral json_each(cartodb.CDB_Conf_GetConf('fdws')) p LOOP
-      EXECUTE 'SELECT cartodb._CDB_Setup_FDW($1, $2)' USING row.key, row.value;
+  FOR row IN SELECT p.key, p.value from lateral json_each(@extschema@.CDB_Conf_GetConf('fdws')) p LOOP
+      EXECUTE 'SELECT @extschema@._CDB_Setup_FDW($1, $2)' USING row.key, row.value;
     END LOOP;
   END
 $$
-LANGUAGE PLPGSQL;
+LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 
-CREATE OR REPLACE FUNCTION cartodb._CDB_Setup_FDW(fdw_name text)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Setup_FDW(fdw_name text)
   RETURNS void AS
 $BODY$
 DECLARE
 config json;
 BEGIN
-  SELECT p.value FROM LATERAL json_each(cartodb.CDB_Conf_GetConf('fdws')) p WHERE p.key = fdw_name INTO config;
-  EXECUTE 'SELECT cartodb._CDB_Setup_FDW($1, $2)' USING fdw_name, config;
+  SELECT p.value FROM LATERAL json_each(@extschema@.CDB_Conf_GetConf('fdws')) p WHERE p.key = fdw_name INTO config;
+  EXECUTE 'SELECT @extschema@._CDB_Setup_FDW($1, $2)' USING fdw_name, config;
 END
 $BODY$
-LANGUAGE plpgsql VOLATILE;
+LANGUAGE plpgsql VOLATILE PARALLEL UNSAFE;
 
-CREATE OR REPLACE FUNCTION cartodb.CDB_Add_Remote_Table(source text, table_name text)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Add_Remote_Table(source text, table_name text)
   RETURNS void AS
 $$
 BEGIN
-  PERFORM cartodb._CDB_Setup_FDW(source);
+  PERFORM @extschema@._CDB_Setup_FDW(source);
   EXECUTE FORMAT ('IMPORT FOREIGN SCHEMA %I LIMIT TO (%I) FROM SERVER %I INTO %I;', source, table_name, source, source);
   --- Grant SELECT to publicuser
   EXECUTE FORMAT ('GRANT SELECT ON %I.%I TO publicuser;', source, table_name);
 END
 $$
-LANGUAGE plpgsql;
+LANGUAGE plpgsql VOLATILE PARALLEL UNSAFE;
 
-CREATE OR REPLACE FUNCTION cartodb.CDB_Get_Foreign_Updated_At(foreign_table regclass)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Get_Foreign_Updated_At(foreign_table regclass)
   RETURNS timestamp with time zone AS
 $$
 DECLARE
@@ -125,14 +125,21 @@ BEGIN
 
   -- We assume that the remote cdb_tablemetadata is called cdb_tablemetadata and is on the same schema as the queried table.
   SELECT nspname FROM pg_class c, pg_namespace n WHERE c.oid=foreign_table AND c.relnamespace = n.oid INTO fdw_schema_name;
-  EXECUTE FORMAT('SELECT updated_at FROM %I.cdb_tablemetadata WHERE tabname=%L ORDER BY updated_at DESC LIMIT 1', fdw_schema_name, remote_table_name) INTO time;
+  BEGIN
+    EXECUTE FORMAT('SELECT updated_at FROM %I.cdb_tablemetadata WHERE tabname=%L ORDER BY updated_at DESC LIMIT 1', fdw_schema_name, remote_table_name) INTO time;
+  EXCEPTION
+    WHEN undefined_table THEN
+      -- If you add a GET STACKED DIAGNOSTICS text_var = RETURNED_SQLSTATE
+      -- you get a code 42P01 which corresponds to undefined_table
+      RAISE NOTICE 'CDB_Get_Foreign_Updated_At: could not find %.cdb_tablemetadata while checking % updated_at, returning NULL timestamp', fdw_schema_name, foreign_table;
+  END;
   RETURN time;
 END
 $$
-LANGUAGE plpgsql;
+LANGUAGE plpgsql VOLATILE PARALLEL UNSAFE;
 
 
-CREATE OR REPLACE FUNCTION cartodb._cdb_dbname_of_foreign_table(reloid oid)
+CREATE OR REPLACE FUNCTION @extschema@._cdb_dbname_of_foreign_table(reloid oid)
 RETURNS TEXT AS $$
     SELECT option_value FROM pg_options_to_table((
 
@@ -142,25 +149,25 @@ RETURNS TEXT AS $$
         WHERE ft.ftrelid = reloid
 
     )) WHERE option_name='dbname';
-$$ LANGUAGE SQL;
+$$ LANGUAGE SQL VOLATILE PARALLEL UNSAFE;
 
 
 -- Return a set of (dbname, schema_name, table_name, updated_at)
 -- It is aware of foreign tables
 -- It assumes the local (schema_name, table_name) map to the remote ones with the same name
 -- Note: dbname is never quoted whereas schema and table names are when needed.
-CREATE OR REPLACE FUNCTION cartodb.CDB_QueryTables_Updated_At(query text)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_QueryTables_Updated_At(query text)
 RETURNS TABLE(dbname text, schema_name text, table_name text, updated_at timestamptz)
 AS $$
     WITH query_tables AS (
-      SELECT unnest(CDB_QueryTablesText(query)) schema_table_name
+      SELECT unnest(@extschema@.CDB_QueryTablesText(query)) schema_table_name
     ), query_tables_oid AS (
       SELECT schema_table_name, schema_table_name::regclass::oid AS reloid
       FROM query_tables
     ),
     fqtn AS (
       SELECT
-        (CASE WHEN c.relkind = 'f' THEN cartodb._cdb_dbname_of_foreign_table(query_tables_oid.reloid)
+        (CASE WHEN c.relkind = 'f' THEN @extschema@._cdb_dbname_of_foreign_table(query_tables_oid.reloid)
               ELSE current_database()
          END)::text AS dbname,
          quote_ident(n.nspname::text) schema_name,
@@ -172,17 +179,17 @@ AS $$
       WHERE c.oid = query_tables_oid.reloid
     )
     SELECT fqtn.dbname, fqtn.schema_name, fqtn.table_name,
-      (CASE WHEN relkind = 'f' THEN cartodb.CDB_Get_Foreign_Updated_At(reloid)
-            ELSE (SELECT md.updated_at FROM CDB_TableMetadata md WHERE md.tabname = reloid)
+      (CASE WHEN relkind = 'f' THEN @extschema@.CDB_Get_Foreign_Updated_At(reloid)
+            ELSE (SELECT md.updated_at FROM @extschema@.CDB_TableMetadata md WHERE md.tabname = reloid)
       END) AS updated_at
     FROM fqtn;
-$$ LANGUAGE SQL;
+$$ LANGUAGE SQL VOLATILE PARALLEL UNSAFE;
 
 
 -- Return the last updated time of a set of tables
 -- It is aware of foreign tables
 -- It assumes the local (schema_name, table_name) map to the remote ones with the same name
-CREATE OR REPLACE FUNCTION cartodb.CDB_Last_Updated_Time(tables text[])
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Last_Updated_Time(tables text[])
 RETURNS timestamptz AS $$
     WITH t AS (
         SELECT unnest(tables) AS schema_table_name
@@ -190,10 +197,19 @@ RETURNS timestamptz AS $$
         SELECT (t.schema_table_name)::regclass::oid as reloid FROM t
     ), t_updated_at AS (
         SELECT
-            (CASE WHEN relkind = 'f' THEN cartodb.CDB_Get_Foreign_Updated_At(reloid)
-                  ELSE (SELECT md.updated_at FROM CDB_TableMetadata md WHERE md.tabname = reloid)
+            (CASE WHEN relkind = 'f' THEN @extschema@.CDB_Get_Foreign_Updated_At(reloid)
+                  ELSE (SELECT md.updated_at FROM @extschema@.CDB_TableMetadata md WHERE md.tabname = reloid)
              END) AS updated_at
         FROM t_oid
         LEFT JOIN pg_catalog.pg_class c ON c.oid = reloid
     ) SELECT max(updated_at) FROM t_updated_at;
-$$ LANGUAGE SQL;
+$$ LANGUAGE SQL VOLATILE PARALLEL UNSAFE;
+
+
+--------------------------------------------------------------------------------
+-- Deprecated
+--------------------------------------------------------------------------------
+DROP FUNCTION IF EXISTS @extschema@.__CDB_User_FDW_Object_Names(name);
+DROP FUNCTION IF EXISTS @extschema@._CDB_SetUp_User_PG_FDW_Server(name, json);
+DROP FUNCTION IF EXISTS @extschema@._CDB_Drop_User_PG_FDW_Server(name, boolean);
+DROP FUNCTION IF EXISTS @extschema@.CDB_SetUp_User_PG_FDW_Table(name, name, name);

scripts-available/CDB_GhostTables.sql

@@ -0,0 +1,159 @@
+-- Enqueues a job to run Ghost tables linking process for the provided username
+CREATE OR REPLACE FUNCTION @extschema@._CDB_LinkGhostTables(username text, db_name text, event_name text) 
+RETURNS void
+AS $$
+  if not username:
+    return
+
+  if 'json' not in GD:
+    import json
+    GD['json'] = json
+  else:
+    json = GD['json']    
+
+  tis_config = plpy.execute("select @extschema@.CDB_Conf_GetConf('invalidation_service');")[0]['cdb_conf_getconf']
+  if not tis_config:
+    plpy.warning('Invalidation service configuration not found. Skipping Ghost Tables linking.')
+    return
+
+  tis_config_dict = json.loads(tis_config)
+  tis_host = tis_config_dict.get('host')
+  tis_port = tis_config_dict.get('port')
+  tis_timeout = tis_config_dict.get('timeout', 5)
+  tis_retry = tis_config_dict.get('retry', 5)
+      
+  client = GD.get('invalidation', None)
+
+  while True:
+
+    if not client:
+        try:
+          import redis
+          client = redis.Redis(host=tis_host, port=tis_port, socket_timeout=tis_timeout)
+          GD['invalidation'] = client
+        except Exception as err:
+          # NOTE: no retries on connection error
+          plpy.warning('Error trying to connect to Invalidation Service to link Ghost Tables: ' +  str(err))
+          break
+
+    try:
+      client.execute_command('DBSCH', db_name, username, event_name)
+      break
+    except Exception as err:
+      client = GD['invalidation'] = None # force reconnect
+      if not tis_retry:
+        plpy.warning('Error calling Invalidation Service to link Ghost Tables: ' +  str(err))
+        break
+      tis_retry -= 1 # try reconnecting
+$$ LANGUAGE '@@plpythonu@@' VOLATILE PARALLEL UNSAFE;
+
+-- Enqueues a job to run Ghost tables linking process for the current user
+CREATE OR REPLACE FUNCTION @extschema@.CDB_LinkGhostTables(event_name text DEFAULT 'USER')
+RETURNS void
+AS $$
+  DECLARE
+    username TEXT;
+    db_name TEXT;
+  BEGIN
+    EXECUTE 'SELECT @extschema@.CDB_Username();' INTO username;
+    EXECUTE 'SELECT current_database();' INTO db_name;
+
+    PERFORM @extschema@._CDB_LinkGhostTables(username, db_name, event_name);
+    RAISE INFO '_CDB_LinkGhostTables() called with username=%, event_name=%', username, event_name;
+  END;
+$$  LANGUAGE plpgsql
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
+
+-- Trigger function to call CDB_LinkGhostTables()
+CREATE OR REPLACE FUNCTION @extschema@._CDB_LinkGhostTablesTrigger()
+RETURNS trigger
+AS $$
+  DECLARE
+    ddl_tag TEXT;
+  BEGIN
+    EXECUTE 'DELETE FROM @extschema@.cdb_ddl_execution WHERE txid = txid_current() RETURNING tag;' INTO ddl_tag;
+    PERFORM @extschema@.CDB_LinkGhostTables(ddl_tag);
+    RETURN NULL;
+  END;
+$$  LANGUAGE plpgsql
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
+
+-- Event trigger to save the current transaction in @extschema@.cdb_ddl_execution
+CREATE OR REPLACE FUNCTION @extschema@.CDB_SaveDDLTransaction()
+RETURNS event_trigger
+AS $$
+  BEGIN
+    INSERT INTO @extschema@.cdb_ddl_execution VALUES (txid_current(), tg_tag) ON CONFLICT ON CONSTRAINT cdb_ddl_execution_pkey DO NOTHING;
+  END;
+$$  LANGUAGE plpgsql
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
+
+-- Creates the trigger on DDL events to link ghost tables
+CREATE OR REPLACE FUNCTION @extschema@.CDB_EnableGhostTablesTrigger()
+RETURNS void
+AS $$
+  BEGIN
+    DROP EVENT TRIGGER IF EXISTS link_ghost_tables;
+    DROP TRIGGER IF EXISTS check_ddl_update ON @extschema@.cdb_ddl_execution;
+
+    -- Table to store the transaction id from DDL events to avoid multiple executions
+    CREATE TABLE IF NOT EXISTS @extschema@.cdb_ddl_execution(txid bigint PRIMARY KEY, tag text);
+
+    CREATE CONSTRAINT TRIGGER check_ddl_update
+    AFTER INSERT ON @extschema@.cdb_ddl_execution
+    INITIALLY DEFERRED
+    FOR EACH ROW
+    EXECUTE PROCEDURE @extschema@._CDB_LinkGhostTablesTrigger();
+
+    CREATE EVENT TRIGGER link_ghost_tables
+    ON ddl_command_end
+    WHEN TAG IN ('CREATE TABLE',
+                'SELECT INTO',
+                'DROP TABLE',
+                'ALTER TABLE',
+
+                'CREATE TRIGGER',
+                'DROP TRIGGER',
+                'ALTER TRIGGER',
+
+                'CREATE VIEW',
+                'DROP VIEW',
+                'ALTER VIEW',
+
+                'CREATE FOREIGN TABLE',
+                'ALTER FOREIGN TABLE',
+                'DROP FOREIGN TABLE',
+
+                'ALTER MATERIALIZED VIEW',
+                'CREATE MATERIALIZED VIEW',
+                'DROP MATERIALIZED VIEW',
+
+                'IMPORT FOREIGN SCHEMA',
+
+                'DROP EXTENSION',
+                'DROP SCHEMA',
+                'DROP SERVER',
+                'DROP TYPE')
+    EXECUTE PROCEDURE @extschema@.CDB_SaveDDLTransaction();
+  END;
+$$ LANGUAGE plpgsql VOLATILE PARALLEL UNSAFE;
+
+-- Drops the trigger on DDL events to link ghost tables
+CREATE OR REPLACE FUNCTION @extschema@.CDB_DisableGhostTablesTrigger()
+RETURNS void
+AS $$
+  BEGIN
+    DROP EVENT TRIGGER IF EXISTS link_ghost_tables;
+    DROP TRIGGER IF EXISTS check_ddl_update ON @extschema@.cdb_ddl_execution;
+    DROP TABLE IF EXISTS @extschema@.cdb_ddl_execution;
+  END;
+$$ LANGUAGE plpgsql VOLATILE PARALLEL UNSAFE;

scripts-available/CDB_GreatCircle.sql

@@ -1,26 +1,26 @@
 -- Great circle point-to-point routes, based on:
 --   http://blog.cartodb.com/jets-and-datelines/
 --
-CREATE OR REPLACE FUNCTION CDB_GreatCircle(start_point geometry, end_point geometry, max_segment_length NUMERIC DEFAULT 100000)
-RETURNS geometry AS $$
+CREATE OR REPLACE FUNCTION @extschema@.CDB_GreatCircle(start_point @postgisschema@.geometry, end_point @postgisschema@.geometry, max_segment_length NUMERIC DEFAULT 100000)
+RETURNS @postgisschema@.geometry AS $$
 DECLARE
-  line geometry;
+  line @postgisschema@.geometry;
 BEGIN
-  line = ST_Segmentize(
-    ST_Makeline(
+  line = @postgisschema@.ST_Segmentize(
+    @postgisschema@.ST_Makeline(
       start_point,
       end_point
     )::geography,
     max_segment_length
   )::geometry;
 
-  IF ST_XMax(line) - ST_XMin(line) > 180 THEN
-    line = ST_Difference(
-      ST_Shift_Longitude(line),
-			ST_Buffer(ST_GeomFromText('LINESTRING(180 90, 180 -90)', 4326), 0.00001)
+  IF @postgisschema@.ST_XMax(line) - @postgisschema@.ST_XMin(line) > 180 THEN
+    line = @postgisschema@.ST_Difference(
+      @postgisschema@.ST_ShiftLongitude(line),
+			@postgisschema@.ST_Buffer(@postgisschema@.ST_GeomFromText('LINESTRING(180 90, 180 -90)', 4326), 0.00001)
 		);
   END IF;
 RETURN line;
 END;
 $$
-LANGUAGE 'plpgsql';
+LANGUAGE 'plpgsql' IMMUTABLE STRICT PARALLEL SAFE;

scripts-available/CDB_Groups.sql

@@ -6,16 +6,16 @@
 
 -- Creates a new group
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Group_CreateGroup(group_name text)
+FUNCTION @extschema@.CDB_Group_CreateGroup(group_name text)
     RETURNS VOID AS $$
 DECLARE
     group_role TEXT;
 BEGIN
-    group_role := cartodb._CDB_Group_GroupRole(group_name);
+    group_role := @extschema@._CDB_Group_GroupRole(group_name);
     EXECUTE format('CREATE ROLE %I NOLOGIN;', group_role);
-    PERFORM cartodb._CDB_Group_CreateGroup_API(group_name, group_role);
+    PERFORM @extschema@._CDB_Group_CreateGroup_API(group_name, group_role);
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Drops group and everything that role owns
 -- TODO: LIMITATION: in order to drop a role all its owned objects must be dropped before.
@@ -23,74 +23,74 @@ $$ LANGUAGE PLPGSQL VOLATILE;
 -- Not even the role creator can drop the role and the objects it owns.
 -- All group owned objects by the group are permissions.
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Group_DropGroup(group_name text)
+FUNCTION @extschema@.CDB_Group_DropGroup(group_name text)
     RETURNS VOID AS $$
 DECLARE
     group_role TEXT;
 BEGIN
-    group_role := cartodb._CDB_Group_GroupRole(group_name);
+    group_role := @extschema@._CDB_Group_GroupRole(group_name);
     EXECUTE format('DROP OWNED BY %I', group_role);
     EXECUTE format('DROP ROLE IF EXISTS %I', group_role);
-    PERFORM cartodb._CDB_Group_DropGroup_API(group_name);
+    PERFORM @extschema@._CDB_Group_DropGroup_API(group_name);
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Renames a group
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Group_RenameGroup(old_group_name text, new_group_name text)
+FUNCTION @extschema@.CDB_Group_RenameGroup(old_group_name text, new_group_name text)
     RETURNS VOID AS $$
 DECLARE
     old_group_role TEXT;
     new_group_role TEXT;
 BEGIN
-    old_group_role = cartodb._CDB_Group_GroupRole(old_group_name);
-    new_group_role = cartodb._CDB_Group_GroupRole(new_group_name);
+    old_group_role = @extschema@._CDB_Group_GroupRole(old_group_name);
+    new_group_role = @extschema@._CDB_Group_GroupRole(new_group_name);
     EXECUTE format('ALTER ROLE %I RENAME TO %I', old_group_role, new_group_role);
-    PERFORM cartodb._CDB_Group_RenameGroup_API(old_group_name, new_group_name, new_group_role);
+    PERFORM @extschema@._CDB_Group_RenameGroup_API(old_group_name, new_group_name, new_group_role);
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Adds users to a group
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Group_AddUsers(group_name text, usernames text[])
+FUNCTION @extschema@.CDB_Group_AddUsers(group_name text, usernames text[])
     RETURNS VOID AS $$
 DECLARE
     group_role TEXT;
     user_role TEXT;
     username TEXT;
 BEGIN
-    group_role := cartodb._CDB_Group_GroupRole(group_name);
+    group_role := @extschema@._CDB_Group_GroupRole(group_name);
     foreach username in array usernames
     loop
-      user_role := cartodb._CDB_User_RoleFromUsername(username);
+      user_role := @extschema@._CDB_User_RoleFromUsername(username);
       IF(group_role IS NULL OR user_role IS NULL)
       THEN
         RAISE EXCEPTION 'Group role (%) and user role (%) must be already existing', group_role, user_role;
       END IF;
       EXECUTE format('GRANT %I TO %I', group_role, user_role);
     end loop;
-    PERFORM cartodb._CDB_Group_AddUsers_API(group_name, usernames);
+    PERFORM @extschema@._CDB_Group_AddUsers_API(group_name, usernames);
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Removes users from a group
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Group_RemoveUsers(group_name text, usernames text[])
+FUNCTION @extschema@.CDB_Group_RemoveUsers(group_name text, usernames text[])
     RETURNS VOID AS $$
 DECLARE
     group_role TEXT;
     user_role TEXT;
     username TEXT;
 BEGIN
-    group_role := cartodb._CDB_Group_GroupRole(group_name);
+    group_role := @extschema@._CDB_Group_GroupRole(group_name);
     foreach username in array usernames
     loop
-      user_role := cartodb._CDB_User_RoleFromUsername(username);
+      user_role := @extschema@._CDB_User_RoleFromUsername(username);
       EXECUTE format('REVOKE %I FROM %I', group_role, user_role);
     end loop;
-    PERFORM cartodb._CDB_Group_RemoveUsers_API(group_name, usernames);
+    PERFORM @extschema@._CDB_Group_RemoveUsers_API(group_name, usernames);
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 ----------------------------------
 -- TABLE MANAGEMENT FUNCTIONS
@@ -100,67 +100,67 @@ $$ LANGUAGE PLPGSQL VOLATILE;
 
 -- Grants table read permission to a group
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Group_Table_GrantRead(group_name text, username text, table_name text)
+FUNCTION @extschema@.CDB_Group_Table_GrantRead(group_name text, username text, table_name text)
     RETURNS VOID AS $$
 DECLARE
     group_role TEXT;
 BEGIN
-    PERFORM cartodb._CDB_Group_Table_GrantRead(group_name, username, table_name, true);
+    PERFORM @extschema@._CDB_Group_Table_GrantRead(group_name, username, table_name, true);
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_Table_GrantRead(group_name text, username text, table_name text, sync boolean)
+FUNCTION @extschema@._CDB_Group_Table_GrantRead(group_name text, username text, table_name text, sync boolean)
     RETURNS VOID AS $$
 DECLARE
     group_role TEXT;
 BEGIN
-    group_role := cartodb._CDB_Group_GroupRole(group_name);
+    group_role := @extschema@._CDB_Group_GroupRole(group_name);
     EXECUTE format('GRANT USAGE ON SCHEMA %I TO %I', username, group_role);
     EXECUTE format('GRANT SELECT ON TABLE %I.%I TO %I', username, table_name, group_role );
     IF(sync) THEN
-      PERFORM cartodb._CDB_Group_Table_GrantPermission_API(group_name, username, table_name, 'r');
+      PERFORM @extschema@._CDB_Group_Table_GrantPermission_API(group_name, username, table_name, 'r');
     END IF;
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Grants table write permission to a group
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Group_Table_GrantReadWrite(group_name text, username text, table_name text)
+FUNCTION @extschema@.CDB_Group_Table_GrantReadWrite(group_name text, username text, table_name text)
     RETURNS VOID AS $$
 DECLARE
     group_role TEXT;
 BEGIN
-    PERFORM cartodb._CDB_Group_Table_GrantReadWrite(group_name, username, table_name, true);
+    PERFORM @extschema@._CDB_Group_Table_GrantReadWrite(group_name, username, table_name, true);
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_Table_GrantReadWrite(group_name text, username text, table_name text, sync boolean)
+FUNCTION @extschema@._CDB_Group_Table_GrantReadWrite(group_name text, username text, table_name text, sync boolean)
     RETURNS VOID AS $$
 DECLARE
     group_role TEXT;
 BEGIN
-    group_role := cartodb._CDB_Group_GroupRole(group_name);
+    group_role := @extschema@._CDB_Group_GroupRole(group_name);
     EXECUTE format('GRANT USAGE ON SCHEMA %I TO %I', username, group_role);
     EXECUTE format('GRANT SELECT, INSERT, UPDATE, DELETE ON TABLE %I.%I TO %I', username, table_name, group_role);
-    PERFORM cartodb._CDB_Group_TableSequences_Permission(group_name, username, table_name, true);
+    PERFORM @extschema@._CDB_Group_TableSequences_Permission(group_name, username, table_name, true);
     IF(sync) THEN
-      PERFORM cartodb._CDB_Group_Table_GrantPermission_API(group_name, username, table_name, 'w');
+      PERFORM @extschema@._CDB_Group_Table_GrantPermission_API(group_name, username, table_name, 'w');
     END IF;
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Granting and revoking permissions on sequences
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_TableSequences_Permission(group_name text, username text, table_name text, do_grant bool)
+FUNCTION @extschema@._CDB_Group_TableSequences_Permission(group_name text, username text, table_name text, do_grant bool)
     RETURNS VOID AS $$
 DECLARE
     column_name TEXT;
     sequence_name TEXT;
     group_role TEXT;
 BEGIN
-    group_role := cartodb._CDB_Group_GroupRole(group_name);
+    group_role := @extschema@._CDB_Group_GroupRole(group_name);
     FOR column_name IN EXECUTE 'SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_CATALOG = current_database() AND TABLE_SCHEMA = $1 AND TABLE_NAME = $2 AND COLUMN_DEFAULT LIKE ''nextval%''' USING username, table_name
     LOOP
         EXECUTE format('SELECT PG_GET_SERIAL_SEQUENCE(''%I.%I'', ''%I'')', username, table_name, column_name) INTO sequence_name;
@@ -175,47 +175,47 @@ BEGIN
     END LOOP;
     RETURN;
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Revokes all permissions on a table from a group
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Group_Table_RevokeAll(group_name text, username text, table_name text)
+FUNCTION @extschema@.CDB_Group_Table_RevokeAll(group_name text, username text, table_name text)
     RETURNS VOID AS $$
 DECLARE
     group_role TEXT;
 BEGIN
-    PERFORM cartodb._CDB_Group_Table_RevokeAll(group_name, username, table_name, true);
+    PERFORM @extschema@._CDB_Group_Table_RevokeAll(group_name, username, table_name, true);
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_Table_RevokeAll(group_name text, username text, table_name text, sync boolean)
+FUNCTION @extschema@._CDB_Group_Table_RevokeAll(group_name text, username text, table_name text, sync boolean)
     RETURNS VOID AS $$
 DECLARE
     group_role TEXT;
 BEGIN
-    group_role := cartodb._CDB_Group_GroupRole(group_name);
+    group_role := @extschema@._CDB_Group_GroupRole(group_name);
     EXECUTE format('REVOKE ALL ON TABLE %I.%I FROM %I', username, table_name, group_role);
-    PERFORM cartodb._CDB_Group_TableSequences_Permission(group_name, username, table_name, false);
+    PERFORM @extschema@._CDB_Group_TableSequences_Permission(group_name, username, table_name, false);
     IF(sync) THEN
-      PERFORM cartodb._CDB_Group_Table_RevokeAllPermission_API(group_name, username, table_name);
+      PERFORM @extschema@._CDB_Group_Table_RevokeAllPermission_API(group_name, username, table_name);
     END IF;
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -----------------------
 -- Helper functions
 -----------------------
 -- Given a group name returns a role. group_name must be a valid PostgreSQL idenfifier. See http://www.postgresql.org/docs/9.2/static/sql-syntax-lexical.html#SQL-SYNTAX-IDENTIFIERS
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_GroupRole(group_name text)
+FUNCTION @extschema@._CDB_Group_GroupRole(group_name text)
     RETURNS TEXT AS $$
 DECLARE
     group_role TEXT;
     prefix TEXT;
     max_length constant INTEGER := 63;
 BEGIN
-    prefix = format('%s_g_', cartodb._CDB_Group_ShortDatabaseName());
+    prefix = format('%s_g_', @extschema@._CDB_Group_ShortDatabaseName());
     group_role := format('%s%s', prefix, group_name);
     IF LENGTH(group_role) > max_length
     THEN
@@ -223,11 +223,11 @@ BEGIN
     END IF;
     RETURN group_role;
 END
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL STABLE PARALLEL SAFE;
 
 -- Returns the first owner of the schema matching username. Organization user schemas must have one only owner.
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_User_RoleFromUsername(username text)
+FUNCTION @extschema@._CDB_User_RoleFromUsername(username text)
     RETURNS TEXT AS $$
 DECLARE
     user_role TEXT;
@@ -237,11 +237,11 @@ BEGIN
     SELECT pg_get_userbyid(nspowner) FROM pg_namespace WHERE nspname = username INTO user_role;
     RETURN user_role;
 END
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL STABLE PARALLEL SAFE;
 
 -- Database names are too long, we need a shorter version for composing role names
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_ShortDatabaseName()
+FUNCTION @extschema@._CDB_Group_ShortDatabaseName()
     RETURNS TEXT AS $$
 DECLARE
     short_database_name TEXT;
@@ -249,4 +249,4 @@ BEGIN
     SELECT md5(current_database()) INTO short_database_name;
     RETURN short_database_name;
 END
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL STABLE PARALLEL SAFE;

scripts-available/CDB_Groups_API.sql

@@ -2,130 +2,175 @@
 -- GROUP METADATA API FUNCTIONS
 --
 -- Meant to be used by CDB_Group_* functions to sync data with the editor.
--- Requires configuration parameter. Example: SELECT cartodb.CDB_Conf_SetConf('groups_api', '{ "host": "127.0.0.1", "port": 3000, "timeout": 10, "username": "extension", "password": "elephant" }');
+-- Requires configuration parameter. Example: SELECT @extschema@.CDB_Conf_SetConf('groups_api', '{ "host": "127.0.0.1", "port": 3000, "timeout": 10, "username": "extension", "password": "elephant" }');
 ----------------------------------
 
--- TODO: delete this development cleanup before final merge
-DROP FUNCTION IF EXISTS cartodb.CDB_Group_AddMember(group_name text, username text);
-DROP FUNCTION IF EXISTS cartodb.CDB_Group_RemoveMember(group_name text, username text);
-DROP FUNCTION IF EXISTS cartodb._CDB_Group_AddMember_API(group_name text, username text);
-DROP FUNCTION IF EXISTS cartodb._CDB_Group_RemoveMember_API(group_name text, username text);
+DROP FUNCTION IF EXISTS @extschema@.CDB_Group_AddMember(group_name text, username text);
+DROP FUNCTION IF EXISTS @extschema@.CDB_Group_RemoveMember(group_name text, username text);
+DROP FUNCTION IF EXISTS @extschema@._CDB_Group_AddMember_API(group_name text, username text);
+DROP FUNCTION IF EXISTS @extschema@._CDB_Group_RemoveMember_API(group_name text, username text);
 
 -- Sends the create group request
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_CreateGroup_API(group_name text, group_role text)
+FUNCTION @extschema@._CDB_Group_CreateGroup_API(group_name text, group_role text)
     RETURNS VOID AS
 $$
     import string
 
     url = '/api/v1/databases/{0}/groups'
     body = '{ "name": "%s", "database_role": "%s" }' % (group_name, group_role)
-    query = "select cartodb._CDB_Group_API_Request('POST', '%s', '%s', '{200, 409}') as response_status" % (url, body)
+    query = "select @extschema@._CDB_Group_API_Request('POST', '%s', '%s', '{200, 409}') as response_status" % (url, body)
     plpy.execute(query)
-$$ LANGUAGE 'plpythonu' VOLATILE SECURITY DEFINER;
+$$  LANGUAGE '@@plpythonu@@'
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
 
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_DropGroup_API(group_name text)
+FUNCTION @extschema@._CDB_Group_DropGroup_API(group_name text)
     RETURNS VOID AS
 $$
     import string
-    import urllib
+    try:
+        from urllib import pathname2url
+    except:
+        from urllib.request import pathname2url
 
-    url = '/api/v1/databases/{0}/groups/%s' % (urllib.pathname2url(group_name))
+    url = '/api/v1/databases/{0}/groups/%s' % (pathname2url(group_name))
 
-    query = "select cartodb._CDB_Group_API_Request('DELETE', '%s', '', '{204, 404}') as response_status" % url
+    query = "select @extschema@._CDB_Group_API_Request('DELETE', '%s', '', '{204, 404}') as response_status" % url
     plpy.execute(query)
-$$ LANGUAGE 'plpythonu' VOLATILE SECURITY DEFINER;
+$$  LANGUAGE '@@plpythonu@@'
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
 
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_RenameGroup_API(old_group_name text, new_group_name text, new_group_role text)
+FUNCTION @extschema@._CDB_Group_RenameGroup_API(old_group_name text, new_group_name text, new_group_role text)
     RETURNS VOID AS
 $$
     import string
-    import urllib
+    try:
+        from urllib import pathname2url
+    except:
+        from urllib.request import pathname2url
 
-    url = '/api/v1/databases/{0}/groups/%s' % (urllib.pathname2url(old_group_name))
+    url = '/api/v1/databases/{0}/groups/%s' % (pathname2url(old_group_name))
     body = '{ "name": "%s", "database_role": "%s" }' % (new_group_name, new_group_role)
-    query = "select cartodb._CDB_Group_API_Request('PUT', '%s', '%s', '{200, 409}') as response_status" % (url, body)
+    query = "select @extschema@._CDB_Group_API_Request('PUT', '%s', '%s', '{200, 409}') as response_status" % (url, body)
     plpy.execute(query)
-$$ LANGUAGE 'plpythonu' VOLATILE SECURITY DEFINER;
+$$  LANGUAGE '@@plpythonu@@'
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
 
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_AddUsers_API(group_name text, usernames text[])
+FUNCTION @extschema@._CDB_Group_AddUsers_API(group_name text, usernames text[])
     RETURNS VOID AS
 $$
     import string
-    import urllib
+    try:
+        from urllib import pathname2url
+    except:
+        from urllib.request import pathname2url
 
-    url = '/api/v1/databases/{0}/groups/%s/users' % (urllib.pathname2url(group_name))
+    url = '/api/v1/databases/{0}/groups/%s/users' % (pathname2url(group_name))
     body = "{ \"users\": [\"%s\"] }" % "\",\"".join(usernames)
-    query = "select cartodb._CDB_Group_API_Request('POST', '%s', '%s', '{200, 409}') as response_status" % (url, body)
+    query = "select @extschema@._CDB_Group_API_Request('POST', '%s', '%s', '{200, 409}') as response_status" % (url, body)
     plpy.execute(query)
-$$ LANGUAGE 'plpythonu' VOLATILE SECURITY DEFINER;
+$$  LANGUAGE '@@plpythonu@@'
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
 
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_RemoveUsers_API(group_name text, usernames text[])
+FUNCTION @extschema@._CDB_Group_RemoveUsers_API(group_name text, usernames text[])
     RETURNS VOID AS
 $$
     import string
-    import urllib
+    try:
+        from urllib import pathname2url
+    except:
+        from urllib.request import pathname2url
 
-    url = '/api/v1/databases/{0}/groups/%s/users' % (urllib.pathname2url(group_name))
+    url = '/api/v1/databases/{0}/groups/%s/users' % (pathname2url(group_name))
     body = "{ \"users\": [\"%s\"] }" % "\",\"".join(usernames)
-    query = "select cartodb._CDB_Group_API_Request('DELETE', '%s', '%s', '{200, 404}') as response_status" % (url, body)
+    query = "select @extschema@._CDB_Group_API_Request('DELETE', '%s', '%s', '{200, 404}') as response_status" % (url, body)
     plpy.execute(query)
-$$ LANGUAGE 'plpythonu' VOLATILE SECURITY DEFINER;
+$$  LANGUAGE '@@plpythonu@@'
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
 
 DO LANGUAGE 'plpgsql' $$
 BEGIN
     -- Needed for dropping type
-    DROP FUNCTION IF EXISTS cartodb._CDB_Group_API_Conf();
-    DROP TYPE IF EXISTS _CDB_Group_API_Params;
+    DROP FUNCTION IF EXISTS @extschema@._CDB_Group_API_Conf();
+    DROP TYPE IF EXISTS @extschema@._CDB_Group_API_Params;
 END
 $$;
 
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_Table_GrantPermission_API(group_name text, username text, table_name text, access text)
+FUNCTION @extschema@._CDB_Group_Table_GrantPermission_API(group_name text, username text, table_name text, access text)
     RETURNS VOID AS
 $$
     import string
-    import urllib
+    try:
+        from urllib import pathname2url
+    except:
+        from urllib.request import pathname2url
 
-    url = '/api/v1/databases/{0}/groups/%s/permission/%s/tables/%s' % (urllib.pathname2url(group_name), username, table_name)
+    url = '/api/v1/databases/{0}/groups/%s/permission/%s/tables/%s' % (pathname2url(group_name), username, table_name)
     body = '{ "access": "%s" }' % access
-    query = "select cartodb._CDB_Group_API_Request('PUT', '%s', '%s', '{200, 409}') as response_status" % (url, body)
+    query = "select @extschema@._CDB_Group_API_Request('PUT', '%s', '%s', '{200, 409}') as response_status" % (url, body)
     plpy.execute(query)
-$$ LANGUAGE 'plpythonu' VOLATILE SECURITY DEFINER;
+$$  LANGUAGE '@@plpythonu@@'
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
 
 DO LANGUAGE 'plpgsql' $$
 BEGIN
     -- Needed for dropping type
-    DROP FUNCTION IF EXISTS cartodb._CDB_Group_API_Conf();
-    DROP TYPE IF EXISTS _CDB_Group_API_Params;
+    DROP FUNCTION IF EXISTS @extschema@._CDB_Group_API_Conf();
+    DROP TYPE IF EXISTS @extschema@._CDB_Group_API_Params;
 END
 $$;
 
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_Table_RevokeAllPermission_API(group_name text, username text, table_name text)
+FUNCTION @extschema@._CDB_Group_Table_RevokeAllPermission_API(group_name text, username text, table_name text)
     RETURNS VOID AS
 $$
     import string
-    import urllib
+    try:
+        from urllib import pathname2url
+    except:
+        from urllib.request import pathname2url
 
-    url = '/api/v1/databases/{0}/groups/%s/permission/%s/tables/%s' % (urllib.pathname2url(group_name), username, table_name)
-    query = "select cartodb._CDB_Group_API_Request('DELETE', '%s', '', '{200, 404}') as response_status" % url
+    url = '/api/v1/databases/{0}/groups/%s/permission/%s/tables/%s' % (pathname2url(group_name), username, table_name)
+    query = "select @extschema@._CDB_Group_API_Request('DELETE', '%s', '', '{200, 404}') as response_status" % url
     plpy.execute(query)
-$$ LANGUAGE 'plpythonu' VOLATILE SECURITY DEFINER;
+$$  LANGUAGE '@@plpythonu@@'
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
 
 DO LANGUAGE 'plpgsql' $$
 BEGIN
     -- Needed for dropping type
-    DROP FUNCTION IF EXISTS cartodb._CDB_Group_API_Conf();
-    DROP TYPE IF EXISTS _CDB_Group_API_Params;
+    DROP FUNCTION IF EXISTS @extschema@._CDB_Group_API_Conf();
+    DROP TYPE IF EXISTS @extschema@._CDB_Group_API_Params;
 END
 $$;
 
-CREATE TYPE _CDB_Group_API_Params AS (
+CREATE TYPE @extschema@._CDB_Group_API_Params AS (
     host text,
     port int,
     timeout int,
@@ -135,35 +180,38 @@ CREATE TYPE _CDB_Group_API_Params AS (
 -- This must be explicitally extracted because "composite types are currently not supported".
 -- See http://www.postgresql.org/docs/9.3/static/plpython-database.html.
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_API_Conf()
-    RETURNS _CDB_Group_API_Params AS
+FUNCTION @extschema@._CDB_Group_API_Conf()
+    RETURNS @extschema@._CDB_Group_API_Params AS
 $$
-    conf = plpy.execute("SELECT cartodb.CDB_Conf_GetConf('groups_api') conf")[0]['conf']
+    conf = plpy.execute("SELECT @extschema@.CDB_Conf_GetConf('groups_api') conf")[0]['conf']
     if conf is None:
       return None
     else:
       import json
       params = json.loads(conf)
-      auth = 'Basic %s' % plpy.execute("SELECT cartodb._CDB_Group_API_Auth('%s', '%s') as auth" % (params['username'], params['password']))[0]['auth']
+      auth = 'Basic %s' % plpy.execute("SELECT @extschema@._CDB_Group_API_Auth('%s', '%s') as auth" % (params['username'], params['password']))[0]['auth']
       return { "host": params['host'], "port": params['port'], 'timeout': params['timeout'], 'auth': auth }
-$$ LANGUAGE 'plpythonu' VOLATILE;
+$$ LANGUAGE '@@plpythonu@@' VOLATILE PARALLEL UNSAFE;
 
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_API_Auth(username text, password text)
+FUNCTION @extschema@._CDB_Group_API_Auth(username text, password text)
     RETURNS TEXT AS
 $$
     import base64
     return base64.encodestring('%s:%s' % (username, password)).replace('\n', '')
-$$ LANGUAGE 'plpythonu' VOLATILE;
+$$ LANGUAGE '@@plpythonu@@' VOLATILE PARALLEL UNSAFE;
 
 -- url must contain a '%s' placeholder that will be replaced by current_database, for security reasons.
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Group_API_Request(method text, url text, body text, valid_return_codes int[])
+FUNCTION @extschema@._CDB_Group_API_Request(method text, url text, body text, valid_return_codes int[])
     RETURNS int AS
 $$
-    import httplib
+    try:
+        import httplib as client
+    except:
+        from http import client
 
-    params = plpy.execute("select c.host, c.port, c.timeout, c.auth from cartodb._CDB_Group_API_Conf() c;")[0]
+    params = plpy.execute("select c.host, c.port, c.timeout, c.auth from @extschema@._CDB_Group_API_Conf() c;")[0]
     if params['host'] is None:
       return None
 
@@ -174,22 +222,22 @@ $$
     last_err = None
     while retry > 0:
       try:
-        client = SD['groups_api_client'] = httplib.HTTPConnection(params['host'], params['port'], False, params['timeout'])
+        conn = SD['groups_api_client'] = client.HTTPConnection(params['host'], params['port'], False, params['timeout'])
         database_name = plpy.execute("select current_database();")[0]['current_database']
-        client.request(method, url.format(database_name), body, headers)
-        response = client.getresponse()
+        conn.request(method, url.format(database_name), body, headers)
+        response = conn.getresponse()
         assert response.status in valid_return_codes
         return response.status
       except Exception as err:
         retry -= 1
         last_err = err
         plpy.warning('Retrying after: ' + str(err))
-        client = SD['groups_api_client'] = None
+        conn = SD['groups_api_client'] = None
 
     if last_err is not None:
       plpy.error('Fatal Group API error: ' + str(last_err))
       raise last_err
 
     return None
-$$ LANGUAGE 'plpythonu' VOLATILE;
-revoke all on function cartodb._CDB_Group_API_Request(text, text, text, int[]) from public;
+$$ LANGUAGE '@@plpythonu@@' VOLATILE PARALLEL UNSAFE;
+revoke all on function @extschema@._CDB_Group_API_Request(text, text, text, int[]) from public;

scripts-available/CDB_HeadsTailsBins.sql

@@ -8,7 +8,7 @@
 --  
 --
 
-CREATE OR REPLACE FUNCTION CDB_HeadsTailsBins ( in_array NUMERIC[], breaks INT) RETURNS NUMERIC[] as $$ 
+CREATE OR REPLACE FUNCTION @extschema@.CDB_HeadsTailsBins ( in_array NUMERIC[], breaks INT) RETURNS NUMERIC[] as $$ 
 DECLARE 
     element_count INT4; 
     arr_mean numeric; 
@@ -43,4 +43,4 @@ BEGIN
     END LOOP; 
     RETURN reply; 
 END; 
-$$ language plpgsql IMMUTABLE;
+$$ language plpgsql IMMUTABLE PARALLEL SAFE;

scripts-available/CDB_Helper.sql

@@ -1,7 +1,11 @@
+-- Create a sequence that belongs to the schema of the extension.
+-- It will be used to generate unique identifiers within the
+
+
 -- UTF8 safe and length aware. Find a unique identifier with a given prefix
 -- and/or suffix and withing a schema. If a schema is not specified, the identifier
 -- is guaranteed to be unique for all schemas.
-CREATE OR REPLACE FUNCTION cartodb._CDB_Unique_Identifier(prefix TEXT, relname TEXT, suffix TEXT, schema TEXT DEFAULT NULL)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Unique_Identifier(prefix TEXT, relname TEXT, suffix TEXT, schema TEXT DEFAULT NULL)
 RETURNS TEXT
 AS $$
 DECLARE
@@ -15,15 +19,15 @@ DECLARE
 
   i INTEGER;
 BEGIN
-  -- Accounts for the _XX incremental suffix in case the identifier is taken
-  usedspace := 3;
+  -- Accounts for the XXXX incremental suffix in case the identifier is taken
+  usedspace := 4;
   usedspace := usedspace + coalesce(octet_length(prefix), 0);
   usedspace := usedspace + coalesce(octet_length(suffix), 0);
 
-  candrelname := _CDB_Octet_Truncate(relname, maxlen - usedspace);
+  candrelname := @extschema@._CDB_Octet_Truncate(relname, maxlen - usedspace);
 
   IF candrelname = '' THEN
-    PERFORM _CDB_Error('prefixes are to long to generate a valid identifier', '_CDB_Unique_Identifier');
+    PERFORM @extschema@._CDB_Error('prefixes are to long to generate a valid identifier', '_CDB_Unique_Identifier');
   END IF;
 
   ident := coalesce(prefix, '') || candrelname || coalesce(suffix, '');
@@ -31,7 +35,7 @@ BEGIN
   i := 0;
   origident := ident;
 
-  WHILE i < 100 LOOP
+  WHILE i < 10000 LOOP
     IF schema IS NOT NULL THEN
       SELECT c.relname, n.nspname
       INTO rec
@@ -51,18 +55,18 @@ BEGIN
       RETURN ident;
     END IF;
 
-    ident := origident || '_' || i;
+    ident := origident || i;
     i := i + 1;
   END LOOP;
 
-  PERFORM _CDB_Error('looping too far', '_CDB_Unique_Identifier');
+  PERFORM @extschema@._CDB_Error('looping too far', '_CDB_Unique_Identifier');
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' VOLATILE PARALLEL UNSAFE;
 
 
 -- UTF8 safe and length aware. Find a unique identifier for a column with a given prefix
 -- and/or suffix based on colname and within a relation specified via reloid.
-CREATE OR REPLACE FUNCTION cartodb._CDB_Unique_Column_Identifier(prefix TEXT, colname TEXT, suffix TEXT, reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Unique_Column_Identifier(prefix TEXT, colname TEXT, suffix TEXT, reloid REGCLASS)
 RETURNS TEXT
 AS $$
 DECLARE
@@ -76,15 +80,15 @@ DECLARE
 
   i INTEGER;
 BEGIN
-  -- Accounts for the _XX incremental suffix in case the identifier is taken
-  usedspace := 3;
+  -- Accounts for the XXXX incremental suffix in case the identifier is taken
+  usedspace := 4;
   usedspace := usedspace + coalesce(octet_length(prefix), 0);
   usedspace := usedspace + coalesce(octet_length(suffix), 0);
 
-  candcolname := _CDB_Octet_Truncate(colname, maxlen - usedspace);
+  candcolname := @extschema@._CDB_Octet_Truncate(colname, maxlen - usedspace);
 
   IF candcolname = '' THEN
-    PERFORM _CDB_Error('prefixes are to long to generate a valid identifier', '_CDB_Unique_Column_Identifier');
+    PERFORM @extschema@._CDB_Error('prefixes are to long to generate a valid identifier', '_CDB_Unique_Column_Identifier');
   END IF;
 
   ident := coalesce(prefix, '') || candcolname || coalesce(suffix, '');
@@ -92,7 +96,7 @@ BEGIN
   i := 0;
   origident := ident;
 
-  WHILE i < 100 LOOP
+  WHILE i < 10000 LOOP
     SELECT a.attname
     INTO rec
     FROM pg_class c
@@ -106,18 +110,18 @@ BEGIN
       RETURN ident;
     END IF;
 
-    ident := origident || '_' || i;
+    ident := origident || i;
     i := i + 1;
   END LOOP;
 
-  PERFORM _CDB_Error('looping too far', '_CDB_Unique_Column_Identifier');
+  PERFORM @extschema@._CDB_Error('looping too far', '_CDB_Unique_Column_Identifier');
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' VOLATILE PARALLEL SAFE;
 
 
 -- Truncates a given string to a max_octets octets taking care
 -- not to leave characters in half. UTF8 safe.
-CREATE OR REPLACE FUNCTION cartodb._CDB_Octet_Truncate(string TEXT, max_octets INTEGER)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Octet_Truncate(string TEXT, max_octets INTEGER)
 RETURNS TEXT
 AS $$
 DECLARE
@@ -153,4 +157,21 @@ BEGIN
 
   RETURN left(string, (i - 1));
 END;
-$$ LANGUAGE 'plpgsql';
+$$ LANGUAGE 'plpgsql' IMMUTABLE PARALLEL SAFE;
+
+
+-- Checks if a given text representing a qualified or unqualified table name (relation)
+-- actually exists in the database. It is meant to be used as a guard for other function/queries.
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Table_Exists(table_name_with_optional_schema TEXT)
+RETURNS bool
+AS $$
+DECLARE
+    table_exists bool := false;
+BEGIN
+    table_exists := EXISTS(SELECT * FROM pg_class WHERE table_name_with_optional_schema::regclass::oid = oid AND relkind = 'r');
+    RETURN table_exists;
+EXCEPTION
+    WHEN invalid_schema_name OR undefined_table THEN
+        RETURN false;
+END;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;

scripts-available/CDB_Hexagon.sql

@@ -1,14 +1,18 @@
 -- Return an Hexagon with given center and side (or maximal radius)
-CREATE OR REPLACE FUNCTION CDB_MakeHexagon(center GEOMETRY, radius FLOAT8)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_MakeHexagon(center GEOMETRY, radius FLOAT8)
 RETURNS GEOMETRY
 AS $$
-  SELECT ST_MakePolygon(ST_MakeLine(geom))
+  SELECT @postgisschema@.ST_MakePolygon(@postgisschema@.ST_MakeLine(geom))
     FROM
     (
-      SELECT (ST_DumpPoints(ST_ExteriorRing(ST_Buffer($1, $2, 3)))).*
+      SELECT (@postgisschema@.ST_DumpPoints(@postgisschema@.ST_ExteriorRing(@postgisschema@.ST_Buffer($1, $2, 3)))).*
     ) as points
     WHERE path[1] % 2 != 0
-$$ LANGUAGE 'sql' IMMUTABLE STRICT;
+$$ LANGUAGE 'sql' IMMUTABLE STRICT PARALLEL SAFE;
+
+
+-- In older versions of the extension, CDB_HexagonGrid had a different signature
+DROP FUNCTION IF EXISTS @extschema@.CDB_HexagonGrid(GEOMETRY, FLOAT8, GEOMETRY);
 
 --
 -- Fill given extent with an hexagonal coverage
@@ -25,10 +29,13 @@ $$ LANGUAGE 'sql' IMMUTABLE STRICT;
 --               If omitted the origin will be 0,0.
 --               The parameter is checked for having the same SRID
 --               as the extent.
---  
 --
+-- @param maxcells Optional maximum number of grid cells to generate;
+--                 if the grid requires more cells to cover the extent
+--                 and exception will occur.
+----
 -- DROP FUNCTION IF EXISTS CDB_HexagonGrid(ext GEOMETRY, side FLOAT8);
-CREATE OR REPLACE FUNCTION CDB_HexagonGrid(ext GEOMETRY, side FLOAT8, origin GEOMETRY DEFAULT NULL)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_HexagonGrid(ext GEOMETRY, side FLOAT8, origin GEOMETRY DEFAULT NULL, maxcells INTEGER DEFAULT 512*512)
 RETURNS SETOF GEOMETRY
 AS $$
 DECLARE
@@ -73,11 +80,11 @@ BEGIN
   yoff := 0;
 
   IF origin IS NOT NULL THEN
-    IF ST_SRID(origin) != srid THEN
+    IF @postgisschema@.ST_SRID(origin) != srid THEN
       RAISE EXCEPTION 'SRID mismatch between extent (%) and origin (%)', srid, ST_SRID(origin);
     END IF;
-    xoff := ST_X(origin);
-    yoff := ST_Y(origin);
+    xoff := @postgisschema@.ST_X(origin);
+    yoff := @postgisschema@.ST_Y(origin);
   END IF;
 
   RAISE DEBUG 'X offset: %', xoff;
@@ -89,47 +96,53 @@ BEGIN
   RAISE DEBUG 'Y grid size: %', ygrd;
 
   -- Tweak horizontal start on hstep*2 grid from origin 
-  hskip := ceil((ST_XMin(ext)-xoff)/hstep);
+  hskip := ceil((@postgisschema@.ST_XMin(ext)-xoff)/hstep);
   RAISE DEBUG 'hskip: %', hskip;
   hstart := xoff + hskip*hstep;
   RAISE DEBUG 'hstart: %', hstart;
 
   -- Tweak vertical start on hstep grid from origin 
-  vstart := yoff + ceil((ST_Ymin(ext)-yoff)/vstep)*vstep; 
+  vstart := yoff + ceil((@postgisschema@.ST_Ymin(ext)-yoff)/vstep)*vstep; 
   RAISE DEBUG 'vstart: %', vstart;
 
-  hend := ST_XMax(ext);
-  vend := ST_YMax(ext);
+  hend := @postgisschema@.ST_XMax(ext);
+  vend := @postgisschema@.ST_YMax(ext);
 
-  IF vstart - (vstep/2.0) < ST_YMin(ext) THEN
+  IF vstart - (vstep/2.0) < @postgisschema@.ST_YMin(ext) THEN
     vstartary := ARRAY[ vstart + (vstep/2.0), vstart ];
   ELSE
     vstartary := ARRAY[ vstart - (vstep/2.0), vstart ];
   END IF;
 
+  If maxcells IS NOT NULL AND maxcells > 0 THEN
+    IF CEIL((CEIL((vend-vstart)/(vstep/2.0)) * CEIL((hend-hstart)/(hstep*2.0/3.0)))/3.0)::integer > maxcells THEN
+      RAISE EXCEPTION 'The requested grid is too big to be rendered';
+    END IF;
+  END IF;
+
   vstartidx := abs(hskip)%2;
 
   RAISE DEBUG 'vstartary: % : %', vstartary[1], vstartary[2];
   RAISE DEBUG 'vstartidx: %', vstartidx;
 
-  c := ST_SetSRID(ST_MakePoint(hstart, vstartary[vstartidx+1]), srid);
-  h := ST_SnapToGrid(CDB_MakeHexagon(c, side), xoff, yoff, xgrd, ygrd);
+  c := @postgisschema@.ST_SetSRID(@postgisschema@.ST_MakePoint(hstart, vstartary[vstartidx+1]), srid);
+  h := @postgisschema@.ST_SnapToGrid(@extschema@.CDB_MakeHexagon(c, side), xoff, yoff, xgrd, ygrd);
   vstartidx := (vstartidx + 1) % 2;
-  WHILE ST_X(c) < hend LOOP -- over X
+  WHILE @postgisschema@.ST_X(c) < hend LOOP -- over X
     --RAISE DEBUG 'X loop starts, center point: %', ST_AsText(c);
-    WHILE ST_Y(c) < vend LOOP -- over Y
+    WHILE @postgisschema@.ST_Y(c) < vend LOOP -- over Y
       --RAISE DEBUG 'Center: %', ST_AsText(c);
       --h := ST_SnapToGrid(CDB_MakeHexagon(c, side), xoff, yoff, xgrd, ygrd);
       RETURN NEXT h;
-      h := ST_SnapToGrid(ST_Translate(h, 0, vstep), xoff, yoff, xgrd, ygrd);
-      c := ST_Translate(c, 0, vstep);  -- TODO: drop ?
+      h := @postgisschema@.ST_SnapToGrid(ST_Translate(h, 0, vstep), xoff, yoff, xgrd, ygrd);
+      c := @postgisschema@.ST_Translate(c, 0, vstep);  -- TODO: drop ?
     END LOOP;
     -- TODO: translate h direcly ...
-    c := ST_SetSRID(ST_MakePoint(ST_X(c)+hstep, vstartary[vstartidx+1]), srid);
-    h := ST_SnapToGrid(CDB_MakeHexagon(c, side), xoff, yoff, xgrd, ygrd);
+    c := @postgisschema@.ST_SetSRID(@postgisschema@.ST_MakePoint(ST_X(c)+hstep, vstartary[vstartidx+1]), srid);
+    h := @postgisschema@.ST_SnapToGrid(@extschema@.CDB_MakeHexagon(c, side), xoff, yoff, xgrd, ygrd);
     vstartidx := (vstartidx + 1) % 2;
   END LOOP;
 
   RETURN;
 END
-$$ LANGUAGE 'plpgsql' IMMUTABLE;
+$$ LANGUAGE 'plpgsql' IMMUTABLE PARALLEL SAFE;

scripts-available/CDB_JenksBins.sql

@@ -10,212 +10,337 @@
 --
 -- @param invert Optional wheter to return the top of each bin (default)
 --               or the bottom. BOOLEAN, default=FALSE.
---  
+--
 --
 
+CREATE OR REPLACE FUNCTION @extschema@.CDB_JenksBins(in_array NUMERIC[], breaks INT, iterations INT DEFAULT 0, invert BOOLEAN DEFAULT FALSE)
+RETURNS NUMERIC[] as
+$$
+DECLARE
+    in_matrix NUMERIC[][];
+    in_unique_count BIGINT;
 
-CREATE OR REPLACE FUNCTION CDB_JenksBins ( in_array NUMERIC[], breaks INT, iterations INT DEFAULT 5, invert BOOLEAN DEFAULT FALSE) RETURNS NUMERIC[] as $$ 
-DECLARE 
-    element_count INT4; 
+    shuffles INT;
     arr_mean NUMERIC;
+    sdam NUMERIC;
+
+    i INT;
     bot INT;
     top INT;
+
     tops INT[];
     classes INT[][];
-    i INT := 1; j INT := 1; 
+    j INT := 1;
     curr_result NUMERIC[];
     best_result NUMERIC[];
     seedtarget TEXT;
-    quant NUMERIC[];
-    shuffles INT;
+
 BEGIN
-    -- get the total size of our row
-    element_count := array_length(in_array, 1); --array_upper(in_array, 1) - array_lower(in_array, 1); 
-    -- ensure the ordering of in_array
-    SELECT array_agg(e) INTO in_array FROM (SELECT unnest(in_array) e ORDER BY e) x;
-    -- stop if no rows 
-    IF element_count IS NULL THEN  
-        RETURN NULL; 
-    END IF; 
-    -- stop if our breaks are more than our input array size
-    IF element_count < breaks THEN  
-        RETURN in_array; 
-    END IF; 
+    -- We clean the input array (remove NULLs) and create 2 arrays
+    -- [1] contains the unique values in in_array
+    -- [2] contains the number of appearances of those unique values
+    SELECT ARRAY[array_agg(value), array_agg(count)] FROM
+    (
+        SELECT value, count(1)::numeric as count
+        FROM  unnest(in_array) AS value
+        WHERE value is NOT NULL
+        GROUP BY value
+        ORDER BY value
+    ) __clean_array_q INTO in_matrix;
 
-    shuffles := LEAST(GREATEST(floor(2500000.0/(element_count::float*iterations::float)), 1), 750)::int;
-    -- get our mean value
-    SELECT avg(v) INTO arr_mean FROM (  SELECT unnest(in_array) as v ) x; 
+    -- Get the number of unique values
+    in_unique_count := array_length(in_matrix[1:1], 2);
 
-    -- assume best is actually Quantile
-    SELECT CDB_QuantileBins(in_array, breaks) INTO quant;
-
-    -- if data is very very large, just return quant and be done
-    IF element_count > 5000000 THEN
-        RETURN quant;
+    IF in_unique_count IS NULL THEN
+        RETURN NULL;
     END IF;
 
-    -- change quant into bottom, top markers
-    LOOP 
-        IF i = 1 THEN 
-            bot = 1;
-        ELSE 
-            -- use last top to find this bot
-            bot = top+1;
-        END IF;
-        IF i = breaks THEN
-            top = element_count;
+    IF in_unique_count <= breaks THEN
+        -- There isn't enough distinct values for the requested breaks
+        RETURN ARRAY(Select unnest(in_matrix[1:1])) _a;
+    END IF;
+
+    -- If not declated explicitly we iterate based on the length of the array
+    IF iterations < 1 THEN
+        -- This is based on a 'looks fine' heuristic
+        iterations := log(in_unique_count)::integer + 1;
+    END IF;
+
+    -- We set the number of shuffles per iteration as the number of unique values but
+    -- this is just another 'looks fine' heuristic
+    shuffles := in_unique_count;
+
+    -- Get the mean value of the whole vector (already ignores NULLs)
+    SELECT avg(v) INTO arr_mean FROM ( SELECT unnest(in_array) as v ) x;
+
+    -- Calculate the sum of squared deviations from the array mean (SDAM).
+    SELECT sum(((arr_mean - v)^2) * w) INTO sdam FROM (
+        SELECT unnest(in_matrix[1:1]) as v, unnest(in_matrix[2:2]) as w
+        ) x;
+
+    -- To start, we create ranges with approximately the same amount of different values
+    top := 0;
+    i := 1;
+    LOOP
+        bot := top + 1;
+        top := ROUND(i * in_unique_count::numeric / breaks::NUMERIC);
+
+        IF i = 1 THEN
+            classes = ARRAY[ARRAY[bot,top]];
         ELSE
-            SELECT count(*) INTO top FROM ( SELECT unnest(in_array) as v) x WHERE v <= quant[i];
-        END IF;
-        IF i = 1 THEN 
-            classes = ARRAY[ARRAY[bot,top]]; 
-        ELSE 
-            classes = ARRAY_CAT(classes,ARRAY[bot,top]); 
+            classes = ARRAY_CAT(classes, ARRAY[bot,top]);
         END IF;
+
+        i := i + 1;
         IF i > breaks THEN EXIT; END IF;
-        i = i+1;
     END LOOP;
 
-    best_result = CDB_JenksBinsIteration( in_array, breaks, classes, invert, element_count, arr_mean, shuffles);
+    best_result = @extschema@.CDB_JenksBinsIteration(in_matrix, breaks, classes, invert, sdam, shuffles);
 
     --set the seed so we can ensure the same results
     SELECT setseed(0.4567) INTO seedtarget;
     --loop through random starting positions
     LOOP
-        IF j > iterations-1 THEN  EXIT;  END IF;  
+        IF j > iterations-1 THEN  EXIT;  END IF;
         i = 1;
-        tops = ARRAY[element_count];
+        tops = ARRAY[in_unique_count];
         LOOP
-            IF i = breaks THEN  EXIT;  END IF;  
-            SELECT array_agg(distinct e) INTO tops FROM (SELECT unnest(array_cat(tops, ARRAY[floor(random()*element_count::float)::int])) as e ORDER BY e) x WHERE e != 1;
-            i = array_length(tops, 1); 
-        END LOOP; 
+            IF i = breaks THEN  EXIT;  END IF;
+            SELECT array_agg(distinct e) INTO tops FROM (
+                SELECT unnest(array_cat(tops, ARRAY[trunc(random() * in_unique_count::float8)::int + 1])) as e ORDER BY e
+                ) x;
+            i = array_length(tops, 1);
+        END LOOP;
+        top := 0;
         i = 1;
-        LOOP  
-            IF i > breaks THEN  EXIT;  END IF;  
-            IF i = 1 THEN
-                bot = 1;
-            ELSE
-                bot = top+1;
-            END IF;
+        LOOP
+            bot := top + 1;
             top = tops[i];
-            IF i = 1 THEN 
-                classes = ARRAY[ARRAY[bot,top]]; 
-            ELSE 
-                classes = ARRAY_CAT(classes,ARRAY[bot,top]); 
+            IF i = 1 THEN
+                classes = ARRAY[ARRAY[bot,top]];
+            ELSE
+                classes = ARRAY_CAT(classes, ARRAY[bot,top]);
             END IF;
-            i := i+1; 
-        END LOOP; 
-        curr_result = CDB_JenksBinsIteration( in_array, breaks, classes, invert, element_count, arr_mean, shuffles);
+
+            i := i+1;
+            IF i > breaks THEN EXIT; END IF;
+        END LOOP;
+
+        curr_result = @extschema@.CDB_JenksBinsIteration(in_matrix, breaks, classes, invert, sdam, shuffles);
 
         IF curr_result[1] > best_result[1] THEN
             best_result = curr_result;
-            j = j-1; -- if we found a better result, add one more search
         END IF;
+
         j = j+1;
     END LOOP;
 
     RETURN (best_result)[2:array_upper(best_result, 1)];
 END;
-$$ language plpgsql IMMUTABLE;
-
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL RESTRICTED;
 
 
 --
 -- Perform a single iteration of the Jenks classification
 --
+-- Returns an array with:
+-- - First element: gvf
+-- - Second to 2+n: Category limits
+DROP FUNCTION IF EXISTS @extschema@.CDB_JenksBinsIteration ( in_matrix NUMERIC[], breaks INT, classes INT[], invert BOOLEAN, element_count INT4, arr_mean NUMERIC, max_search INT); -- Old signature
+
+CREATE OR REPLACE FUNCTION @extschema@.CDB_JenksBinsIteration ( in_matrix NUMERIC[], breaks INT, classes INT[], invert BOOLEAN, sdam NUMERIC, max_search INT DEFAULT 50) RETURNS NUMERIC[] as $$
+DECLARE
+    i INT;
+    iterations INT = 0;
 
-CREATE OR REPLACE FUNCTION CDB_JenksBinsIteration ( in_array NUMERIC[], breaks INT, classes INT[][], invert BOOLEAN, element_count INT4, arr_mean NUMERIC, max_search INT DEFAULT 50) RETURNS NUMERIC[] as $$ 
-DECLARE 
-    tmp_val numeric; 
-    new_classes int[][];
-    tmp_class int[];
-    i INT := 1; 
-    j INT := 1; 
     side INT := 2;
-    sdam numeric; 
-    gvf numeric := 0.0; 
-    new_gvf numeric; 
-    arr_gvf numeric[]; 
-    class_avg numeric; 
-    class_max_i INT; 
-    class_min_i INT; 
-    class_max numeric; 
-    class_min numeric; 
-    reply numeric[]; 
-BEGIN 
 
-    -- Calculate the sum of squared deviations from the array mean (SDAM).
-    SELECT sum((arr_mean - e)^2) INTO sdam FROM (  SELECT unnest(in_array) as e ) x; 
-    --Identify the breaks for the lowest GVF
-    LOOP   
-        i = 1; 
-        LOOP 
-            -- get our mean
-            SELECT avg(e) INTO class_avg FROM ( SELECT unnest(in_array[classes[i][1]:classes[i][2]]) as e) x;  
-            -- find the deviation
-            SELECT sum((class_avg-e)^2) INTO tmp_val FROM (   SELECT unnest(in_array[classes[i][1]:classes[i][2]]) as e  ) x;  
-            IF i = 1 THEN 
-                arr_gvf = ARRAY[tmp_val]; 
-                -- init our min/max map for later
-                class_max = arr_gvf[i];  
-                class_min = arr_gvf[i];  
-                class_min_i = 1;   
-                class_max_i = 1;  
-            ELSE 
-                arr_gvf = array_append(arr_gvf, tmp_val); 
-            END IF;
-            i := i+1;  
-            IF i > breaks THEN EXIT; END IF;  
-        END LOOP;  
-        -- calculate our new GVF
-        SELECT sdam-sum(e) INTO new_gvf FROM (  SELECT unnest(arr_gvf) as e  ) x;  
-        -- if no improvement was made, exit
-        IF new_gvf < gvf THEN EXIT; END IF; 
-        gvf = new_gvf;  
-        IF j > max_search THEN EXIT; END IF; 
-        j = j+1;
-        i = 1;  
-        LOOP  
-            --establish directionality (uppward through classes or downward)
-            IF arr_gvf[i] < class_min THEN   
-                class_min = arr_gvf[i];   
-                class_min_i = i;  
-            END IF;  
-            IF arr_gvf[i] > class_max THEN   
-                class_max = arr_gvf[i];   
-                class_max_i = i;  
-            END IF;  
-            i := i+1;  
-            IF i > breaks THEN EXIT; END IF;  
-        END LOOP;  
-        IF class_max_i > class_min_i THEN
-            class_min_i = class_max_i - 1;
+    gvf numeric := 0.0;
+    new_gvf numeric;
+    arr_gvf numeric[];
+    arr_avg numeric[];
+    class_avg numeric;
+    class_dev numeric;
+
+    class_max_i INT = 0;
+    class_min_i INT = 0;
+    dev_max numeric;
+    dev_min numeric;
+
+    best_classes INT[] = classes;
+    best_gvf numeric[];
+    best_avg numeric[];
+    move_elements INT = 1;
+
+    reply numeric[];
+
+BEGIN
+
+    -- We fill the arrays with the initial values
+    i = 0;
+    LOOP
+        IF i = breaks THEN EXIT; END IF;
+        i = i + 1;
+
+        -- Get class mean
+        SELECT (sum(v * w) / sum(w)) INTO class_avg FROM (
+            SELECT unnest(in_matrix[1:1][classes[i][1]:classes[i][2]]) as v,
+                    unnest(in_matrix[2:2][classes[i][1]:classes[i][2]]) as w
+            ) x;
+
+        -- Get class deviation
+        SELECT sum((class_avg - v)^2 * w) INTO class_dev FROM (
+            SELECT unnest(in_matrix[1:1][classes[i][1]:classes[i][2]]) as v,
+                    unnest(in_matrix[2:2][classes[i][1]:classes[i][2]]) as w
+            ) x;
+
+
+        IF i = 1 THEN
+            arr_avg = ARRAY[class_avg];
+            arr_gvf = ARRAY[class_dev];
         ELSE
-            class_min_i = class_max_i + 1;
+            arr_avg = array_append(arr_avg, class_avg);
+            arr_gvf = array_append(arr_gvf, class_dev);
         END IF;
-            --Move from higher class to a lower gid order
-            IF class_max_i > class_min_i THEN
-                classes[class_max_i][1] = classes[class_max_i][1] + 1;
-                classes[class_min_i][2] = classes[class_min_i][2] + 1;
-            ELSE -- Move from lower class UP into a higher class by gid
-                classes[class_max_i][2] = classes[class_max_i][2] - 1;
-                classes[class_min_i][1] = classes[class_min_i][1] - 1;
+    END LOOP;
+
+    -- We copy the values to avoid recalculation when a failure happens
+    best_avg = arr_avg;
+    best_gvf = arr_gvf;
+
+    iterations = 0;
+    LOOP
+        IF iterations = max_search THEN EXIT; END IF;
+        iterations = iterations + 1;
+
+        -- calculate our new GVF
+        SELECT sdam - sum(e) INTO new_gvf FROM ( SELECT unnest(arr_gvf) as e ) x;
+
+        -- Check if any improvement was made
+        IF new_gvf <= gvf THEN
+            -- If we were moving too many elements, go back and move less
+            IF move_elements <= 2 OR class_max_i = class_min_i THEN
+                EXIT;
             END IF;
-    END LOOP; 
+
+            move_elements = GREATEST(move_elements / 8, 1);
+
+            -- Rollback from saved statuses
+            classes = best_classes;
+            new_gvf = gvf;
+
+            i = class_min_i;
+            LOOP
+                arr_avg[i] = best_avg[i];
+                arr_gvf[i] = best_gvf[i];
+
+                IF i = class_max_i THEN EXIT; END IF;
+                i = i + 1;
+            END LOOP;
+        END IF;
+
+        -- We search for the classes with the min and max deviation
+        i = 1;
+        class_min_i = 1;
+        class_max_i = 1;
+        dev_max = arr_gvf[1];
+        dev_min = arr_gvf[1];
+        LOOP
+            IF i = breaks THEN EXIT; END IF;
+            i = i + 1;
+
+            IF arr_gvf[i] < dev_min THEN
+                dev_min = arr_gvf[i];
+                class_min_i = i;
+            ELSE
+                IF arr_gvf[i] > dev_max THEN
+                    dev_max = arr_gvf[i];
+                    class_max_i = i;
+                END IF;
+            END IF;
+        END LOOP;
+
+
+        -- Save best values for comparison and output
+        gvf = new_gvf;
+        best_classes = classes;
+
+        -- Limit the moved elements as to not remove everything from class_max_i
+        move_elements = LEAST(move_elements, classes[class_max_i][2] - classes[class_max_i][1]);
+
+        -- Move `move_elements` from class_max_i to class_min_i
+        IF class_min_i < class_max_i THEN
+            i := class_min_i;
+            LOOP
+                IF i = class_max_i THEN EXIT; END IF;
+                classes[i][2] = classes[i][2] + move_elements;
+                i := i + 1;
+            END LOOP;
+
+            i := class_max_i;
+            LOOP
+                IF i = class_min_i THEN EXIT; END IF;
+                classes[i][1] = classes[i][1] + move_elements;
+                i := i - 1;
+            END LOOP;
+        ELSE
+            i := class_min_i;
+            LOOP
+                IF i = class_max_i THEN EXIT; END IF;
+                classes[i][1] = classes[i][1] - move_elements;
+                i := i - 1;
+            END LOOP;
+
+            i := class_max_i;
+            LOOP
+                IF i = class_min_i THEN EXIT; END IF;
+                classes[i][2] = classes[i][2] - move_elements;
+                i := i + 1;
+            END LOOP;
+        END IF;
+
+        -- Recalculate avg and deviation ONLY for the affected classes
+        i = LEAST(class_min_i, class_max_i);
+        class_max_i = GREATEST(class_min_i, class_max_i);
+        class_min_i = i;
+        LOOP
+            SELECT (sum(v * w) / sum(w)) INTO class_avg FROM (
+                SELECT unnest(in_matrix[1:1][classes[i][1]:classes[i][2]]) as v,
+                        unnest(in_matrix[2:2][classes[i][1]:classes[i][2]]) as w
+                ) x;
+
+            SELECT sum((class_avg - v)^2 * w) INTO class_dev FROM (
+                SELECT unnest(in_matrix[1:1][classes[i][1]:classes[i][2]]) as v,
+                        unnest(in_matrix[2:2][classes[i][1]:classes[i][2]]) as w
+                ) x;
+
+            -- Save status (in case it's needed for rollback) and store the new one
+            best_avg[i] = arr_avg[i];
+            arr_avg[i] = class_avg;
+
+            best_gvf[i] = arr_gvf[i];
+            arr_gvf[i] = class_dev;
+
+            IF i = class_max_i THEN EXIT; END IF;
+            i = i + 1;
+        END LOOP;
+
+        move_elements = move_elements * 2;
+
+    END LOOP;
 
     i = 1;
-    LOOP  
+    LOOP
         IF invert = TRUE THEN
             side = 1; --default returns bottom side of breaks, invert returns top side
         END IF;
-        reply = array_append(reply, in_array[classes[i][side]]);  
-        i = i+1;  
-        IF i > breaks THEN  EXIT; END IF; 
-    END LOOP; 
-    
-    RETURN array_prepend(gvf, reply); 
+        reply = array_append(reply, unnest(in_matrix[1:1][best_classes[i][side]:best_classes[i][side]]));
+        i = i+1;
+        IF i > breaks THEN  EXIT; END IF;
+    END LOOP;
 
-END; 
-$$ language plpgsql IMMUTABLE;
+    reply = array_prepend(gvf, reply);
+    RETURN reply;
 
+END;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;

scripts-available/CDB_LatLng.sql

@@ -7,13 +7,11 @@
 --  
 --
 
-CREATE OR REPLACE FUNCTION CDB_LatLng (lat NUMERIC, lng NUMERIC) RETURNS geometry as $$ 
-    -- this function is silly
-    SELECT ST_SetSRID(ST_MakePoint(lng,lat),4326);
-$$ language SQL IMMUTABLE;
+CREATE OR REPLACE FUNCTION @extschema@.CDB_LatLng (lat NUMERIC, lng NUMERIC) RETURNS @postgisschema@.geometry as $$ 
+    SELECT @postgisschema@.ST_SetSRID(@postgisschema@.ST_MakePoint(lng,lat), 4326);
+$$ language SQL IMMUTABLE PARALLEL SAFE;
 
-CREATE OR REPLACE FUNCTION CDB_LatLng (lat FLOAT8, lng FLOAT8) RETURNS geometry as $$ 
-    -- this function is silly
-    SELECT ST_SetSRID(ST_MakePoint(lng,lat),4326);
-$$ language SQL IMMUTABLE;
+CREATE OR REPLACE FUNCTION @extschema@.CDB_LatLng (lat FLOAT8, lng FLOAT8) RETURNS @postgisschema@.geometry as $$
+    SELECT @postgisschema@.ST_SetSRID(@postgisschema@.ST_MakePoint(lng,lat), 4326);
+$$ language SQL IMMUTABLE PARALLEL SAFE;
 

scripts-available/CDB_Math.sql

@@ -4,7 +4,7 @@
 -- Mode
 -- https://wiki.postgresql.org/wiki/Aggregate_Mode
 
-CREATE OR REPLACE FUNCTION cartodb._CDB_Math_final_mode(anyarray)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Math_final_mode(anyarray)
   RETURNS anyelement AS
 $BODY$
     SELECT a
@@ -13,14 +13,15 @@ $BODY$
     ORDER BY COUNT(1) DESC, 1
     LIMIT 1;
 $BODY$
-LANGUAGE 'sql' IMMUTABLE;
+LANGUAGE 'sql' IMMUTABLE PARALLEL SAFE;
 
-DROP AGGREGATE IF EXISTS cartodb.CDB_Math_Mode(anyelement);
+DROP AGGREGATE IF EXISTS @extschema@.CDB_Math_Mode(anyelement);
 
-CREATE AGGREGATE cartodb.CDB_Math_Mode(anyelement) (
+CREATE AGGREGATE @extschema@.CDB_Math_Mode(anyelement) (
   SFUNC=array_append,
   STYPE=anyarray,
-  FINALFUNC=_CDB_Math_final_mode,
+  FINALFUNC=@extschema@._CDB_Math_final_mode,
+  PARALLEL = SAFE,
   INITCOND='{}'
 );
 

scripts-available/CDB_OAuth.sql

@@ -0,0 +1,65 @@
+-- Function that reassign the owner of a table to their ownership_role
+CREATE OR REPLACE FUNCTION @extschema@.CDB_OAuthReassignTableOwnerOnCreation()
+  RETURNS event_trigger
+  AS $$
+DECLARE
+    obj record;
+    owner_role text;
+    creator_role text;
+BEGIN
+    FOR obj IN SELECT * FROM pg_event_trigger_ddl_commands()
+    LOOP
+      RAISE DEBUG '% ddl object: % % % %',
+                  tg_tag,
+                  obj.command_tag,
+                  obj.object_type,
+                  obj.schema_name,
+                  obj.object_identity;
+      IF obj.object_type = 'function' THEN
+        SELECT rolname FROM pg_proc JOIN pg_roles ON proowner = pg_roles.oid WHERE pg_proc.oid = obj.objid INTO creator_role;
+      ELSE
+	      SELECT rolname FROM pg_class JOIN pg_roles ON relowner = pg_roles.oid WHERE pg_class.oid = obj.objid INTO creator_role;
+      END IF;
+      SELECT value->>'ownership_role_name' from @extschema@.CDB_Conf_GetConf('api_keys_' || quote_ident(creator_role)) value INTO owner_role;
+      IF owner_role IS NULL OR owner_role = '' THEN
+        RAISE DEBUG 'owner_role not found';
+        CONTINUE;
+      ELSE
+        EXECUTE 'ALTER ' || obj.object_type || ' ' || obj.object_identity || ' OWNER TO ' || quote_ident(owner_role);
+        IF obj.object_type = 'function' THEN
+          EXECUTE 'GRANT ALL ON FUNCTION ' || obj.object_identity || ' TO ' || QUOTE_IDENT(creator_role);
+        ELSE
+          EXECUTE 'GRANT ALL ON ' || obj.object_identity || ' TO ' || QUOTE_IDENT(creator_role);
+        END IF;        
+        RAISE DEBUG 'Changing ownership from % to %', creator_role, owner_role;
+      END IF;
+    END LOOP;
+END;
+$$  LANGUAGE plpgsql
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
+
+-- Creates the trigger on DDL events in order to reassign the owner
+CREATE OR REPLACE FUNCTION @extschema@.CDB_EnableOAuthReassignTablesTrigger()
+RETURNS void
+AS $$
+  BEGIN
+    DROP EVENT TRIGGER IF EXISTS oauth_reassign_tables_trigger;
+
+    CREATE EVENT TRIGGER oauth_reassign_tables_trigger
+    ON ddl_command_end
+    WHEN TAG IN ('CREATE TABLE', 'CREATE TABLE AS', 'SELECT INTO', 'CREATE VIEW', 'CREATE FOREIGN TABLE', 'CREATE MATERIALIZED VIEW', 'CREATE SEQUENCE', 'CREATE FUNCTION')
+    EXECUTE PROCEDURE @extschema@.CDB_OAuthReassignTableOwnerOnCreation();
+  END;
+$$ LANGUAGE plpgsql VOLATILE PARALLEL UNSAFE;
+
+-- Deletes the trigger on DDL events in order to reassign the owner
+CREATE OR REPLACE FUNCTION @extschema@.CDB_DisableOAuthReassignTablesTrigger()
+RETURNS void
+AS $$
+  BEGIN
+    DROP EVENT TRIGGER IF EXISTS oauth_reassign_tables_trigger;
+  END;
+$$ LANGUAGE plpgsql VOLATILE PARALLEL UNSAFE;

scripts-available/CDB_Organizations.sql

@@ -1,16 +1,23 @@
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Organization_Member_Group_Role_Member_Name()
+FUNCTION @extschema@.CDB_Organization_Member_Group_Role_Member_Name()
     RETURNS TEXT
 AS $$
     SELECT 'cdb_org_member'::text || '_' || md5(current_database());
 $$
-LANGUAGE SQL IMMUTABLE;
+LANGUAGE SQL STABLE PARALLEL SAFE;
 
+
+----- ########################## WARNING ##########################
+----- The code below creates a new role for the organization but
+----- only when the extension is INSTALLED in a database, i.e. it
+----- won't work if you clone a database that has it installed.
+----- If you do, you need to update the extension to next and back
+----- ########################## WARNING ##########################
 DO LANGUAGE 'plpgsql' $$
 DECLARE
     cdb_org_member_role_name TEXT;
 BEGIN
-  cdb_org_member_role_name := cartodb.CDB_Organization_Member_Group_Role_Member_Name();
+  cdb_org_member_role_name := @extschema@.CDB_Organization_Member_Group_Role_Member_Name();
   IF NOT EXISTS ( SELECT * FROM pg_roles WHERE rolname= cdb_org_member_role_name )
   THEN
     EXECUTE 'CREATE ROLE "' || cdb_org_member_role_name || '" NOLOGIN;';
@@ -19,31 +26,37 @@ END
 $$;
 
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Organization_Create_Member(role_name text)
+FUNCTION @extschema@.CDB_Organization_Create_Member(role_name text)
     RETURNS void
 AS $$
 BEGIN
-    EXECUTE 'GRANT "' || cartodb.CDB_Organization_Member_Group_Role_Member_Name() || '" TO "' || role_name || '"';
+    EXECUTE 'GRANT "' || @extschema@.CDB_Organization_Member_Group_Role_Member_Name() || '" TO "' || role_name || '"';
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -------------------------------------------------------------------------------
 -- Administrator
 -------------------------------------------------------------------------------
 CREATE OR REPLACE
-FUNCTION cartodb._CDB_Organization_Admin_Role_Name()
+FUNCTION @extschema@._CDB_Organization_Admin_Role_Name()
     RETURNS TEXT
 AS $$
     SELECT current_database() || '_a'::text;
 $$
-LANGUAGE SQL IMMUTABLE;
+LANGUAGE SQL STABLE PARALLEL SAFE;
 
+----- ########################## WARNING ##########################
+----- The code below creates a new role for the organization but
+----- only when the extension is INSTALLED in a database, i.e. it
+----- won't work if you clone a database that has it installed.
+----- If you do, you need to update the extension to next and back
+----- ########################## WARNING ##########################
 -- Administrator role creation on extension install
 DO LANGUAGE 'plpgsql' $$
 DECLARE
     cdb_org_admin_role_name TEXT;
 BEGIN
-    cdb_org_admin_role_name := cartodb._CDB_Organization_Admin_Role_Name();
+    cdb_org_admin_role_name := @extschema@._CDB_Organization_Admin_Role_Name();
     IF NOT EXISTS ( SELECT * FROM pg_roles WHERE rolname= cdb_org_admin_role_name )
     THEN
         EXECUTE format('CREATE ROLE %I CREATEROLE NOLOGIN;', cdb_org_admin_role_name);
@@ -52,80 +65,105 @@ END
 $$;
 
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Organization_AddAdmin(username text)
+FUNCTION @extschema@.CDB_Organization_AddAdmin(username text)
     RETURNS void
 AS $$
 DECLARE
     cdb_user_role TEXT;
     cdb_admin_role TEXT;
 BEGIN
-    cdb_admin_role := cartodb._CDB_Organization_Admin_Role_Name();
-    cdb_user_role := cartodb._CDB_User_RoleFromUsername(username);
+    cdb_admin_role := @extschema@._CDB_Organization_Admin_Role_Name();
+    cdb_user_role := @extschema@._CDB_User_RoleFromUsername(username);
     EXECUTE format('GRANT %I TO %I WITH ADMIN OPTION', cdb_admin_role, cdb_user_role);
     -- CREATEROLE is not inherited, and is needed for user creation
     EXECUTE format('ALTER ROLE %I CREATEROLE', cdb_user_role);
 END
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Organization_RemoveAdmin(username text)
+FUNCTION @extschema@.CDB_Organization_RemoveAdmin(username text)
     RETURNS void
 AS $$
 DECLARE
     cdb_user_role TEXT;
     cdb_admin_role TEXT;
 BEGIN
-    cdb_admin_role := cartodb._CDB_Organization_Admin_Role_Name();
-    cdb_user_role := cartodb._CDB_User_RoleFromUsername(username);
+    cdb_admin_role := @extschema@._CDB_Organization_Admin_Role_Name();
+    cdb_user_role := @extschema@._CDB_User_RoleFromUsername(username);
     EXECUTE format('ALTER ROLE %I NOCREATEROLE', cdb_user_role);
     EXECUTE format('REVOKE %I FROM %I', cdb_admin_role, cdb_user_role);
 END
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -------------------------------------------------------------------------------
 -- Sharing tables
 -------------------------------------------------------------------------------
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Organization_Add_Table_Read_Permission(from_schema text, table_name text, to_role_name text)
+FUNCTION @extschema@.CDB_Organization_Add_Table_Read_Permission(from_schema text, table_name text, to_role_name text)
     RETURNS void
 AS $$
 BEGIN
     EXECUTE 'GRANT USAGE ON SCHEMA "' || from_schema || '" TO "' || to_role_name || '"';
     EXECUTE 'GRANT SELECT ON "' || from_schema || '"."' || table_name || '" TO "' || to_role_name || '"';
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Organization_Add_Table_Organization_Read_Permission(from_schema text, table_name text)
+FUNCTION @extschema@.CDB_Organization_Add_Table_Organization_Read_Permission(from_schema text, table_name text)
     RETURNS void
 AS $$
 BEGIN
-    EXECUTE 'SELECT cartodb.CDB_Organization_Add_Table_Read_Permission(''' || from_schema || ''', ''' || table_name || ''', ''' || cartodb.CDB_Organization_Member_Group_Role_Member_Name() || ''');';
+    EXECUTE 'SELECT @extschema@.CDB_Organization_Add_Table_Read_Permission(''' || from_schema || ''', ''' || table_name || ''', ''' || @extschema@.CDB_Organization_Member_Group_Role_Member_Name() || ''');';
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Organization_Add_Table_Read_Write_Permission(from_schema text, table_name text, to_role_name text)
+FUNCTION @extschema@._CDB_Organization_Get_Table_Sequences(from_schema text, table_name text)
+    RETURNS SETOF TEXT
+AS $$
+BEGIN
+    RETURN QUERY EXECUTE 'SELECT
+        quote_ident(n.nspname) || ''.'' || quote_ident(c.relname)
+    FROM
+        pg_depend d
+        JOIN pg_class c ON d.objid = c.oid
+        JOIN pg_namespace n ON c.relnamespace = n.oid
+    WHERE
+        d.refobjsubid > 0 AND
+        d.classid = ''pg_class''::regclass AND
+        c.relkind = ''S''::"char" AND
+        d.refobjid = (''' || quote_ident(from_schema) || '.' || quote_ident(table_name) ||''')::regclass';
+END
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+CREATE OR REPLACE
+FUNCTION @extschema@.CDB_Organization_Add_Table_Read_Write_Permission(from_schema text, table_name text, to_role_name text)
     RETURNS void
 AS $$
+DECLARE
+    sequence_name TEXT;
 BEGIN
     EXECUTE 'GRANT USAGE ON SCHEMA "' || from_schema || '" TO "' || to_role_name || '"';
     EXECUTE 'GRANT SELECT, INSERT, UPDATE, DELETE ON "' || from_schema || '"."' || table_name || '" TO "' || to_role_name || '"';
+
+    FOR sequence_name IN SELECT * FROM @extschema@._CDB_Organization_Get_Table_Sequences(from_schema, table_name) LOOP
+        EXECUTE 'GRANT USAGE, SELECT ON SEQUENCE ' || sequence_name || ' TO "' || to_role_name || '"';
+    END LOOP;
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Organization_Add_Table_Organization_Read_Write_Permission(from_schema text, table_name text)
+FUNCTION @extschema@.CDB_Organization_Add_Table_Organization_Read_Write_Permission(from_schema text, table_name text)
     RETURNS void
 AS $$
 BEGIN
-    EXECUTE 'SELECT cartodb.CDB_Organization_Add_Table_Read_Write_Permission(''' || from_schema || ''', ''' || table_name || ''', ''' || cartodb.CDB_Organization_Member_Group_Role_Member_Name() || ''');';
+    EXECUTE 'SELECT @extschema@.CDB_Organization_Add_Table_Read_Write_Permission(''' || from_schema || ''', ''' || table_name || ''', ''' || @extschema@.CDB_Organization_Member_Group_Role_Member_Name() || ''');';
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Organization_Remove_Access_Permission(from_schema text, table_name text, to_role_name text)
+FUNCTION @extschema@.CDB_Organization_Remove_Access_Permission(from_schema text, table_name text, to_role_name text)
     RETURNS void
 AS $$
 BEGIN
@@ -134,13 +172,20 @@ BEGIN
     -- We need to revoke usage on schema only if we are revoking privileges from the last table where to_role_name has
     -- any permission granted within the schema from_schema
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 CREATE OR REPLACE
-FUNCTION cartodb.CDB_Organization_Remove_Organization_Access_Permission(from_schema text, table_name text)
+FUNCTION @extschema@.CDB_Organization_Remove_Organization_Access_Permission(from_schema text, table_name text)
     RETURNS void
 AS $$
 BEGIN
-    EXECUTE 'SELECT cartodb.CDB_Organization_Remove_Access_Permission(''' || from_schema || ''', ''' || table_name || ''', ''' || cartodb.CDB_Organization_Member_Group_Role_Member_Name() || ''');';
+    EXECUTE 'SELECT @extschema@.CDB_Organization_Remove_Access_Permission(''' || from_schema || ''', ''' || table_name || ''', ''' || @extschema@.CDB_Organization_Member_Group_Role_Member_Name() || ''');';
 END
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+
+--------------------------------------------------------------------------------
+-- Deprecated
+--------------------------------------------------------------------------------
+DROP FUNCTION IF EXISTS @extschema@.CDB_Organization_Grant_Role(name);
+DROP FUNCTION IF EXISTS @extschema@.CDB_Organization_Revoke_Role(name);

scripts-available/CDB_Overviews.sql

@@ -2,7 +2,7 @@
 -- Scope: public
 -- Parameters:
 --   reloid: oid of the table.
-CREATE OR REPLACE FUNCTION CDB_DropOverviews(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_DropOverviews(reloid REGCLASS)
 RETURNS void
 AS $$
 DECLARE
@@ -10,15 +10,15 @@ DECLARE
     schema_name TEXT;
     table_name TEXT;
 BEGIN
-    SELECT * FROM _cdb_split_table_name(reloid) INTO schema_name, table_name;
+    SELECT * FROM @extschema@._cdb_split_table_name(reloid) INTO schema_name, table_name;
     FOR row IN
-        SELECT * FROM CDB_Overviews(reloid)
+        SELECT * FROM @extschema@.CDB_Overviews(reloid)
     LOOP
         EXECUTE Format('DROP TABLE %s;', row.overview_table);
         RAISE NOTICE 'Dropped overview for level %: %', row.z, row.overview_table;
     END LOOP;
 END;
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 
 
@@ -29,23 +29,23 @@ $$ LANGUAGE PLPGSQL VOLATILE;
 -- Return relation of overviews for the table with
 -- the base table oid,
 -- z level of the overview and overview table oid, ordered by z.
-CREATE OR REPLACE FUNCTION CDB_Overviews(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Overviews(reloid REGCLASS)
 RETURNS TABLE(base_table REGCLASS, z integer, overview_table REGCLASS)
 AS $$
   DECLARE
     schema_name TEXT;
     base_table_name TEXT;
   BEGIN
-    SELECT * FROM _cdb_split_table_name(reloid) INTO schema_name, base_table_name;
+    SELECT * FROM @extschema@._cdb_split_table_name(reloid) INTO schema_name, base_table_name;
     RETURN QUERY SELECT
       reloid AS base_table,
-      _CDB_OverviewTableZ(table_name) AS z,
+      @extschema@._CDB_OverviewTableZ(table_name) AS z,
       table_regclass AS overview_table
-      FROM _CDB_UserTablesInSchema(schema_name)
-      WHERE _CDB_IsOverviewTableOf((SELECT relname FROM pg_class WHERE oid=reloid), table_name)
+      FROM @extschema@._CDB_UserTablesInSchema(schema_name)
+      WHERE @extschema@._CDB_IsOverviewTableOf((SELECT relname FROM pg_class WHERE oid=reloid), table_name)
       ORDER BY z;
   END
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL STABLE PARALLEL RESTRICTED;
 
 -- Return existing overviews (if any) for multiple dataset tables.
 -- Scope: public
@@ -56,31 +56,31 @@ $$ LANGUAGE PLPGSQL;
 -- z level of the overview and overview table oid, ordered by z.
 -- Note: CDB_Overviews can be applied to the result of CDB_QueryTablesText
 -- to obtain the overviews applicable to a query.
-CREATE OR REPLACE FUNCTION CDB_Overviews(tables regclass[])
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Overviews(tables regclass[])
 RETURNS TABLE(base_table REGCLASS, z integer, overview_table REGCLASS)
 AS $$
   SELECT
     base_table::regclass AS base_table,
-    _CDB_OverviewTableZ(table_name) AS z,
+    @extschema@._CDB_OverviewTableZ(table_name) AS z,
     table_regclass AS overview_table
     FROM
-      _CDB_UserTablesInSchema(), unnest(tables) base_table
+      @extschema@._CDB_UserTablesInSchema(), unnest(tables) base_table
     WHERE
-      schema_name = _cdb_schema_name(base_table)
-      AND _CDB_IsOverviewTableOf((SELECT relname FROM pg_class WHERE oid=base_table), table_name)
+      schema_name = @extschema@._cdb_schema_name(base_table)
+      AND @extschema@._CDB_IsOverviewTableOf((SELECT relname FROM pg_class WHERE oid=base_table), table_name)
     ORDER BY base_table, z;
-$$ LANGUAGE SQL;
+$$ LANGUAGE SQL STABLE PARALLEL SAFE;
 
 -- Calculate the estimated extent of a cartodbfy'ed table.
 -- Scope: private.
 -- Parameters
 --   reloid: oid of the input table.
 -- Return value A box2d extent in 3857.
-CREATE OR REPLACE FUNCTION _cdb_estimated_extent(reloid REGCLASS)
-RETURNS box2d
+CREATE OR REPLACE FUNCTION @extschema@._cdb_estimated_extent(reloid REGCLASS)
+RETURNS @postgisschema@.box2d
 AS $$
   DECLARE
-    ext box2d;
+    ext @postgisschema@.box2d;
     ext_query text;
     table_id record;
   BEGIN
@@ -89,29 +89,26 @@ AS $$
       FROM pg_class c JOIN pg_namespace n on n.oid = c.relnamespace WHERE c.oid = reloid::oid;
 
     ext_query = format(
-      'SELECT ST_EstimatedExtent(''%1$s'', ''%2$s'', ''%3$s'');',
+      'SELECT @postgisschema@.ST_EstimatedExtent(''%1$s'', ''%2$s'', ''%3$s'');',
       table_id.schema_name, table_id.table_name, 'the_geom_webmercator'
     );
 
-    BEGIN
-      EXECUTE ext_query INTO ext;
-    EXCEPTION
-        -- This is the typical ERROR: stats for "mytable" do not exist
-        WHEN internal_error THEN
+    EXECUTE ext_query INTO ext;
+    IF ext IS NULL THEN
           -- Get stats and execute again
           EXECUTE format('ANALYZE %1$s', reloid);
 
           -- We check the geometry type in case the error is due to empty geometries
-          IF _CDB_GeometryTypes(reloid) IS NULL THEN
+          IF @extschema@._CDB_GeometryTypes(reloid) IS NULL THEN
             RETURN NULL;
           END IF;
 
           EXECUTE ext_query INTO ext;
-    END;
+    END IF;
 
     RETURN ext;
   END;
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Determine the max feature density of a given dataset.
 -- Scope: private.
@@ -119,7 +116,7 @@ $$ LANGUAGE PLPGSQL VOLATILE;
 --   reloid: oid of the input table. It must be a cartodbfy'ed table.
 --   nz: number of zoom levels to consider from z0 upward.
 -- Return value: feature density (num_features / webmercator_squared_meters).
-CREATE OR REPLACE FUNCTION _CDB_Feature_Density(reloid REGCLASS, nz integer)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Feature_Density(reloid REGCLASS, nz integer)
 RETURNS FLOAT8
 AS $$
   DECLARE
@@ -138,7 +135,7 @@ AS $$
   -- the area of tiles at level Z: c*c*power(2, -2*z)
   -- with c = CDB_XYZ_Resolution(-8) (earth circumference)
   min_features = '500';
-  SELECT CDB_XYZ_Resolution(-8) INTO c;
+  SELECT @extschema@.CDB_XYZ_Resolution(-8) INTO c;
 
   -- We first compute a set of *seed* tiles, of the minimum Z level, z0, such that
   -- they cover the extent of the table and we have at least n of them in each
@@ -149,27 +146,27 @@ AS $$
   -- considered tiles.
   EXECUTE Format('
     WITH RECURSIVE t(x, y, z, e) AS (
-      WITH ext AS (SELECT _cdb_estimated_extent(%6$s) as g),
+      WITH ext AS (SELECT @extschema@._cdb_estimated_extent(%6$s) as g),
       base AS (
         SELECT
           least(
-           -floor(log(2, (greatest(ST_XMax(ext.g)-ST_XMin(ext.g), ST_YMax(ext.g)-ST_YMin(ext.g))/(%4$s*%5$s))::numeric)),
-           _CDB_MaxOverviewLevel()+1
+           -floor(log(2, (greatest(@postgisschema@.ST_XMax(ext.g)-@postgisschema@.ST_XMin(ext.g), @postgisschema@.ST_YMax(ext.g)-@postgisschema@.ST_YMin(ext.g))/(%4$s*%5$s))::numeric)),
+           @extschema@._CDB_MaxOverviewLevel()+1
           )::integer z
         FROM ext
       ),
       lim AS (
         SELECT
-          FLOOR((ST_XMin(ext.g)+CDB_XYZ_Resolution(0)*128)/(CDB_XYZ_Resolution(base.z)*256))::integer x0,
-          FLOOR((ST_XMax(ext.g)+CDB_XYZ_Resolution(0)*128)/(CDB_XYZ_Resolution(base.z)*256))::integer x1,
-          FLOOR((CDB_XYZ_Resolution(0)*128-ST_YMin(ext.g))/(CDB_XYZ_Resolution(base.z)*256))::integer y1,
-          FLOOR((CDB_XYZ_Resolution(0)*128-ST_YMax(ext.g))/(CDB_XYZ_Resolution(base.z)*256))::integer y0
+          FLOOR((@postgisschema@.ST_XMin(ext.g)+@extschema@.CDB_XYZ_Resolution(0)*128)/(@extschema@.CDB_XYZ_Resolution(base.z)*256))::integer x0,
+          FLOOR((@postgisschema@.ST_XMax(ext.g)+@extschema@.CDB_XYZ_Resolution(0)*128)/(@extschema@.CDB_XYZ_Resolution(base.z)*256))::integer x1,
+          FLOOR((@extschema@.CDB_XYZ_Resolution(0)*128-@postgisschema@.ST_YMin(ext.g))/(@extschema@.CDB_XYZ_Resolution(base.z)*256))::integer y1,
+          FLOOR((@extschema@.CDB_XYZ_Resolution(0)*128-@postgisschema@.ST_YMax(ext.g))/(@extschema@.CDB_XYZ_Resolution(base.z)*256))::integer y0
         FROM ext, base
       ),
       seed AS (
         SELECT xt, yt, base.z, (
           SELECT count(*) FROM %1$s
-            WHERE the_geom_webmercator && CDB_XYZ_Extent(xt, yt, base.z)
+            WHERE the_geom_webmercator && @extschema@.CDB_XYZ_Extent(xt, yt, base.z)
         ) e
         FROM base, lim, generate_series(lim.x0, lim.x1) xt, generate_series(lim.y0, lim.y1) yt
       )
@@ -177,17 +174,17 @@ AS $$
       UNION ALL
       SELECT x*2 + xx, y*2 + yy, t.z+1, (
         SELECT count(*) FROM %1$s
-          WHERE the_geom_webmercator && CDB_XYZ_Extent(t.x*2 + c.xx, t.y*2 + c.yy, t.z+1)
+          WHERE the_geom_webmercator && @extschema@.CDB_XYZ_Extent(t.x*2 + c.xx, t.y*2 + c.yy, t.z+1)
       )
       FROM t, base, (VALUES (0, 0), (0, 1), (1, 1), (1, 0)) AS c(xx, yy)
       WHERE t.e > %2$s AND t.z < least(base.z + %3$s, _CDB_MaxZoomLevel())
     )
-    SELECT MAX(e/ST_Area(CDB_XYZ_Extent(x,y,z))) FROM t where e > 0;
+    SELECT MAX(e/@postgisschema@.ST_Area(@extschema@.CDB_XYZ_Extent(x,y,z))) FROM t where e > 0;
   ', reloid::text, min_features, nz, n, c, reloid::oid)
   INTO fd;
   RETURN fd;
   END
-$$ LANGUAGE PLPGSQL STABLE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Experimental default strategy to assign a reference base Z level
 -- to a cartodbfied table. The resulting Z level represents the
@@ -196,7 +193,7 @@ $$ LANGUAGE PLPGSQL STABLE;
 -- Parameters:
 --   reloid: oid of the input table. It must be a cartodbfy'ed table.
 -- Return value: Z level as an integer
-CREATE OR REPLACE FUNCTION _CDB_Feature_Density_Ref_Z_Strategy(reloid REGCLASS, tolerance_px FLOAT8 DEFAULT NULL)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Feature_Density_Ref_Z_Strategy(reloid REGCLASS, tolerance_px FLOAT8 DEFAULT NULL)
 RETURNS INTEGER
 AS $$
   DECLARE
@@ -213,17 +210,17 @@ AS $$
 
     -- Compute fd as an estimation of the (maximum) number
     -- of features per unit of tile area (in webmercator squared meters)
-    SELECT _CDB_Feature_Density(reloid, nz) INTO fd;
+    SELECT @extschema@._CDB_Feature_Density(reloid, nz) INTO fd;
     -- lim maximum number of (desiderable) features per tile
     -- we have c = 2*Pi*R = CDB_XYZ_Resolution(-8) (earth circumference)
     -- ta(z): tile area = power(c*power(2,-z), 2) = c*c*power(2,-2*z)
     -- => fd*ta(z) is the average number of features per tile at level z
     -- find minimum z so that fd*ta(z) <= lim
     -- compute a rough 'feature density' value
-    SELECT CDB_XYZ_Resolution(-8) INTO c;
-    RETURN least(_CDB_MaxOverviewLevel()+1, ceil(log(2.0, (c*c*fd/lim)::numeric)/2));
+    SELECT @extschema@.CDB_XYZ_Resolution(-8) INTO c;
+    RETURN least(@extschema@._CDB_MaxOverviewLevel()+1, ceil(log(2.0, (c*c*fd/lim)::numeric)/2));
   END;
-$$ LANGUAGE PLPGSQL STABLE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Overview table name for a given Z level and base dataset or overview table
 -- Scope: private.
@@ -234,7 +231,7 @@ $$ LANGUAGE PLPGSQL STABLE;
 --   overview_z Z level of the overview to be named, must be smaller than ref_z
 -- Return value: the name to be used for the overview. The name is always
 -- unqualified (does not include a schema name).
-CREATE OR REPLACE FUNCTION _CDB_Overview_Name(ref REGCLASS, ref_z INTEGER, overview_z INTEGER)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Overview_Name(ref REGCLASS, ref_z INTEGER, overview_z INTEGER)
 RETURNS TEXT
 AS $$
   DECLARE
@@ -243,11 +240,11 @@ AS $$
     suffix TEXT;
     is_overview BOOLEAN;
   BEGIN
-    SELECT * FROM _cdb_split_table_name(ref) INTO schema_name, base;
-    SELECT _CDB_OverviewBaseTableName(base) INTO base;
-    RETURN _CDB_OverviewTableName(base, overview_z);
+    SELECT * FROM @extschema@._cdb_split_table_name(ref) INTO schema_name, base;
+    SELECT @extschema@._CDB_OverviewBaseTableName(base) INTO base;
+    RETURN @extschema@._CDB_OverviewTableName(base, overview_z);
   END
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 
 -- Sampling reduction method.
 -- Valid for any kind of geometry.
@@ -257,7 +254,7 @@ $$ LANGUAGE PLPGSQL IMMUTABLE;
 --   ref_z Z level assigned to the original table
 --   overview_z Z level of the overview to be generated, must be smaller than ref_z
 -- Return value: Name of the generated overview table
-CREATE OR REPLACE FUNCTION _CDB_Sampling_Reduce_Strategy(reloid REGCLASS, ref_z INTEGER, overview_z INTEGER, tolerance_px FLOAT8 DEFAULT NULL)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Sampling_Reduce_Strategy(reloid REGCLASS, ref_z INTEGER, overview_z INTEGER, tolerance_px FLOAT8 DEFAULT NULL, has_overview_created BOOLEAN DEFAULT FALSE)
 RETURNS REGCLASS
 AS $$
   DECLARE
@@ -268,14 +265,24 @@ AS $$
     num_samples INTEGER;
     schema_name TEXT;
     table_name TEXT;
+    overview_table_name TEXT;
+    creation_clause TEXT;
   BEGIN
-    overview_rel := _CDB_Overview_Name(reloid, ref_z, overview_z);
+    overview_rel := @extschema@._CDB_Overview_Name(reloid, ref_z, overview_z);
     -- TODO: compute fraction from tolerance_px if not NULL
     fraction := power(2, 2*(overview_z - ref_z));
 
-    SELECT * FROM _cdb_split_table_name(reloid) INTO schema_name, table_name;
+    SELECT * FROM @extschema@._cdb_split_table_name(reloid) INTO schema_name, table_name;
 
-    EXECUTE Format('DROP TABLE IF EXISTS %I.%I CASCADE;', schema_name, overview_rel);
+    overview_table_name := Format('%I.%I', schema_name, overview_rel);
+    IF has_overview_created THEN
+      RAISE NOTICE 'Sampling reduce stategy deleting and inserting because % has overviews', overview_table_name;
+      EXECUTE Format('DELETE FROM %s;', overview_table_name);
+      creation_clause := Format('INSERT INTO %s', overview_table_name);
+    ELSE
+      RAISE NOTICE 'Sampling reduce stategy creating a new table overview %', overview_table_name;
+      creation_clause := Format('CREATE TABLE %s AS', overview_table_name);
+    END IF;
 
     -- Estimate number of rows
     SELECT reltuples, relpages FROM pg_class INTO STRICT class_info
@@ -284,23 +291,23 @@ AS $$
     IF class_info.relpages < 2 OR fraction > 0.5 THEN
       -- We'll avoid possible CDB_RandomTids problems
       EXECUTE Format('
-        CREATE TABLE %I AS SELECT * FROM %s WHERE random() < %s;
-      ', overview_rel, reloid, fraction);
+        %s SELECT * FROM %s WHERE random() < %s;
+      ', creation_clause, reloid, fraction);
     ELSE
       num_samples := ceil(class_info.reltuples*fraction);
       EXECUTE Format('
-        CREATE TABLE %4$I.%1$I AS SELECT * FROM %2$s
+        %1$s SELECT * FROM %2$s
           WHERE ctid = ANY (
             ARRAY[
-              (SELECT CDB_RandomTids(''%2$s'', %3$s))
+              (SELECT @extschema@.CDB_RandomTids(''%2$s'', %3$s))
             ]
           );
-      ', overview_rel, reloid, num_samples, schema_name);
+      ', creation_clause, reloid, num_samples);
     END IF;
 
-    RETURN Format('%I.%I', schema_name, overview_rel)::regclass;
+    RETURN Format('%s', overview_table_name)::regclass;
   END;
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Register new overview table (post-creation chores)
 -- Scope: private
@@ -311,9 +318,9 @@ $$ LANGUAGE PLPGSQL;
 -- This function is declared SECURITY DEFINER so it executes with the privileges
 -- of the function creator to have a chance to alter the privileges of the
 -- overview table to match those of the dataset. It will only perform any change
--- if the overview table belgons to the same scheme as the dataset and it
+-- if the overview table belongs to the same scheme as the dataset and it
 -- matches the scheme naming for overview tables.
-CREATE OR REPLACE FUNCTION _CDB_Register_Overview(dataset REGCLASS, overview_table REGCLASS, overview_z INTEGER)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Register_Overview(dataset REGCLASS, overview_table REGCLASS, overview_z INTEGER)
 RETURNS VOID
 AS $$
   DECLARE
@@ -327,10 +334,10 @@ AS $$
     -- This function will only register a table as an overview table if it matches
     -- the overviews naming scheme for the dataset and z level and the table belongs
     -- to the same scheme as the the dataset
-    SELECT * FROM _cdb_split_table_name(dataset) INTO dataset_scheme, dataset_name;
-    SELECT * FROM _cdb_split_table_name(overview_table) INTO overview_scheme, overview_name;
+    SELECT * FROM @extschema@._cdb_split_table_name(dataset) INTO dataset_scheme, dataset_name;
+    SELECT * FROM @extschema@._cdb_split_table_name(overview_table) INTO overview_scheme, overview_name;
     IF dataset_scheme = overview_scheme AND
-       overview_name = _CDB_OverviewTableName(dataset_name, overview_z) THEN
+       overview_name = @extschema@._CDB_OverviewTableName(dataset_name, overview_z) THEN
 
       -- preserve the owner of the base table
       SELECT u.usename
@@ -349,13 +356,17 @@ AS $$
         WHERE c_from.oid  = dataset
         AND   c_to.oid    = overview_table;
 
-      PERFORM _CDB_Add_Indexes(overview_table);
+      PERFORM @extschema@._CDB_Add_Indexes(overview_table);
 
       -- TODO: If metadata about existing overviews is to be stored
       -- it should be done here (CDB_Overviews would consume such metadata)
     END IF;
   END
-$$ LANGUAGE PLPGSQL SECURITY DEFINER;
+$$  LANGUAGE PLPGSQL
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
 
 -- Dataset attributes (column names other than the
 -- CartoDB primary key and geometry columns) which should be aggregated
@@ -364,14 +375,14 @@ $$ LANGUAGE PLPGSQL SECURITY DEFINER;
 -- Parameters
 --   reloid: oid of the input table. It must be a cartodbfy'ed table.
 -- Return value: set of attribute names
-CREATE OR REPLACE FUNCTION _CDB_Aggregable_Attributes(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Aggregable_Attributes(reloid REGCLASS)
 RETURNS SETOF information_schema.sql_identifier
 AS $$
-  SELECT c FROM CDB_ColumnNames(reloid) c, _CDB_Columns() cdb
+  SELECT c FROM @extschema@.CDB_ColumnNames(reloid) c, @extschema@._CDB_Columns() cdb
     WHERE c NOT IN (
       cdb.pkey, cdb.geomcol, cdb.mercgeomcol
     )
-$$ LANGUAGE SQL STABLE;
+$$ LANGUAGE SQL STABLE PARALLEL SAFE;
 
 -- List of dataset attributes to be aggregated in aggregated overview
 -- as a comma-separated SQL expression.
@@ -379,22 +390,22 @@ $$ LANGUAGE SQL STABLE;
 -- Parameters
 --   reloid: oid of the input table. It must be a cartodbfy'ed table.
 -- Return value: SQL subexpression as text
-CREATE OR REPLACE FUNCTION _CDB_Aggregable_Attributes_Expression(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Aggregable_Attributes_Expression(reloid REGCLASS)
 RETURNS TEXT
 AS $$
 DECLARE
   attr_list TEXT;
 BEGIN
   SELECT string_agg(s.c, ',') FROM (
-    SELECT * FROM _CDB_Aggregable_Attributes(reloid) c
+    SELECT @extschema@._CDB_Aggregable_Attributes(reloid)::text c
   ) AS s INTO attr_list;
 
   RETURN attr_list;
 END
-$$ LANGUAGE PLPGSQL STABLE;
+$$ LANGUAGE PLPGSQL STABLE PARALLEL SAFE;
 
 -- Check if a column of a table is of an unlimited-length text type
-CREATE OR REPLACE FUNCTION _cdb_unlimited_text_column(reloid REGCLASS, col_name TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._cdb_unlimited_text_column(reloid REGCLASS, col_name TEXT)
 RETURNS BOOLEAN
 AS $$
   SELECT EXISTS (
@@ -407,9 +418,9 @@ AS $$
       AND format_type(a.atttypid, NULL) IN ('text', 'character varying', 'character')
       AND format_type(a.atttypid, NULL) = format_type(a.atttypid, a.atttypmod)
   );
-$$ LANGUAGE SQL STABLE;
+$$ LANGUAGE SQL STABLE PARALLEL SAFE;
 
-CREATE OR REPLACE FUNCTION _cdb_categorical_column(reloid REGCLASS, col_name TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._cdb_categorical_column(reloid REGCLASS, col_name TEXT)
 RETURNS BOOLEAN
 AS $$
 DECLARE
@@ -436,9 +447,9 @@ BEGIN
     INTO categorical;
     RETURN categorical;
 END;
-$$ LANGUAGE PLPGSQL VOLATILE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL RESTRICTED;
 
-CREATE OR REPLACE FUNCTION _cdb_mode_of_array(anyarray)
+CREATE OR REPLACE FUNCTION @extschema@._cdb_mode_of_array(anyarray)
   RETURNS anyelement AS
 $$
     SELECT a
@@ -447,13 +458,14 @@ $$
     ORDER BY COUNT(1) DESC, 1
     LIMIT 1;
 $$
-LANGUAGE SQL IMMUTABLE;
+LANGUAGE SQL IMMUTABLE PARALLEL SAFE;
 
-DROP AGGREGATE IF EXISTS _cdb_mode(anyelement);
-CREATE AGGREGATE _cdb_mode(anyelement) (
+DROP AGGREGATE IF EXISTS @extschema@._cdb_mode(anyelement);
+CREATE AGGREGATE @extschema@._cdb_mode(anyelement) (
   SFUNC=array_append,
   STYPE=anyarray,
-  FINALFUNC=_cdb_mode_of_array,
+  FINALFUNC=@extschema@._cdb_mode_of_array,
+  PARALLEL = SAFE,
   INITCOND='{}'
 );
 
@@ -465,7 +477,7 @@ CREATE AGGREGATE _cdb_mode(anyelement) (
 --   table_alias: (optional) table qualifier for the column to be aggregated
 -- Return SQL subexpression as text with aggregated attribute aliased
 -- with its original name.
-CREATE OR REPLACE FUNCTION _CDB_Attribute_Aggregation_Expression(reloid REGCLASS, column_name TEXT, table_alias TEXT DEFAULT '')
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Attribute_Aggregation_Expression(reloid REGCLASS, column_name TEXT, table_alias TEXT DEFAULT '')
 RETURNS TEXT
 AS $$
 DECLARE
@@ -482,10 +494,10 @@ BEGIN
     qualified_column := Format('%I', column_name);
   END IF;
 
-  column_type := CDB_ColumnType(reloid, column_name);
+  column_type := @extschema@.CDB_ColumnType(reloid, column_name);
 
   SELECT EXISTS (
-    SELECT * FROM CDB_ColumnNames(reloid)  as colname WHERE colname = '_feature_count'
+    SELECT * FROM @extschema@.CDB_ColumnNames(reloid)  as colname WHERE colname = '_feature_count'
   ) INTO has_counter_column;
   IF has_counter_column THEN
     feature_count := '_feature_count';
@@ -495,24 +507,24 @@ BEGIN
     total_feature_count := 'count(*)';
   END IF;
 
-  base_table := _CDB_OverviewBaseTable(reloid);
+  base_table := @extschema@._CDB_OverviewBaseTable(reloid);
 
   CASE column_type
   WHEN 'double precision', 'real', 'integer', 'bigint', 'numeric' THEN
     IF column_name = '_feature_count' THEN
       RETURN 'SUM(_feature_count)';
     ELSE
-      IF column_type = 'integer' AND _cdb_categorical_column(base_table, column_name) THEN
+      IF column_type = 'integer' AND @extschema@._cdb_categorical_column(base_table, column_name) THEN
         RETURN Format('CDB_Math_Mode(%s)::', qualified_column) || column_type;
       ELSE
         RETURN Format('SUM(%s*%s)/%s::' || column_type, qualified_column, feature_count, total_feature_count);
       END IF;
     END IF;
   WHEN 'text', 'character varying', 'character' THEN
-    IF _cdb_categorical_column(base_table, column_name) THEN
+    IF @extschema@._cdb_categorical_column(base_table, column_name) THEN
       RETURN Format('_cdb_mode(%s)::', qualified_column) || column_type;
     ELSE
-      IF _cdb_unlimited_text_column(base_table, column_name) THEN
+      IF @extschema@._cdb_unlimited_text_column(base_table, column_name) THEN
         -- TODO: this should not be applied to columns containing largish text;
         -- it is intended only to short names/identifiers
         RETURN  'CASE WHEN count(distinct ' || qualified_column || ') = 1 THEN MIN(' || qualified_column || ') WHEN ' || total_feature_count || ' < 5 THEN string_agg(distinct ' || qualified_column || ','' / '') ELSE ''*'' END::' || column_type;
@@ -526,7 +538,7 @@ BEGIN
     RETURN 'CASE count(*) WHEN 1 THEN MIN(' || qualified_column || ') ELSE NULL END::' || column_type;
   END CASE;
 END
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL RESTRICTED;
 
 -- List of dataset aggregated attributes as a comma-separated SQL expression.
 -- Scope: private.
@@ -534,34 +546,34 @@ $$ LANGUAGE PLPGSQL IMMUTABLE;
 --   reloid: oid of the input table. It must be a cartodbfy'ed table.
 --   table_alias: (optional) table qualifier for the columns to be aggregated
 -- Return value: SQL subexpression as text
-CREATE OR REPLACE FUNCTION _CDB_Aggregated_Attributes_Expression(reloid REGCLASS, table_alias TEXT DEFAULT '')
+CREATE OR REPLACE FUNCTION @extschema@._CDB_Aggregated_Attributes_Expression(reloid REGCLASS, table_alias TEXT DEFAULT '')
 RETURNS TEXT
 AS $$
 DECLARE
   attr_list TEXT;
 BEGIN
-  SELECT string_agg(_CDB_Attribute_Aggregation_Expression(reloid, s.c, table_alias) || Format(' AS %s', s.c), ',')
+  SELECT string_agg(@extschema@._CDB_Attribute_Aggregation_Expression(reloid, s.c, table_alias) || Format(' AS %s', s.c), ',')
   FROM (
-    SELECT * FROM _CDB_Aggregable_Attributes(reloid) c
+    SELECT @extschema@._CDB_Aggregable_Attributes(reloid)::text c
   ) AS s INTO attr_list;
 
   RETURN attr_list;
 END
-$$ LANGUAGE PLPGSQL STABLE;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL RESTRICTED;
 
 -- Array of geometry types detected in a cartodbfied table
 -- For effciency only look at a limited number of rwos.
 -- Parameters
 --   reloid: oid of the input table. It must be a cartodbfy'ed table.
 -- Return value: array of geometry type names
-CREATE OR REPLACE FUNCTION _CDB_GeometryTypes(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_GeometryTypes(reloid REGCLASS)
 RETURNS TEXT[]
 AS $$
 DECLARE
   gtypes TEXT[];
 BEGIN
   EXECUTE Format('
-    SELECT array_agg(DISTINCT ST_GeometryType(the_geom)) FROM (
+    SELECT array_agg(DISTINCT @postgisschema@.ST_GeometryType(the_geom)) FROM (
       SELECT the_geom FROM %s
         WHERE (the_geom is not null) LIMIT 10
     ) as geom_types
@@ -569,7 +581,7 @@ BEGIN
   INTO gtypes;
   RETURN gtypes;
 END
-$$ LANGUAGE PLPGSQL STABLE;
+$$ LANGUAGE PLPGSQL STABLE PARALLEL SAFE;
 
 -- Experimental Overview reduction method for point datasets.
 -- It clusters the points using a grid, then aggregates the point in each
@@ -581,7 +593,7 @@ $$ LANGUAGE PLPGSQL STABLE;
 --   ref_z Z level assigned to the original table
 --   overview_z Z level of the overview to be generated, must be smaller than ref_z
 -- Return value: Name of the generated overview table
-CREATE OR REPLACE FUNCTION _CDB_GridCluster_Reduce_Strategy(reloid REGCLASS, ref_z INTEGER, overview_z INTEGER, grid_px FLOAT8 DEFAULT NULL)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_GridCluster_Reduce_Strategy(reloid REGCLASS, ref_z INTEGER, overview_z INTEGER, grid_px FLOAT8 DEFAULT NULL, has_overview_created BOOLEAN DEFAULT FALSE)
 RETURNS REGCLASS
 AS $$
   DECLARE
@@ -602,8 +614,10 @@ AS $$
     schema_name TEXT;
     table_name TEXT;
     point_geom TEXT;
+    overview_table_name TEXT;
+    creation_clause TEXT;
   BEGIN
-    SELECT _CDB_GeometryTypes(reloid) INTO gtypes;
+    SELECT @extschema@._CDB_GeometryTypes(reloid) INTO gtypes;
     IF gtypes IS NULL OR array_upper(gtypes, 1) <> 1 OR gtypes[1] <> 'ST_Point' THEN
       -- This strategy only supports datasets with point geomety
       RETURN NULL;
@@ -611,22 +625,22 @@ AS $$
 
     --TODO: check applicability: geometry type, minimum number of points...
 
-    overview_rel := _CDB_Overview_Name(reloid, ref_z, overview_z);
+    overview_rel := @extschema@._CDB_Overview_Name(reloid, ref_z, overview_z);
 
     -- Grid size in pixels at Z level overview_z
     IF grid_px IS NULL THEN
       grid_px := 1.0;
     END IF;
 
-    SELECT * FROM _cdb_split_table_name(reloid) INTO schema_name, table_name;
+    SELECT * FROM @extschema@._cdb_split_table_name(reloid) INTO schema_name, table_name;
 
     -- pixel_m: size of a pixel in webmercator units (meters)
-    SELECT CDB_XYZ_Resolution(overview_z) INTO pixel_m;
+    SELECT @extschema@.CDB_XYZ_Resolution(overview_z) INTO pixel_m;
     -- grid size in meters
     grid_m = grid_px * pixel_m;
 
-    attributes := _CDB_Aggregable_Attributes_Expression(reloid);
-    aggr_attributes := _CDB_Aggregated_Attributes_Expression(reloid);
+    attributes := @extschema@._CDB_Aggregable_Attributes_Expression(reloid);
+    aggr_attributes := @extschema@._CDB_Aggregated_Attributes_Expression(reloid);
     IF attributes <> '' THEN
       attributes := ', ' || attributes;
     END IF;
@@ -648,7 +662,7 @@ AS $$
       offset_y := Format('%2$s/2 - MOD((%1$s)::numeric, (%2$s)::numeric)::float8', cell_y, pixel_m);
     END IF;
 
-    point_geom := Format('ST_SetSRID(ST_MakePoint(%1$s + %3$s, %2$s + %4$s), 3857)', cell_x, cell_y, offset_x, offset_y);
+    point_geom := Format('@postgisschema@.ST_SetSRID(@postgisschema@.ST_MakePoint(%1$s + %3$s, %2$s + %4$s), 3857)', cell_x, cell_y, offset_x, offset_y);
 
     -- compute the resulting columns in the same order as in the base table
     WITH cols AS (
@@ -656,10 +670,137 @@ AS $$
         CASE c
         WHEN 'cartodb_id' THEN 'cartodb_id'
         WHEN 'the_geom' THEN
-          Format('ST_Transform(%s, 4326) AS the_geom', point_geom)
+          Format('@postgisschema@.ST_Transform(%s, 4326) AS the_geom', point_geom)
         WHEN 'the_geom_webmercator' THEN
            Format('%s AS the_geom_webmercator', point_geom)
-        ELSE c
+        ELSE c::text
+        END AS column
+        FROM @extschema@.CDB_ColumnNames(reloid) c
+    )
+    SELECT string_agg(s.column, ',') FROM (
+      SELECT * FROM cols
+    ) AS s INTO columns;
+
+    IF NOT columns LIKE '%_feature_count%' THEN
+      columns := columns || ', n AS _feature_count';
+    END IF;
+
+    overview_table_name := Format('%I.%I', schema_name, overview_rel);
+    IF has_overview_created THEN
+      RAISE NOTICE 'Grid cluster strategy deleting and inserting because % has overviews', overview_table_name;
+      EXECUTE Format('DELETE FROM %s;', overview_table_name);
+      creation_clause := Format('INSERT INTO %s', overview_table_name);
+    ELSE
+      RAISE NOTICE 'Grid cluster strategy creating a new table overview %', overview_table_name;
+      creation_clause := Format('CREATE TABLE %s AS', overview_table_name);
+    END IF;
+
+    -- Now we cluster the data using a grid of size grid_m
+    -- and selecte the centroid (average coordinates) of each cluster.
+    -- If we had a selected numeric attribute of interest we could use it
+    -- as a weight for the average coordinates.
+    EXECUTE Format('
+      %3$s
+         WITH clusters AS (
+           SELECT
+             %5$s
+             count(*) AS n,
+             Floor(@postgisschema@.ST_X(f.the_geom_webmercator)/%2$s)::int AS gx,
+             Floor(@postgisschema@.ST_Y(f.the_geom_webmercator)/%2$s)::int AS gy,
+             MIN(cartodb_id) AS cartodb_id
+          FROM %1$s f
+          WHERE f.the_geom_webmercator IS NOT NULL
+          GROUP BY gx, gy
+         )
+         SELECT %6$s FROM clusters
+    ', reloid::text, grid_m, creation_clause, attributes, aggr_attributes, columns);
+
+    RETURN Format('%s', overview_table_name)::regclass;
+  END;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+-- This strategy places the aggregation of each cluster at the centroid of the cluster members.
+CREATE OR REPLACE FUNCTION @extschema@._CDB_GridClusterCentroid_Reduce_Strategy(reloid REGCLASS, ref_z INTEGER, overview_z INTEGER, grid_px FLOAT8 DEFAULT NULL, has_overview_created BOOLEAN DEFAULT FALSE)
+RETURNS REGCLASS
+AS $$
+  DECLARE
+    overview_rel TEXT;
+    reduction FLOAT8;
+    base_name TEXT;
+    pixel_m FLOAT8;
+    grid_m FLOAT8;
+    offset_m FLOAT8;
+    offset_x TEXT;
+    offset_y TEXT;
+    cell_x TEXT;
+    cell_y TEXT;
+    aggr_attributes TEXT;
+    attributes TEXT;
+    columns TEXT;
+    gtypes TEXT[];
+    schema_name TEXT;
+    table_name TEXT;
+    point_geom TEXT;
+    overview_table_name TEXT;
+    creation_clause TEXT;
+  BEGIN
+    SELECT @extschema@._CDB_GeometryTypes(reloid) INTO gtypes;
+    IF gtypes IS NULL OR array_upper(gtypes, 1) <> 1 OR gtypes[1] <> 'ST_Point' THEN
+      -- This strategy only supports datasets with point geomety
+      RETURN NULL;
+    END IF;
+
+    --TODO: check applicability: geometry type, minimum number of points...
+
+    overview_rel := @extschema@._CDB_Overview_Name(reloid, ref_z, overview_z);
+
+    -- Grid size in pixels at Z level overview_z
+    IF grid_px IS NULL THEN
+      grid_px := 1.0;
+    END IF;
+
+    SELECT * FROM @extschema@._cdb_split_table_name(reloid) INTO schema_name, table_name;
+
+    -- pixel_m: size of a pixel in webmercator units (meters)
+    SELECT @extschema@.CDB_XYZ_Resolution(overview_z) INTO pixel_m;
+    -- grid size in meters
+    grid_m = grid_px * pixel_m;
+
+    attributes := @extschema@._CDB_Aggregable_Attributes_Expression(reloid);
+    aggr_attributes := @extschema@._CDB_Aggregated_Attributes_Expression(reloid);
+    IF attributes <> '' THEN
+      attributes := ', ' || attributes;
+    END IF;
+    IF aggr_attributes <> '' THEN
+      aggr_attributes := aggr_attributes || ', ';
+    END IF;
+
+    -- Center of each cell:
+    cell_x := Format('gx*%1$s + %2$s', grid_m, grid_m/2);
+    cell_y := Format('gy*%1$s + %2$s', grid_m, grid_m/2);
+
+    -- Displacement to the nearest pixel center:
+    IF MOD(grid_px::numeric, 1.0::numeric) = 0 THEN
+      offset_m := pixel_m/2 - MOD((grid_m/2)::numeric, pixel_m::numeric)::float8;
+      offset_x := Format('%s', offset_m);
+      offset_y := Format('%s', offset_m);
+    ELSE
+      offset_x := Format('%2$s/2 - MOD((%1$s)::numeric, (%2$s)::numeric)::float8', cell_x, pixel_m);
+      offset_y := Format('%2$s/2 - MOD((%1$s)::numeric, (%2$s)::numeric)::float8', cell_y, pixel_m);
+    END IF;
+
+    point_geom := Format('@postgisschema@.ST_SetSRID(@postgisschema@.ST_MakePoint(%1$s + %3$s, %2$s + %4$s), 3857)', cell_x, cell_y, offset_x, offset_y);
+
+    -- compute the resulting columns in the same order as in the base table
+    WITH cols AS (
+      SELECT
+        CASE c
+        WHEN 'cartodb_id' THEN 'cartodb_id'
+        WHEN 'the_geom' THEN
+          '@postgisschema@.ST_Transform(@postgisschema@.ST_SetSRID(@postgisschema@.ST_MakePoint(_sum_of_x/n, _sum_of_y/n), 3857), 4326) AS the_geom'
+        WHEN 'the_geom_webmercator' THEN
+          '@postgisschema@.ST_SetSRID(@postgisschema@.ST_MakePoint(_sum_of_x/n, _sum_of_y/n), 3857) AS the_geom_webmercator'
+        ELSE c::text
         END AS column
         FROM CDB_ColumnNames(reloid) c
     )
@@ -671,31 +812,166 @@ AS $$
       columns := columns || ', n AS _feature_count';
     END IF;
 
-    EXECUTE Format('DROP TABLE IF EXISTS %I.%I CASCADE;', schema_name, overview_rel);
+    overview_table_name := Format('%I.%I', schema_name, overview_rel);
+    IF has_overview_created THEN
+      RAISE NOTICE 'Grid cluster centroid strategy deleting and inserting because % has overviews', overview_table_name;
+      EXECUTE Format('DELETE FROM %s;', overview_table_name);
+      creation_clause := Format('INSERT INTO %s', overview_table_name);
+    ELSE
+      RAISE NOTICE 'Grid cluster centroid strategy creating a new table overview %', overview_table_name;
+      creation_clause := Format('CREATE TABLE %s AS', overview_table_name);
+    END IF;
 
     -- Now we cluster the data using a grid of size grid_m
     -- and selecte the centroid (average coordinates) of each cluster.
     -- If we had a selected numeric attribute of interest we could use it
     -- as a weight for the average coordinates.
     EXECUTE Format('
-      CREATE TABLE %7$I.%3$I AS
+      %3$s
          WITH clusters AS (
            SELECT
              %5$s
              count(*) AS n,
-             Floor(ST_X(f.the_geom_webmercator)/%2$s)::int AS gx,
-             Floor(ST_Y(f.the_geom_webmercator)/%2$s)::int AS gy,
+             SUM(@postgisschema@.ST_X(f.the_geom_webmercator)) AS _sum_of_x,
+             SUM(@postgisschema@.ST_Y(f.the_geom_webmercator)) AS _sum_of_y,
+             Floor(@postgisschema@.ST_Y(f.the_geom_webmercator)/%2$s)::int AS gy,
+             Floor(@postgisschema@.ST_X(f.the_geom_webmercator)/%2$s)::int AS gx,
              MIN(cartodb_id) AS cartodb_id
           FROM %1$s f
-          WHERE f.the_geom_webmercator IS NOT NULL
           GROUP BY gx, gy
          )
          SELECT %6$s FROM clusters
-    ', reloid::text, grid_m, overview_rel, attributes, aggr_attributes, columns, schema_name);
+    ', reloid::text, grid_m, creation_clause, attributes, aggr_attributes, columns);
 
-    RETURN Format('%I.%I', schema_name, overview_rel)::regclass;
+    RETURN Format('%s', overview_table_name)::regclass;
   END;
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
+
+-- This strategy places the aggregation of each cluster at the position of one of the cluster members.
+CREATE OR REPLACE FUNCTION @extschema@._CDB_GridClusterSample_Reduce_Strategy(reloid REGCLASS, ref_z INTEGER, overview_z INTEGER, grid_px FLOAT8 DEFAULT NULL, has_overview_created BOOLEAN DEFAULT FALSE)
+RETURNS REGCLASS
+AS $$
+  DECLARE
+    overview_rel TEXT;
+    reduction FLOAT8;
+    base_name TEXT;
+    pixel_m FLOAT8;
+    grid_m FLOAT8;
+    offset_m FLOAT8;
+    offset_x TEXT;
+    offset_y TEXT;
+    cell_x TEXT;
+    cell_y TEXT;
+    aggr_attributes TEXT;
+    attributes TEXT;
+    columns TEXT;
+    gtypes TEXT[];
+    schema_name TEXT;
+    table_name TEXT;
+    point_geom TEXT;
+    overview_table_name TEXT;
+    creation_clause TEXT;
+  BEGIN
+    SELECT @extschema@._CDB_GeometryTypes(reloid) INTO gtypes;
+    IF gtypes IS NULL OR array_upper(gtypes, 1) <> 1 OR gtypes[1] <> 'ST_Point' THEN
+      -- This strategy only supports datasets with point geomety
+      RETURN NULL;
+    END IF;
+
+    --TODO: check applicability: geometry type, minimum number of points...
+
+    overview_rel := @extschema@._CDB_Overview_Name(reloid, ref_z, overview_z);
+
+    -- Grid size in pixels at Z level overview_z
+    IF grid_px IS NULL THEN
+      grid_px := 1.0;
+    END IF;
+
+    SELECT * FROM @extschema@._cdb_split_table_name(reloid) INTO schema_name, table_name;
+
+    -- pixel_m: size of a pixel in webmercator units (meters)
+    SELECT @extschema@.CDB_XYZ_Resolution(overview_z) INTO pixel_m;
+    -- grid size in meters
+    grid_m = grid_px * pixel_m;
+
+    attributes := @extschema@._CDB_Aggregable_Attributes_Expression(reloid);
+    aggr_attributes := @extschema@._CDB_Aggregated_Attributes_Expression(reloid);
+    IF attributes <> '' THEN
+      attributes := ', ' || attributes;
+    END IF;
+    IF aggr_attributes <> '' THEN
+      aggr_attributes := aggr_attributes || ', ';
+    END IF;
+
+    -- Center of each cell:
+    cell_x := Format('gx*%1$s + %2$s', grid_m, grid_m/2);
+    cell_y := Format('gy*%1$s + %2$s', grid_m, grid_m/2);
+
+    -- Displacement to the nearest pixel center:
+    IF MOD(grid_px::numeric, 1.0::numeric) = 0 THEN
+      offset_m := pixel_m/2 - MOD((grid_m/2)::numeric, pixel_m::numeric)::float8;
+      offset_x := Format('%s', offset_m);
+      offset_y := Format('%s', offset_m);
+    ELSE
+      offset_x := Format('%2$s/2 - MOD((%1$s)::numeric, (%2$s)::numeric)::float8', cell_x, pixel_m);
+      offset_y := Format('%2$s/2 - MOD((%1$s)::numeric, (%2$s)::numeric)::float8', cell_y, pixel_m);
+    END IF;
+
+    point_geom := Format('@postgisschema@.ST_SetSRID(@postgisschema@.ST_MakePoint(%1$s + %3$s, %2$s + %4$s), 3857)', cell_x, cell_y, offset_x, offset_y);
+
+    -- compute the resulting columns in the same order as in the base table
+    WITH cols AS (
+      SELECT
+        CASE c
+        WHEN 'cartodb_id' THEN 'cartodb_id'
+        ELSE c::text
+        END AS column
+        FROM @extschema@.CDB_ColumnNames(reloid) c
+    )
+    SELECT string_agg(s.column, ',') FROM (
+      SELECT * FROM cols
+    ) AS s INTO columns;
+
+    IF NOT columns LIKE '%_feature_count%' THEN
+      columns := columns || ', n AS _feature_count';
+    END IF;
+
+    overview_table_name := Format('%I.%I', schema_name, overview_rel);
+    IF has_overview_created THEN
+      RAISE NOTICE 'Grid cluster sampling strategy deleting and inserting because % has overviews', overview_table_name;
+      EXECUTE Format('DELETE FROM %s;', overview_table_name);
+      creation_clause := Format('INSERT INTO %s', overview_table_name);
+    ELSE
+      RAISE NOTICE 'Grid cluster sampling strategy creating a new table overview %', overview_table_name;
+      creation_clause := Format('CREATE TABLE %s AS', overview_table_name);
+    END IF;
+
+    -- Now we cluster the data using a grid of size grid_m
+    -- and select the centroid (average coordinates) of each cluster.
+    -- If we had a selected numeric attribute of interest we could use it
+    -- as a weight for the average coordinates.
+    EXECUTE Format('
+       %3$s
+         WITH clusters AS (
+           SELECT
+             %5$s
+             count(*) AS n,
+             Floor(@postgisschema@.ST_X(_f.the_geom_webmercator)/%2$s)::int AS gx,
+             Floor(@postgisschema@.ST_Y(_f.the_geom_webmercator)/%2$s)::int AS gy,
+             MIN(cartodb_id) AS cartodb_id
+          FROM %1$s _f
+          GROUP BY gx, gy
+         ),
+         cluster_geom AS (
+           SELECT the_geom, the_geom_webmercator, clusters.*
+             FROM clusters INNER JOIN %1$s _g ON (clusters.cartodb_id = _g.cartodb_id)
+         )
+         SELECT %6$s FROM cluster_geom
+    ', reloid::text, grid_m, creation_clause, attributes, aggr_attributes, columns);
+
+    RETURN Format('%s', overview_table_name)::regclass;
+  END;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Create overview tables for a dataset.
 -- Scope: public
@@ -708,7 +984,7 @@ $$ LANGUAGE PLPGSQL;
 --                    created by the strategy must have the same columns
 --                    as the base table and in the same order.
 -- Return value: Array with the names of the generated overview tables
-CREATE OR REPLACE FUNCTION CDB_CreateOverviews(reloid REGCLASS, refscale_strategy regproc DEFAULT '_CDB_Feature_Density_Ref_Z_Strategy(REGCLASS,FLOAT8)'::regprocedure, reduce_strategy regproc DEFAULT '_CDB_GridCluster_Reduce_Strategy(REGCLASS,INTEGER,INTEGER,FLOAT8)'::regprocedure)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_CreateOverviews(reloid REGCLASS, refscale_strategy regproc DEFAULT '@extschema@._CDB_Feature_Density_Ref_Z_Strategy(REGCLASS,FLOAT8)'::regprocedure, reduce_strategy regproc DEFAULT '@extschema@._CDB_GridCluster_Reduce_Strategy(REGCLASS,INTEGER,INTEGER,FLOAT8,BOOLEAN)'::regprocedure)
 RETURNS text[]
 AS $$
 DECLARE
@@ -716,12 +992,12 @@ DECLARE
 BEGIN
   -- Use the default tolerance
   tolerance_px := 1.0;
-  RETURN CDB_CreateOverviewsWithToleranceInPixels(reloid, tolerance_px, refscale_strategy, reduce_strategy);
+  RETURN @extschema@.CDB_CreateOverviewsWithToleranceInPixels(reloid, tolerance_px, refscale_strategy, reduce_strategy);
 END;
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
 -- Create overviews with additional parameter to define the desired detail/tolerance in pixels
-CREATE OR REPLACE FUNCTION CDB_CreateOverviewsWithToleranceInPixels(reloid REGCLASS, tolerance_px FLOAT8, refscale_strategy regproc DEFAULT '_CDB_Feature_Density_Ref_Z_Strategy(REGCLASS,FLOAT8)'::regprocedure, reduce_strategy regproc DEFAULT  '_CDB_GridCluster_Reduce_Strategy(REGCLASS,INTEGER,INTEGER,FLOAT8)'::regprocedure)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_CreateOverviewsWithToleranceInPixels(reloid REGCLASS, tolerance_px FLOAT8, refscale_strategy regproc DEFAULT '@extschema@._CDB_Feature_Density_Ref_Z_Strategy(REGCLASS,FLOAT8)'::regprocedure, reduce_strategy regproc DEFAULT '@extschema@._CDB_GridCluster_Reduce_Strategy(REGCLASS,INTEGER,INTEGER,FLOAT8,BOOLEAN)'::regprocedure)
 RETURNS text[]
 AS $$
 DECLARE
@@ -733,6 +1009,7 @@ DECLARE
   overview_tables REGCLASS[];
   overviews_step integer := 1;
   has_counter_column boolean;
+  has_overviews_for_z boolean;
 BEGIN
   -- Determine the referece zoom level
   EXECUTE 'SELECT ' || quote_ident(refscale_strategy::text) || Format('(''%s'', %s);', reloid, tolerance_px) INTO ref_z;
@@ -749,22 +1026,30 @@ BEGIN
     overview_z := overview_z - overviews_step;
   END LOOP;
 
-  -- Create overlay tables
+  --  TODO Check for non-used overview to delete them but we have to be aware that the
+  --       current queries, for example from a tiler, are been used with the old overviews
+  --       so if we remove the overviews in the process this could lead to errors
+
+  -- Create or reganerate overlay tables
   base_z := ref_z;
   base_rel := reloid;
   FOREACH overview_z IN ARRAY overviews_z LOOP
-    EXECUTE 'SELECT ' || quote_ident(reduce_strategy::text) || Format('(''%s'', %s, %s, %s);', base_rel, base_z, overview_z, tolerance_px) INTO base_rel;
+    SELECT CASE WHEN count(*) > 0 THEN TRUE ELSE FALSE END from CDB_Overviews(reloid) WHERE z = overview_z INTO has_overviews_for_z;
+    EXECUTE 'SELECT ' || quote_ident(reduce_strategy::text) || Format('(''%s'', %s, %s, %s, ''%s'');', base_rel, base_z, overview_z, tolerance_px, has_overviews_for_z) INTO base_rel;
     IF base_rel IS NULL THEN
       EXIT;
     END IF;
     base_z := overview_z;
-    PERFORM _CDB_Register_Overview(reloid, base_rel, base_z);
+    IF NOT has_overviews_for_z THEN
+      RAISE NOTICE 'Registering overview: %', base_rel;
+      PERFORM _CDB_Register_Overview(reloid, base_rel, base_z);
+    END IF;
     SELECT array_append(overview_tables, base_rel) INTO overview_tables;
   END LOOP;
 
   IF overview_tables IS NOT NULL AND array_length(overview_tables, 1) > 0 THEN
     SELECT EXISTS (
-      SELECT * FROM CDB_ColumnNames(reloid)  as colname WHERE colname = '_feature_count'
+      SELECT * FROM @extschema@.CDB_ColumnNames(reloid)  as colname WHERE colname = '_feature_count'
     ) INTO has_counter_column;
     IF NOT has_counter_column THEN
       EXECUTE Format('
@@ -775,11 +1060,15 @@ BEGIN
 
   RETURN overview_tables;
 END;
-$$ LANGUAGE PLPGSQL;
+$$ LANGUAGE PLPGSQL VOLATILE PARALLEL UNSAFE;
 
--- Here are some older signatures of these functions, no longar in use.
+-- Here are some older signatures of these functions, no longer in use.
 -- They must be droped here, after the (new) definition of the function `CDB_CreateOverviews`
 -- because that function used to contain references to them in the default argument values.
-DROP FUNCTION IF EXISTS _CDB_Feature_Density_Ref_Z_Strategy(REGCLASS);
-DROP FUNCTION IF EXISTS _CDB_GridCluster_Reduce_Strategy(REGCLASS,INTEGER,INTEGER);
-DROP FUNCTION IF EXISTS _CDB_Sampling_Reduce_Strategy(REGCLASS,INTEGER,INTEGER);
+DROP FUNCTION IF EXISTS @extschema@._CDB_Feature_Density_Ref_Z_Strategy(REGCLASS);
+DROP FUNCTION IF EXISTS @extschema@._CDB_GridCluster_Reduce_Strategy(REGCLASS,INTEGER,INTEGER);
+DROP FUNCTION IF EXISTS @extschema@._CDB_GridCluster_Reduce_Strategy(REGCLASS,INTEGER,INTEGER,FLOAT8);
+DROP FUNCTION IF EXISTS @extschema@._CDB_GridClusterCentroid_Reduce_Strategy(REGCLASS, INTEGER, INTEGER, FLOAT8);
+DROP FUNCTION IF EXISTS @extschema@._CDB_GridClusterSample_Reduce_Strategy(REGCLASS, INTEGER, INTEGER, FLOAT8);
+DROP FUNCTION IF EXISTS @extschema@._CDB_Sampling_Reduce_Strategy(REGCLASS,INTEGER,INTEGER);
+DROP FUNCTION IF EXISTS @extschema@._CDB_Sampling_Reduce_Strategy(REGCLASS,INTEGER,INTEGER,FLOAT8);

scripts-available/CDB_OverviewsSupport.sql

@@ -1,7 +1,7 @@
 -- Auxiliary overviews FUNCTIONS
 
 -- Maximum zoom level for which overviews may be created
-CREATE OR REPLACE FUNCTION _CDB_MaxOverviewLevel()
+CREATE OR REPLACE FUNCTION @extschema@._CDB_MaxOverviewLevel()
 RETURNS INTEGER
 AS $$
   BEGIN
@@ -15,23 +15,23 @@ AS $$
     -- (gridding), so we'll limit Z to a maximum of 31 - 8
     RETURN 23;
   END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 
 -- Maximum zoom level usable with integer coordinates
-CREATE OR REPLACE FUNCTION _CDB_MaxZoomLevel()
+CREATE OR REPLACE FUNCTION @extschema@._CDB_MaxZoomLevel()
 RETURNS INTEGER
 AS $$
   BEGIN
     RETURN 31;
   END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 
 -- Information about tables in a schema.
 -- If the schema name parameter is NULL, then tables from all schemas
 -- that may contain user tables are returned.
 -- For each table, the regclass, schema name and table name are returned.
 -- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_UserTablesInSchema(schema_name text DEFAULT NULL)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_UserTablesInSchema(schema_name text DEFAULT NULL)
 RETURNS TABLE(table_regclass REGCLASS, schema_name TEXT, table_name TEXT)
 AS $$
   SELECT
@@ -41,82 +41,82 @@ AS $$
   FROM pg_class c
   JOIN pg_namespace n ON n.oid = c.relnamespace
   WHERE c.relkind = 'r'
-  AND c.relname NOT IN ('cdb_tablemetadata', 'spatial_ref_sys')
+  AND c.relname NOT IN ('cdb_tablemetadata', 'cdb_analysis_catalog', 'cdb_conf', 'spatial_ref_sys')
   AND CASE WHEN schema_name IS NULL
-             THEN n.nspname NOT IN ('pg_catalog', 'information_schema', 'topology', 'cartodb')
+             THEN n.nspname NOT IN ('pg_catalog', 'information_schema', 'topology', '@extschema@')
            ELSE n.nspname = schema_name
            END;
-$$ LANGUAGE 'sql';
+$$ LANGUAGE 'sql' STABLE PARALLEL SAFE;
 
 -- Pattern that can be used to detect overview tables and Extract
 -- the intended zoom level from the table name.
 -- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_OverviewTableDiscriminator()
+CREATE OR REPLACE FUNCTION @extschema@._CDB_OverviewTableDiscriminator()
 RETURNS TEXT
 AS $$
   BEGIN
     RETURN '\A_vovw_(\d+)_';
   END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 -- substring(tablename from _CDB_OverviewTableDiscriminator())
 
 
 -- Pattern matched by the overview tables of a given base table name.
 -- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_OverviewTablePattern(base_table TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_OverviewTablePattern(base_table TEXT)
 RETURNS TEXT
 AS $$
   BEGIN
-    RETURN _CDB_OverviewTableDiscriminator() || base_table;
+    RETURN @extschema@._CDB_OverviewTableDiscriminator() || base_table;
   END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 -- tablename SIMILAR TO _CDB_OverviewTablePattern(base_table)
 
 -- Name of an overview table, given the base table name and the Z level
 -- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_OverviewTableName(base_table TEXT, z INTEGER)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_OverviewTableName(base_table TEXT, z INTEGER)
 RETURNS TEXT
 AS $$
   BEGIN
     RETURN '_vovw_' || z::text || '_' || base_table;
   END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 
 -- Condition to check if a tabla is an overview table of some base table
 -- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_IsOverviewTableOf(base_table TEXT, otable TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_IsOverviewTableOf(base_table TEXT, otable TEXT)
 RETURNS BOOLEAN
 AS $$
   BEGIN
-    RETURN otable SIMILAR TO _CDB_OverviewTablePattern(base_table);
+    RETURN otable SIMILAR TO @extschema@._CDB_OverviewTablePattern(base_table);
   END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 
 -- Extract the Z level from an overview table name
 -- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_OverviewTableZ(otable TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_OverviewTableZ(otable TEXT)
 RETURNS INTEGER
 AS $$
   BEGIN
-    RETURN substring(otable from _CDB_OverviewTableDiscriminator())::integer;
+    RETURN substring(otable from @extschema@._CDB_OverviewTableDiscriminator())::integer;
   END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 
 -- Name of the base table corresponding to an overview table
 -- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_OverviewBaseTableName(overview_table TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_OverviewBaseTableName(overview_table TEXT)
 RETURNS TEXT
 AS $$
   BEGIN
-    IF _CDB_OverviewTableZ(overview_table) IS NULL THEN
+    IF @extschema@._CDB_OverviewTableZ(overview_table) IS NULL THEN
       RETURN overview_table;
     ELSE
-      RETURN regexp_replace(overview_table, _CDB_OverviewTableDiscriminator(), '');
+      RETURN regexp_replace(overview_table, @extschema@._CDB_OverviewTableDiscriminator(), '');
     END IF;
   END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 
-CREATE OR REPLACE FUNCTION _CDB_OverviewBaseTable(overview_table REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_OverviewBaseTable(overview_table REGCLASS)
 RETURNS REGCLASS
 AS $$
   DECLARE
@@ -125,8 +125,8 @@ AS $$
     base_name TEXT;
     base_table REGCLASS;
   BEGIN
-    SELECT * FROM _cdb_split_table_name(overview_table) INTO schema_name, table_name;
-    base_name := _CDB_OverviewBaseTableName(table_name);
+    SELECT * FROM @extschema@._cdb_split_table_name(overview_table) INTO schema_name, table_name;
+    base_name := @extschema@._CDB_OverviewBaseTableName(table_name);
     IF base_name != table_name THEN
       base_table := Format('%I.%I', schema_name, base_name)::regclass;
     ELSE
@@ -134,7 +134,7 @@ AS $$
     END IF;
     RETURN base_table;
   END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 
 -- Schema and relation names of a table given its reloid
 -- Scope: private.
@@ -142,7 +142,7 @@ $$ LANGUAGE PLPGSQL IMMUTABLE;
 --   reloid: oid of the table.
 -- Return (schema_name, table_name)
 -- note that returned names will be quoted if necessary
-CREATE OR REPLACE FUNCTION _cdb_split_table_name(reloid REGCLASS, OUT schema_name TEXT, OUT table_name TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._cdb_split_table_name(reloid REGCLASS, OUT schema_name TEXT, OUT table_name TEXT)
 AS $$
   BEGIN
     SELECT n.nspname, c.relname
@@ -150,7 +150,7 @@ AS $$
     FROM pg_class c JOIN pg_namespace n ON c.relnamespace = n.oid
     WHERE c.oid = reloid;
   END
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;
 
 -- Schema and relation names of a table given its reloid
 -- Scope: private.
@@ -158,7 +158,7 @@ $$ LANGUAGE PLPGSQL IMMUTABLE;
 --   reloid: oid of the table.
 -- Return (schema_name, table_name)
 -- note that returned names will be quoted if necessary
-CREATE OR REPLACE FUNCTION _cdb_schema_name(reloid REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._cdb_schema_name(reloid REGCLASS)
 RETURNS TEXT
 AS $$
   DECLARE
@@ -170,4 +170,4 @@ AS $$
     WHERE c.oid = reloid;
     RETURN schema_name;
   END
-$$ LANGUAGE PLPGSQL IMMUTABLE;
+$$ LANGUAGE PLPGSQL IMMUTABLE PARALLEL SAFE;

scripts-available/CDB_QuantileBins.sql

@@ -5,39 +5,14 @@
 --            bins based on the Quantile method.
 --
 -- @param breaks The number of bins you want to find.
---  
 --
-CREATE OR REPLACE FUNCTION CDB_QuantileBins ( in_array NUMERIC[], breaks INT) RETURNS NUMERIC[] as $$ 
-DECLARE 
-    element_count INT4; 
-    break_size numeric;
-    tmp_val numeric; 
-    i INT := 1; 
-    reply numeric[]; 
-BEGIN 
-    -- sort our values
-    SELECT array_agg(e) INTO in_array FROM (SELECT unnest(in_array) e ORDER BY e ASC) x;
-    -- get the total size of our data
-    element_count := array_length(in_array, 1); 
-    break_size :=  element_count::numeric / breaks;
-    -- slice our bread
-    LOOP  
-        IF i < breaks THEN
-            IF break_size * i % 1 > 0 THEN
-                SELECT e INTO tmp_val FROM ( SELECT unnest(in_array) e LIMIT 1 OFFSET ceil(break_size * i) - 1) x;
-            ELSE
-                SELECT avg(e) INTO tmp_val FROM ( SELECT unnest(in_array) e LIMIT 2 OFFSET ceil(break_size * i) - 1 ) x;
-            END IF;
-        ELSIF i = breaks THEN
-            -- select the last value
-            SELECT max(e) INTO tmp_val FROM ( SELECT unnest(in_array) e ) x;
-        ELSE
-            EXIT;
-        END IF;
-
-        reply = array_append(reply, tmp_val);
-        i := i+1;
-    END LOOP;
-    RETURN reply;
-END; 
-$$ language plpgsql IMMUTABLE;
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_QuantileBins(in_array numeric[], breaks int)
+RETURNS numeric[]
+AS $$
+  SELECT
+    percentile_disc(Array(SELECT generate_series(1, breaks) / breaks::numeric))
+    WITHIN GROUP (ORDER BY x ASC) AS p
+  FROM
+    unnest(in_array) AS x;
+$$ language SQL IMMUTABLE STRICT PARALLEL SAFE;

scripts-available/CDB_QueryStatements.sql

@@ -3,7 +3,7 @@
 -- Regexp curtesy of Hubert Lubaczewski (depesz)
 -- Implemented in plpython for performance reasons
 --
-CREATE OR REPLACE FUNCTION CDB_QueryStatements(query text) 
+CREATE OR REPLACE FUNCTION @extschema@.CDB_QueryStatements(query text) 
 RETURNS SETOF TEXT AS $$
   import re
   pat = re.compile( r'''((?:[^'"$;]+|"[^"]*"|'[^']*'|(\$[^$]*\$).*?\2)+)''', re.DOTALL )
@@ -11,4 +11,4 @@ RETURNS SETOF TEXT AS $$
     cleaned = match[0].strip()
     if ( cleaned ):
       yield cleaned
-$$ language 'plpythonu' IMMUTABLE STRICT;
+$$ language '@@plpythonu@@' IMMUTABLE STRICT PARALLEL SAFE;

scripts-available/CDB_QueryTables.sql

@@ -2,7 +2,7 @@
 --
 -- Requires PostgreSQL 9.x+
 --
-CREATE OR REPLACE FUNCTION CDB_QueryTablesText(query text)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_QueryTablesText(query text)
 RETURNS text[]
 AS $$
 DECLARE
@@ -11,19 +11,16 @@ DECLARE
   rec RECORD;
   rec2 RECORD;
 BEGIN
-  
+
   tables := '{}';
 
-  FOR rec IN SELECT CDB_QueryStatements(query) q LOOP
-
-    IF NOT ( rec.q ilike 'select%' or rec.q ilike 'with%' ) THEN
-        --RAISE WARNING 'Skipping %', rec.q;
-        CONTINUE;
-    END IF;
-
+  FOR rec IN SELECT @extschema@.CDB_QueryStatements(query) q LOOP
     BEGIN
       EXECUTE 'EXPLAIN (FORMAT XML, VERBOSE) ' || rec.q INTO STRICT exp;
-    EXCEPTION WHEN others THEN
+    EXCEPTION WHEN syntax_error THEN
+      -- We can get a syntax error if the user tries to EXPLAIN a DDL
+      CONTINUE;
+    WHEN others THEN
       -- TODO: if error is 'relation "xxxxxx" does not exist', take xxxxxx as
       --       the affected table ?
       RAISE WARNING 'CDB_QueryTables cannot explain query: % (%: %)', rec.q, SQLSTATE, SQLERRM;
@@ -64,15 +61,15 @@ BEGIN
 
   return tables;
 END
-$$ LANGUAGE 'plpgsql' VOLATILE STRICT;
+$$ LANGUAGE 'plpgsql' VOLATILE STRICT PARALLEL UNSAFE;
 
 
 -- Keep CDB_QueryTables with same signature for backwards compatibility.
 -- It should probably be removed in the future.
-CREATE OR REPLACE FUNCTION CDB_QueryTables(query text)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_QueryTables(query text)
 RETURNS name[]
 AS $$
 BEGIN
-  RETURN CDB_QueryTablesText(query)::name[];
+  RETURN @extschema@.CDB_QueryTablesText(query)::name[];
 END
-$$ LANGUAGE 'plpgsql' VOLATILE STRICT;
+$$ LANGUAGE 'plpgsql' VOLATILE STRICT PARALLEL UNSAFE;

scripts-available/CDB_Quota.sql

@@ -1,4 +1,4 @@
-CREATE OR REPLACE FUNCTION cartodb._CDB_total_relation_size(_schema_name TEXT, _table_name TEXT)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_total_relation_size(_schema_name TEXT, _table_name TEXT)
 RETURNS bigint AS
 $$
 DECLARE relation_size bigint := 0;
@@ -7,51 +7,63 @@ BEGIN
     SELECT pg_total_relation_size(format('"%s"."%s"', _schema_name, _table_name)) INTO relation_size;
   EXCEPTION
     WHEN undefined_table OR OTHERS THEN
-      RAISE NOTICE 'cartodb._CDB_total_relation_size(''%'', ''%'') caught error: % (%)', _schema_name, _table_name, SQLERRM, SQLSTATE;
+      RAISE NOTICE '@extschema@._CDB_total_relation_size(''%'', ''%'') caught error: % (%)', _schema_name, _table_name, SQLERRM, SQLSTATE;
   END;
   RETURN relation_size;
 END;
 $$
-LANGUAGE 'plpgsql' VOLATILE;
+LANGUAGE 'plpgsql' VOLATILE PARALLEL UNSAFE;
 
 -- Return the estimated size of user data. Used for quota checking.
-CREATE OR REPLACE FUNCTION CDB_UserDataSize(schema_name TEXT)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_UserDataSize(schema_name TEXT)
 RETURNS bigint AS
 $$
 DECLARE
   total_size INT8;
+  raster_available BOOLEAN;
+  raster_read_query TEXT;
 BEGIN
+  -- Postgis 3+ might not install raster
+  raster_available := EXISTS (
+        SELECT 1
+        FROM   pg_views
+        WHERE  schemaname = '@postgisschema@'
+        AND    viewname = 'raster_overviews'
+   );
+
+   IF raster_available THEN
+       raster_read_query := Format('SELECT o_table_name, r_table_name FROM @postgisschema@.raster_overviews
+                        WHERE o_table_schema = %L AND o_table_catalog = current_database()', schema_name);
+   ELSE
+       raster_read_query := 'SELECT NULL::text AS o_table_name, NULL::text AS r_table_name';
+   END IF;
+   EXECUTE Format('
   WITH raster_tables AS (
-    SELECT o_table_name, r_table_name FROM raster_overviews
-      WHERE o_table_schema = schema_name AND o_table_catalog = current_database()
+    %s
   ),
   user_tables AS (
-    SELECT table_name FROM information_schema.tables
-      WHERE table_catalog = current_database() AND table_schema = schema_name
-        AND table_name != 'spatial_ref_sys'
-        AND table_name != 'cdb_tablemetadata'
-        AND table_type = 'BASE TABLE'
+    SELECT table_name FROM @extschema@._CDB_NonAnalysisTablesInSchema(%L)
   ),
   table_cat AS (
     SELECT
       table_name,
       (
         EXISTS(select * from raster_tables where o_table_name = table_name)
-        OR
-        table_name SIMILAR TO _CDB_OverviewTableDiscriminator() || '[\w\d]*'
+        OR table_name SIMILAR TO @extschema@._CDB_OverviewTableDiscriminator() || ''[\w\d]*''
       ) AS is_overview,
       EXISTS(SELECT * FROM raster_tables WHERE r_table_name = table_name) AS is_raster
     FROM user_tables
   ),
   sizes AS (
-    SELECT COALESCE(INT8(SUM(cartodb._CDB_total_relation_size(schema_name, table_name)))) table_size,
+    SELECT COALESCE(INT8(SUM(@extschema@._CDB_total_relation_size(%L, table_name)))) table_size,
       CASE
         WHEN is_overview THEN 0
 	WHEN is_raster THEN 1
 	ELSE 0.5 -- Division by 2 is for not counting the_geom_webmercator
       END AS multiplier FROM table_cat GROUP BY is_overview, is_raster
   )
-  SELECT sum(table_size*multiplier)::int8 INTO total_size FROM sizes;
+  SELECT sum(table_size*multiplier)::int8 FROM sizes
+  ', raster_read_query, schema_name, schema_name) INTO total_size;
 
   IF total_size IS NOT NULL THEN
     RETURN total_size;
@@ -60,20 +72,20 @@ BEGIN
   END IF;
 END;
 $$
-LANGUAGE 'plpgsql' VOLATILE;
+LANGUAGE 'plpgsql' VOLATILE PARALLEL UNSAFE;
 
 
 -- Return the estimated size of user data. Used for quota checking.
 -- Implicit schema version for backwards compatibility
-CREATE OR REPLACE FUNCTION CDB_UserDataSize()
+CREATE OR REPLACE FUNCTION @extschema@.CDB_UserDataSize()
 RETURNS bigint AS
 $$
-  SELECT public.CDB_UserDataSize('public');
+  SELECT @extschema@.CDB_UserDataSize('public');
 $$
-LANGUAGE 'sql' VOLATILE;
+LANGUAGE 'sql' VOLATILE PARALLEL UNSAFE;
 
 -- Triggers cannot have declared arguments: pbfact float8, qmax int8, schema_name text
-CREATE OR REPLACE FUNCTION CDB_CheckQuota()
+CREATE OR REPLACE FUNCTION @extschema@.CDB_CheckQuota()
 RETURNS trigger AS
 $$
 DECLARE
@@ -85,7 +97,7 @@ DECLARE
 BEGIN
   IF TG_NARGS = 3 THEN
     schema_name := TG_ARGV[2];
-    IF cartodb.schema_exists(schema_name) = false THEN
+    IF @extschema@.schema_exists(schema_name) = false THEN
       RAISE EXCEPTION 'Invalid schema name "%"', schema_name;
     END IF;
   ELSE
@@ -116,7 +128,7 @@ BEGIN
       RETURN NEW;
     END IF;
 
-    SELECT public.CDB_UserDataSize(schema_name) INTO quota;
+    SELECT @extschema@.CDB_UserDataSize(schema_name) INTO quota;
     IF quota > qmax THEN
       RAISE EXCEPTION 'Quota exceeded by %KB', (quota-qmax)/1024;
     ELSE RAISE DEBUG 'User quota in bytes: % < % (max allowed)', quota, qmax;
@@ -126,16 +138,16 @@ BEGIN
   RETURN NEW;
 END;
 $$
-LANGUAGE 'plpgsql' VOLATILE;
+LANGUAGE 'plpgsql' VOLATILE PARALLEL UNSAFE;
 
 
-CREATE OR REPLACE FUNCTION CDB_SetUserQuotaInBytes(schema_name text, bytes int8)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_SetUserQuotaInBytes(schema_name text, bytes int8)
 RETURNS int8 AS
 $$
 DECLARE
   sql text;
 BEGIN
-  IF cartodb.schema_exists(schema_name::text) = false THEN
+  IF @extschema@.schema_exists(schema_name::text) = false THEN
     RAISE EXCEPTION 'Invalid schema name "%"', schema_name::text;
   END IF;
 
@@ -147,14 +159,14 @@ BEGIN
   return bytes;
 END
 $$
-LANGUAGE 'plpgsql' VOLATILE STRICT;
+LANGUAGE 'plpgsql' VOLATILE STRICT PARALLEL UNSAFE;
 
 
-CREATE OR REPLACE FUNCTION CDB_SetUserQuotaInBytes(bytes int8)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_SetUserQuotaInBytes(bytes int8)
 RETURNS int8 AS
 $$
 BEGIN
-  return public.CDB_SetUserQuotaInBytes('public', bytes);
+  return @extschema@.CDB_SetUserQuotaInBytes('public', bytes);
 END;
 $$
-LANGUAGE 'plpgsql' VOLATILE STRICT;
+LANGUAGE 'plpgsql' VOLATILE STRICT PARALLEL UNSAFE;

scripts-available/CDB_RandomTids.sql

@@ -15,7 +15,7 @@
 --
 --
 -- }{
-CREATE OR REPLACE FUNCTION CDB_RandomTids(in_table regclass, in_nsamples integer)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_RandomTids(in_table regclass, in_nsamples integer)
   RETURNS tid[]
 AS $$
 DECLARE
@@ -64,6 +64,6 @@ BEGIN
   RETURN tidlist;
 
 END
-$$ LANGUAGE 'plpgsql' STABLE STRICT;
+$$ LANGUAGE 'plpgsql' STABLE STRICT PARALLEL SAFE;
 -- }
 

scripts-available/CDB_RectangleGrid.sql

@@ -1,3 +1,6 @@
+-- In older versions of the extension, CDB_RectangleGrid had a different signature
+DROP FUNCTION IF EXISTS @extschema@.CDB_RectangleGrid(GEOMETRY, FLOAT8, FLOAT8, GEOMETRY);
+
 --
 -- Fill given extent with a rectangular coverage
 --
@@ -6,7 +9,7 @@
 --            be emitted. The returned hexagons will have the same SRID
 --            as this extent.
 --
--- @param width With of each rectangle
+-- @param width Width of each rectangle
 --
 -- @param height Height of each rectangle
 --
@@ -14,9 +17,12 @@
 --               If omitted the origin will be 0,0.
 --               The parameter is checked for having the same SRID
 --               as the extent.
---  
 --
-CREATE OR REPLACE FUNCTION CDB_RectangleGrid(ext GEOMETRY, width FLOAT8, height FLOAT8, origin GEOMETRY DEFAULT NULL)
+-- @param maxcells Optional maximum number of grid cells to generate;
+--                 if the grid requires more cells to cover the extent
+--                 and exception will occur.
+--
+CREATE OR REPLACE FUNCTION @extschema@.CDB_RectangleGrid(ext GEOMETRY, width FLOAT8, height FLOAT8, origin GEOMETRY DEFAULT NULL, maxcells INTEGER DEFAULT 512*512)
 RETURNS SETOF GEOMETRY
 AS $$
 DECLARE
@@ -38,17 +44,17 @@ DECLARE
   srid INTEGER;
 BEGIN
 
-  srid := ST_SRID(ext);
+  srid := @postgisschema@.ST_SRID(ext);
 
   xoff := 0; 
   yoff := 0;
 
   IF origin IS NOT NULL THEN
-    IF ST_SRID(origin) != srid THEN
+    IF @postgisschema@.ST_SRID(origin) != srid THEN
       RAISE EXCEPTION 'SRID mismatch between extent (%) and origin (%)', srid, ST_SRID(origin);
     END IF;
-    xoff := ST_X(origin);
-    yoff := ST_Y(origin);
+    xoff := @postgisschema@.ST_X(origin);
+    yoff := @postgisschema@.ST_Y(origin);
   END IF;
 
   --RAISE DEBUG 'X offset: %', xoff;
@@ -66,11 +72,11 @@ BEGIN
   vstep := height;
 
   -- Tweak horizontal start on hstep grid from origin 
-  hstart := xoff + ceil((ST_XMin(ext)-xoff)/hstep)*hstep; 
+  hstart := xoff + ceil((@postgisschema@.ST_XMin(ext)-xoff)/hstep)*hstep; 
   --RAISE DEBUG 'hstart: %', hstart;
 
   -- Tweak vertical start on vstep grid from origin 
-  vstart := yoff + ceil((ST_Ymin(ext)-yoff)/vstep)*vstep; 
+  vstart := yoff + ceil((@postgisschema@.ST_Ymin(ext)-yoff)/vstep)*vstep; 
   --RAISE DEBUG 'vstart: %', vstart;
 
   hend := ST_XMax(ext);
@@ -79,13 +85,19 @@ BEGIN
   --RAISE DEBUG 'hend: %', hend;
   --RAISE DEBUG 'vend: %', vend;
 
+  If maxcells IS NOT NULL AND maxcells > 0 THEN
+    IF ((hend - hstart)/hstep * (vend - vstart)/vstep)::integer > maxcells THEN
+        RAISE EXCEPTION 'The requested grid is too big to be rendered';
+    END IF;
+  END IF;
+
   x := hstart;
   WHILE x < hend LOOP -- over X
     y := vstart;
-    h := ST_MakeEnvelope(x-hw, y-hh, x+hw, y+hh, srid);
+    h := @postgisschema@.ST_MakeEnvelope(x-hw, y-hh, x+hw, y+hh, srid);
     WHILE y < vend LOOP -- over Y
       RETURN NEXT h;
-      h := ST_Translate(h, 0, vstep);
+      h := @postgisschema@.ST_Translate(h, 0, vstep);
       y := yoff + round(((y + vstep)-yoff)/ygrd)*ygrd; -- round to grid
     END LOOP;
     x := xoff + round(((x + hstep)-xoff)/xgrd)*xgrd; -- round to grid
@@ -93,4 +105,4 @@ BEGIN
 
   RETURN;
 END
-$$ LANGUAGE 'plpgsql' IMMUTABLE;
+$$ LANGUAGE 'plpgsql' IMMUTABLE PARALLEL SAFE;

scripts-available/CDB_SearchPath.sql

@@ -1,4 +1,4 @@
----- Make sure 'cartodb' is in database search path
+---- Make sure '@extschema@' is in database search path
 DO
 $$
 DECLARE
@@ -8,13 +8,13 @@ BEGIN
   SELECT reset_val INTO var_cur_search_path
   FROM pg_settings WHERE name = 'search_path';
 
-  IF var_cur_search_path LIKE '%cartodb%' THEN
-    RAISE DEBUG '"cartodb" already in database search_path';
+  IF var_cur_search_path LIKE '%@extschema@%' THEN
+    RAISE DEBUG '"@extschema@" already in database search_path';
   ELSE
-    var_cur_search_path := var_cur_search_path || ', "cartodb"';
+    var_cur_search_path := var_cur_search_path || ', "@extschema@"';
     EXECUTE 'ALTER DATABASE ' || quote_ident(current_database()) ||
             ' SET search_path = ' || var_cur_search_path;
-    RAISE DEBUG '"cartodb" has been added to end of database search_path';
+    RAISE DEBUG '"@extschema@" has been added to end of database search_path';
   END IF;
 
   -- Reset search_path

scripts-available/CDB_Stats.sql

@@ -4,44 +4,50 @@
 -- @param in_array A numeric array of numbers
 --
 -- Returns: statistical quantity chosen
--- 
+--
 -- References: http://www.itl.nist.gov/div898/handbook/eda/section3/eda35b.htm
 --
 
 -- Calculate kurtosis
-CREATE OR REPLACE FUNCTION CDB_Kurtosis ( in_array NUMERIC[] ) RETURNS NUMERIC as $$
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Kurtosis ( in_array NUMERIC[] ) RETURNS NUMERIC as $$
 DECLARE
     a numeric;
     c numeric;
-    s numeric;
     k numeric;
 BEGIN
-    SELECT AVG(e), COUNT(e)::numeric, stddev(e) INTO a, c, s FROM ( SELECT unnest(in_array) e ) x;
+    SELECT AVG(e), COUNT(e)::numeric * power(stddev(e),4) INTO a, c FROM ( SELECT unnest(in_array) e ) x;
 
-    EXECUTE 'SELECT sum(power($1 - e, 4)) / ( $2 * power($3, 4)) - 3
-             FROM (SELECT unnest($4) e ) x'
-    INTO k
-    USING a, c, s, in_array;
+    IF c=0 THEN
+      RETURN 0;
+    ELSE
 
-    RETURN k;
+      EXECUTE 'SELECT sum(power($1 - e, 4)) / ($2 ) - 3
+             FROM (SELECT unnest($3) e ) x'
+      INTO k
+      USING a, c, in_array;
+
+      RETURN k;
+    END IF;
 END;
-$$ language plpgsql IMMUTABLE;
+$$ language plpgsql IMMUTABLE STRICT PARALLEL SAFE;
 
 -- Calculate skewness
-CREATE OR REPLACE FUNCTION CDB_Skewness ( in_array NUMERIC[] ) RETURNS NUMERIC as $$
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Skewness ( in_array NUMERIC[] ) RETURNS NUMERIC as $$
 DECLARE
     a numeric;
     c numeric;
-    s numeric;
     sk numeric;
 BEGIN
-    SELECT AVG(e), COUNT(e)::numeric, stddev(e) INTO a, c, s FROM ( SELECT unnest(in_array) e ) x;
+    SELECT AVG(e), COUNT(e)::numeric * power(stddev(e),3) INTO a, c FROM ( SELECT unnest(in_array) e ) x;
+    IF c=0 THEN
+      RETURN 0;
+    ELSE
+      EXECUTE 'SELECT sum(power($1 - e, 3)) / ( $2 )
+             FROM (SELECT unnest($3) e ) x'
+      INTO sk
+      USING a, c, in_array;
 
-    EXECUTE 'SELECT sum(power($1 - e, 3)) / ( $2 * power($3, 3))
-             FROM (SELECT unnest($4) e ) x'
-    INTO sk
-    USING a, c, s, in_array;
-
-    RETURN sk;
+      RETURN sk;
+    END IF;
 END;
-$$ language plpgsql IMMUTABLE;
+$$ language plpgsql IMMUTABLE STRICT PARALLEL SAFE;

scripts-available/CDB_StringToDate.sql

@@ -1,7 +1,7 @@
 -- Convert string to date
 --
-DROP FUNCTION IF EXISTS CDB_StringToDate(character varying);
-CREATE OR REPLACE FUNCTION CDB_StringToDate(input character varying)
+DROP FUNCTION IF EXISTS @extschema@.CDB_StringToDate(character varying);
+CREATE OR REPLACE FUNCTION @extschema@.CDB_StringToDate(input character varying)
 RETURNS TIMESTAMP AS $$
 DECLARE output TIMESTAMP;
 BEGIN
@@ -17,4 +17,4 @@ BEGIN
 RETURN output;
 END;
 $$
-LANGUAGE 'plpgsql' STABLE STRICT;
+LANGUAGE 'plpgsql' IMMUTABLE STRICT PARALLEL UNSAFE;

scripts-available/CDB_SyncTable.sql

@@ -0,0 +1,167 @@
+/*
+   Gets the column names of a given table.
+
+   Sample usage:
+
+     SELECT @extschema@._CDB_GetColumns('public.films');
+*/
+CREATE OR REPLACE FUNCTION @extschema@._CDB_GetColumns(src_table REGCLASS)
+RETURNS SETOF NAME
+AS $$
+  SELECT
+    a.attname as "colname"
+  FROM
+    pg_catalog.pg_attribute a
+  WHERE
+    a.attnum > 0
+      AND NOT a.attisdropped
+      AND a.attrelid = (
+        SELECT c.oid
+          FROM pg_catalog.pg_class c
+          LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
+          WHERE c.oid = src_table::oid
+            AND pg_catalog.pg_table_is_visible(c.oid)
+      )
+  ORDER BY a.attnum;
+$$ LANGUAGE sql STABLE PARALLEL UNSAFE;
+
+
+/*
+    Given an array of quoted column names, it generates an UPDATE SET
+    clause with the following form:
+
+        the_geom = changed.the_geom,
+        id = changed.id,
+        elevation = changed.elevation
+
+    Example of usage:
+
+       SELECT @extschema@.__CDB_GetUpdateSetClause('{the_geom, id, elevation}', 'changed');
+*/
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_GetUpdateSetClause(colnames TEXT[], update_source TEXT)
+RETURNS TEXT
+AS $$
+DECLARE
+  set_clause_list TEXT[];
+  col TEXT;
+BEGIN
+  FOREACH col IN ARRAY colnames
+  LOOP
+    set_clause_list := array_append(set_clause_list, format('%1$s = %2$s.%1$s', col, update_source));
+  END lOOP;
+  RETURN array_to_string(set_clause_list, ', ');
+END;
+$$ LANGUAGE plpgsql IMMUTABLE PARALLEL SAFE;
+
+
+/*
+    Given a prefix, generate a safe unique NAME for a temp table.
+
+    Example of usage:
+
+       SELECT @extschema@.__CDB_GenerateUniqueName('src_sync'); --> src_sync_718794_120106
+
+*/
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_GenerateUniqueName(prefix TEXT)
+RETURNS NAME
+AS $$
+  SELECT format('%s_%s_%s', prefix, txid_current(), (random()*1000000)::int)::NAME;
+$$ LANGUAGE sql VOLATILE PARALLEL UNSAFE;
+
+/*
+    Given a table name and an array of column names,
+    return array of column names qualified with the table name and quoted when necessary
+    tablename and colnames should be properly quoted, and for this reason the type NAME is not
+    used for them (with quotes they could exceed the maximum identifier length)
+
+    Example of usage:
+
+       SELECT @extschema@.__CDB_QualifyColumns('t', ARRAY['a','"b-1"']); --> ARRAY['t.a','t."b-1"']
+
+*/
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_QualifyColumns(tablename NAME, colnames NAME[]) RETURNS TEXT[] AS
+$$
+    SELECT array_agg(tablename || '.' || _colname) from unnest(colnames) _colname;
+$$ LANGUAGE sql IMMUTABLE PARALLEL SAFE;
+
+/*
+   A Table Syncer
+
+   Assumptions:
+     - Both tables contain a consistent cartodb_id column
+     - Destination table has all columns of the source or does not exist
+
+   Sample usage:
+
+     SELECT CDB_SyncTable('radar_stations', 'public', 'syncdest');
+     SELECT CDB_SyncTable('test_sync_source', 'public', 'test_sync_dest', '{the_geom, the_geom_webmercator}');
+
+*/
+CREATE OR REPLACE FUNCTION @extschema@.CDB_SyncTable(src_table REGCLASS, dst_schema REGNAMESPACE, dst_table NAME, skip_cols NAME[] = '{}')
+RETURNS void
+AS $$
+DECLARE
+  fq_dest_table TEXT;
+
+  colnames TEXT[];
+  dst_colnames TEXT;
+  src_colnames TEXT;
+
+  update_set_clause TEXT;
+
+  num_rows BIGINT;
+  err_context text;
+
+  t timestamptz;
+BEGIN
+  -- If the destination table does not exist, just copy the source table
+  fq_dest_table := format('%s.%I', dst_schema, dst_table);
+  EXECUTE format('CREATE TABLE IF NOT EXISTS %s as TABLE %s', fq_dest_table, src_table);
+  GET DIAGNOSTICS num_rows = ROW_COUNT;
+  IF num_rows > 0 THEN
+    RAISE NOTICE 'INSERTED % row(s)', num_rows;
+    RETURN;
+  END IF;
+
+  skip_cols := skip_cols || '{cartodb_id}';
+
+  -- Get the list of columns from the source table, excluding skip_cols
+  SELECT ARRAY(SELECT quote_ident(c) FROM @extschema@._CDB_GetColumns(src_table) as c EXCEPT SELECT unnest(skip_cols)) INTO colnames;
+
+  -- Deal with deleted rows: ids in dest but not in source
+  t := clock_timestamp();
+  EXECUTE format(
+    'DELETE FROM %1$s _dst WHERE NOT EXISTS (SELECT * FROM %2$s _src WHERE _src.cartodb_id=_dst.cartodb_id)',
+    fq_dest_table, src_table);
+  GET DIAGNOSTICS num_rows = ROW_COUNT;
+  RAISE NOTICE 'DELETED % row(s)', num_rows;
+  RAISE DEBUG 'DELETE time (s): %', clock_timestamp() - t;
+
+  -- Deal with inserted rows: ids in source but not in dest
+  t := clock_timestamp();
+  EXECUTE format('
+      INSERT INTO %1$s(cartodb_id, %2$s)
+      SELECT cartodb_id, %2$s FROM %3$s _src WHERE NOT EXISTS (SELECT * FROM %1$s _dst WHERE _src.cartodb_id=_dst.cartodb_id)
+  ', fq_dest_table, array_to_string(colnames, ','), src_table);
+  GET DIAGNOSTICS num_rows = ROW_COUNT;
+  RAISE NOTICE 'INSERTED % row(s)', num_rows;
+  RAISE DEBUG 'INSERT time (s): %', clock_timestamp() - t;
+
+  -- Deal with modified rows: ids in source and dest but different hashes
+  t := clock_timestamp();
+  update_set_clause :=  @extschema@.__CDB_GetUpdateSetClause(colnames, '_changed');
+  dst_colnames := array_to_string(@extschema@.__CDB_QualifyColumns('_dst', colnames), ',');
+  src_colnames := array_to_string(@extschema@.__CDB_QualifyColumns('_src', colnames), ',');
+  EXECUTE format('
+      UPDATE %1$s _update SET %2$s
+      FROM (
+        SELECT _src.* FROM %3$s _src JOIN %1$s _dst ON (_dst.cartodb_id = _src.cartodb_id)
+        WHERE  md5(ROW(%4$s)::text) <> md5(ROW(%5$s)::text)
+      ) _changed
+      WHERE _update.cartodb_id = _changed.cartodb_id;
+  ', fq_dest_table, update_set_clause, src_table, dst_colnames, src_colnames);
+  GET DIAGNOSTICS num_rows = ROW_COUNT;
+  RAISE NOTICE 'MODIFIED % row(s)', num_rows;
+  RAISE DEBUG 'UPDATE time (s): %', clock_timestamp() - t;
+END;
+$$ LANGUAGE plpgsql VOLATILE PARALLEL UNSAFE;

scripts-available/CDB_TableIndexes.sql

@@ -1,5 +1,5 @@
 -- Function returning indexes for a table
-CREATE OR REPLACE FUNCTION CDB_TableIndexes(REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_TableIndexes(REGCLASS)
 RETURNS TABLE(index_name name, index_unique bool, index_primary bool, index_keys text array)
 AS $$
 
@@ -20,8 +20,8 @@ AS $$
   AND pg_class.relname=pg_indexes.indexname
   ;
 
-$$ LANGUAGE SQL;
+$$ LANGUAGE SQL STABLE PARALLEL SAFE;
 
 -- This is to migrate from pre-0.2.0 version
 -- See http://github.com/CartoDB/cartodb-postgresql/issues/36
-GRANT EXECUTE ON FUNCTION CDB_TableIndexes(REGCLASS) TO public;
+GRANT EXECUTE ON FUNCTION @extschema@.CDB_TableIndexes(REGCLASS) TO public;

scripts-available/CDB_TableMetadata.sql

@@ -1,18 +1,18 @@
 
 CREATE TABLE IF NOT EXISTS
-  public.CDB_TableMetadata (
+  @extschema@.CDB_TableMetadata (
     tabname regclass not null primary key,
     updated_at timestamp with time zone not null default now()
   );
 
-CREATE OR REPLACE VIEW public.CDB_TableMetadata_Text AS
+CREATE OR REPLACE VIEW @extschema@.CDB_TableMetadata_Text AS
        SELECT FORMAT('%I.%I', n.nspname::text, c.relname::text) tabname, updated_at
-       FROM public.CDB_TableMetadata, pg_catalog.pg_class c
+       FROM @extschema@.CDB_TableMetadata m JOIN pg_catalog.pg_class c ON m.tabname::oid = c.oid
        LEFT JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid;
 
 -- No one can see this
 -- Updates are only possible trough the security definer trigger
--- GRANT SELECT ON public.CDB_TableMetadata TO public;
+-- GRANT SELECT ON @extschema@.CDB_TableMetadata TO public;
 
 --
 -- Trigger logging updated_at in the CDB_TableMetadata
@@ -27,42 +27,45 @@ CREATE OR REPLACE VIEW public.CDB_TableMetadata_Text AS
 --
 -- NOTE: _never_ attach to CDB_TableMetadata ...
 --
-CREATE OR REPLACE FUNCTION CDB_TableMetadata_Trigger()
+CREATE OR REPLACE FUNCTION @extschema@.CDB_TableMetadata_Trigger()
 RETURNS trigger AS
 $$
 BEGIN
   -- Guard against infinite loop
-  IF TG_RELID = 'public.CDB_TableMetadata'::regclass::oid THEN
+  IF TG_RELID = '@extschema@.CDB_TableMetadata'::regclass::oid THEN
     RETURN NULL;
   END IF;
 
   -- Cleanup stale entries
-  DELETE FROM public.CDB_TableMetadata
+  DELETE FROM @extschema@.CDB_TableMetadata
    WHERE NOT EXISTS (
     SELECT oid FROM pg_class WHERE oid = tabname
   );
 
   WITH nv as (
-    SELECT TG_RELID as tabname, NOW() as t
+    SELECT TG_RELID as tabname, now() as t
   ), updated as (
-    UPDATE public.CDB_TableMetadata x SET updated_at = nv.t
+    UPDATE @extschema@.CDB_TableMetadata x SET updated_at = nv.t
     FROM nv WHERE x.tabname = nv.tabname
     RETURNING x.tabname
   )
-  INSERT INTO public.CDB_TableMetadata SELECT nv.*
+  INSERT INTO @extschema@.CDB_TableMetadata SELECT nv.*
   FROM nv LEFT JOIN updated USING(tabname)
   WHERE updated.tabname IS NULL;
 
   RETURN NULL;
 END;
-$$
-LANGUAGE plpgsql VOLATILE SECURITY DEFINER;
+$$  LANGUAGE plpgsql
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
 
 --
 -- Trigger invalidating varnish whenever CDB_TableMetadata
 -- record change.
 --
-CREATE OR REPLACE FUNCTION _CDB_TableMetadata_Updated()
+CREATE OR REPLACE FUNCTION @extschema@._CDB_TableMetadata_Updated()
 RETURNS trigger AS
 $$
 DECLARE
@@ -93,14 +96,14 @@ BEGIN
   --
 
   -- Call the first varnish invalidation function owned
-  -- by a superuser found in cartodb or public schema
+  -- by a superuser found in @extschema@ or public schema
   -- (in that order)
   found := false;
   FOR rec IN SELECT u.usesuper, u.usename, n.nspname, p.proname
              FROM pg_proc p, pg_namespace n, pg_user u
              WHERE p.proname = 'cdb_invalidate_varnish'
                AND p.pronamespace = n.oid
-               AND n.nspname IN ('public', 'cartodb')
+               AND n.nspname IN ('public', '@extschema@')
                AND u.usesysid = p.proowner
                AND u.usesuper
              ORDER BY n.nspname
@@ -116,31 +119,34 @@ BEGIN
 
   RETURN NULL;
 END;
-$$
-LANGUAGE plpgsql VOLATILE SECURITY DEFINER;
+$$  LANGUAGE plpgsql
+    VOLATILE
+    PARALLEL UNSAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;
 
-DROP TRIGGER IF EXISTS table_modified ON public.CDB_TableMetadata;
+DROP TRIGGER IF EXISTS table_modified ON @extschema@.CDB_TableMetadata;
 -- NOTE: on DELETE we would be unable to convert the table
 --       oid (regclass) to its name
 CREATE TRIGGER table_modified AFTER INSERT OR UPDATE
-ON public.CDB_TableMetadata FOR EACH ROW EXECUTE PROCEDURE
- _CDB_TableMetadata_Updated();
+ON @extschema@.CDB_TableMetadata FOR EACH ROW EXECUTE PROCEDURE
+    @extschema@._CDB_TableMetadata_Updated();
 
 
 -- similar to TOUCH(1) in unix filesystems but for table in cdb_tablemetadata
-CREATE OR REPLACE FUNCTION public.CDB_TableMetadataTouch(tablename regclass)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_TableMetadataTouch(tablename regclass)
     RETURNS void AS
     $$
     BEGIN
         WITH upsert AS (
-            UPDATE public.cdb_tablemetadata
+            UPDATE @extschema@.cdb_tablemetadata
             SET updated_at = NOW()
             WHERE tabname = tablename
             RETURNING *
         )
-        INSERT INTO public.cdb_tablemetadata (tabname, updated_at)
+        INSERT INTO @extschema@.cdb_tablemetadata (tabname, updated_at)
             SELECT tablename, NOW()
             WHERE NOT EXISTS (SELECT * FROM upsert);
     END;
     $$
-LANGUAGE 'plpgsql' VOLATILE STRICT;
+LANGUAGE 'plpgsql' VOLATILE STRICT PARALLEL UNSAFE;

scripts-available/CDB_TransformToWebmercator.sql

@@ -5,19 +5,19 @@
 -- for web mercator by "clipping" anything outside to the valid
 -- range.
 --
-CREATE OR REPLACE FUNCTION CDB_TransformToWebmercator(geom geometry)
-RETURNS geometry
+CREATE OR REPLACE FUNCTION @extschema@.CDB_TransformToWebmercator(geom @postgisschema@.geometry)
+RETURNS @postgisschema@.geometry
 AS
 $$
 DECLARE
-  valid_extent GEOMETRY;
-  latlon_input GEOMETRY;
-  clipped_input GEOMETRY;
-  to_webmercator GEOMETRY;
-  ret GEOMETRY;
+  valid_extent @postgisschema@.GEOMETRY;
+  latlon_input @postgisschema@.GEOMETRY;
+  clipped_input @postgisschema@.GEOMETRY;
+  to_webmercator @postgisschema@.GEOMETRY;
+  ret @postgisschema@.GEOMETRY;
 BEGIN
 
-  IF ST_Srid(geom) = 3857 THEN
+  IF @postgisschema@.ST_Srid(geom) = 3857 THEN
     RETURN geom;
   END IF;
 
@@ -27,52 +27,56 @@ BEGIN
   --       to -85.0511 to 85.0511 but as long as proj
   --       does not complain we are happy
   --
-  valid_extent := ST_MakeEnvelope(-180, -89, 180, 89, 4326);
+  valid_extent := @postgisschema@.ST_MakeEnvelope(-180, -89, 180, 89, 4326);
 
   -- Then we transform to WGS84 latlon, which is
   -- where we have known coordinates for the clipping
-  -- 
-  latlon_input := ST_Transform(geom, 4326);
+  --
+  latlon_input := @postgisschema@.ST_Transform(geom, 4326);
 
   -- Don't bother clipping if the geometry boundary doesn't
   -- go outside the valid extent.
   IF latlon_input @ valid_extent THEN
-    RETURN ST_Transform(latlon_input, 3857);
+    BEGIN
+      RETURN @postgisschema@.ST_Transform(latlon_input, 3857);
+    EXCEPTION WHEN OTHERS THEN
+      RETURN NULL;
+    END;
   END IF;
 
   -- Since we're going to use ST_Intersection on input
   -- we'd better ensure the input is valid
   -- TODO: only do this if the first ST_Intersection fails ?
-  IF ST_Dimension(geom) != 0 AND 
+  IF @postgisschema@.ST_Dimension(geom) != 0 AND 
       -- See http://trac.osgeo.org/postgis/ticket/1719
-     GeometryType(geom) != 'GEOMETRYCOLLECTION'
+     @postgisschema@.GeometryType(geom) != 'GEOMETRYCOLLECTION'
   THEN
     BEGIN
-      latlon_input := ST_MakeValid(latlon_input);
+      latlon_input := @postgisschema@.ST_MakeValid(latlon_input);
     EXCEPTION
       WHEN OTHERS THEN
         -- See http://github.com/Vizzuality/cartodb/issues/931
         RAISE WARNING 'Could not clean input geometry: %', SQLERRM;
-        RETURN NULL; 
+        RETURN NULL;
     END;
-    latlon_input := ST_CollectionExtract(latlon_input, ST_Dimension(geom)+1);
+    latlon_input := @postgisschema@.ST_CollectionExtract(latlon_input, ST_Dimension(geom)+1);
   END IF;
 
   -- Then we clip, trying to retain the input type
   -- TODO: catch exceptions here too ?
-  clipped_input := ST_Intersection(latlon_input, valid_extent);
+  clipped_input := @postgisschema@.ST_Intersection(latlon_input, valid_extent);
 
   -- We transform to web mercator
-  to_webmercator := ST_Transform(clipped_input, 3857);
+  to_webmercator := @postgisschema@.ST_Transform(clipped_input, 3857);
 
-  -- Finally we convert EMPTY to NULL 
+  -- Finally we convert EMPTY to NULL
   -- See https://github.com/Vizzuality/cartodb/issues/706
   -- And retain "multi" status
-  ret := CASE WHEN ST_IsEmpty(to_webmercator) THEN NULL::geometry
-      WHEN GeometryType(geom) LIKE 'MULTI%' THEN ST_Multi(to_webmercator)
+  ret := CASE WHEN @postgisschema@.ST_IsEmpty(to_webmercator) THEN NULL::@postgisschema@.geometry
+      WHEN @postgisschema@.GeometryType(geom) LIKE 'MULTI%' THEN @postgisschema@.ST_Multi(to_webmercator)
       ELSE to_webmercator
   END;
 
   RETURN ret;
 END
-$$ LANGUAGE 'plpgsql' IMMUTABLE STRICT;
+$$ LANGUAGE 'plpgsql' IMMUTABLE STRICT PARALLEL UNSAFE;

scripts-available/CDB_UserTables.sql

@@ -5,8 +5,8 @@
 --
 -- Currently accepted permissions are: 'public', 'private' or 'all'
 --
-DROP FUNCTION IF EXISTS CDB_UserTables(text);
-CREATE OR REPLACE FUNCTION CDB_UserTables(perm text DEFAULT 'all')
+DROP FUNCTION IF EXISTS @extschema@.CDB_UserTables(text);
+CREATE OR REPLACE FUNCTION @extschema@.CDB_UserTables(perm text DEFAULT 'all')
 RETURNS SETOF name
 AS $$
 
@@ -14,15 +14,15 @@ SELECT c.relname
 FROM pg_class c 
 JOIN pg_namespace n ON n.oid = c.relnamespace
 WHERE c.relkind = 'r' 
-AND c.relname NOT IN ('cdb_tablemetadata', 'spatial_ref_sys')
-AND n.nspname NOT IN ('pg_catalog', 'information_schema', 'topology', 'cartodb')
+AND c.relname NOT IN ('cdb_tablemetadata', 'cdb_analysis_catalog', 'cdb_conf', 'spatial_ref_sys')
+AND n.nspname NOT IN ('pg_catalog', 'information_schema', 'topology', '@extschema@')
 AND CASE WHEN perm = 'public' THEN has_table_privilege('publicuser', c.oid, 'SELECT')
          WHEN perm = 'private' THEN has_table_privilege(current_user, c.oid, 'SELECT') AND NOT has_table_privilege('publicuser', c.oid, 'SELECT')
          WHEN perm = 'all' THEN has_table_privilege(current_user, c.oid, 'SELECT') OR has_table_privilege('publicuser', c.oid, 'SELECT')
          ELSE false END;
 
-$$ LANGUAGE 'sql';
+$$ LANGUAGE 'sql' STABLE PARALLEL SAFE;
 
 -- This is to migrate from pre-0.2.0 version
 -- See http://github.com/CartoDB/cartodb-postgresql/issues/36
-GRANT EXECUTE ON FUNCTION CDB_UserTables(text) TO public;
+GRANT EXECUTE ON FUNCTION @extschema@.CDB_UserTables(text) TO public;

scripts-available/CDB_Username.sql

@@ -0,0 +1,10 @@
+-- Returns the cartodb username of the current PostgreSQL session
+CREATE OR REPLACE FUNCTION @extschema@.CDB_Username()
+RETURNS text
+AS $$
+  SELECT @extschema@.CDB_Conf_GetConf(concat('api_keys_', session_user))->>'username';
+$$  LANGUAGE SQL
+    STABLE
+    PARALLEL SAFE
+    SECURITY DEFINER
+    SET search_path = pg_temp;

scripts-available/CDB_XYZ.sql

@@ -1,13 +1,12 @@
-
 -- {
 -- Return pixel resolution at the given zoom level
 -- }{
-CREATE OR REPLACE FUNCTION CDB_XYZ_Resolution(z INTEGER)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_XYZ_Resolution(z INTEGER)
 RETURNS FLOAT8
 AS $$
   -- circumference divided by 256 is z0 resolution, then divide by 2^z
   SELECT 6378137.0*2.0*pi() / 256.0 / power(2.0, z);
-$$ LANGUAGE SQL IMMUTABLE STRICT;
+$$ LANGUAGE SQL IMMUTABLE PARALLEL SAFE STRICT;
 -- }
 
 -- {
@@ -16,7 +15,7 @@ $$ LANGUAGE SQL IMMUTABLE STRICT;
 -- SRID of the returned polygon is forceably 3857
 --
 -- }{
-CREATE OR REPLACE FUNCTION CDB_XYZ_Extent(x INTEGER, y INTEGER, z INTEGER)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_XYZ_Extent(x INTEGER, y INTEGER, z INTEGER)
 RETURNS GEOMETRY
 AS $$
 DECLARE
@@ -35,7 +34,7 @@ BEGIN
   -- Size of each tile in pixels (1:1 aspect ratio)
   tile_size := 256;
 
-  initial_resolution := CDB_XYZ_Resolution(0);
+  initial_resolution := @extschema@.CDB_XYZ_Resolution(0);
   --RAISE DEBUG 'Initial resolution: %', initial_resolution;
 
   origin_shift := (initial_resolution * tile_size) / 2.0;
@@ -57,8 +56,7 @@ BEGIN
   --RAISE DEBUG 'ymin: %', ymin;
   --RAISE DEBUG 'ymax: %', ymax;
   
-  RETURN ST_MakeEnvelope(xmin, ymin, xmax, ymax, 3857);
-
+  RETURN @postgisschema@.ST_MakeEnvelope(xmin, ymin, xmax, ymax, 3857);
 END
-$$ LANGUAGE 'plpgsql' IMMUTABLE STRICT;
+$$ LANGUAGE 'plpgsql' IMMUTABLE STRICT PARALLEL SAFE;
 -- }

scripts-available/CDB_ZoomFromScale.sql

@@ -1,8 +1,8 @@
 -- Maximum supported zoom level
-CREATE OR REPLACE FUNCTION _CDB_MaxSupportedZoom()
+CREATE OR REPLACE FUNCTION @extschema@._CDB_MaxSupportedZoom()
 RETURNS int
 LANGUAGE SQL
-IMMUTABLE
+IMMUTABLE PARALLEL SAFE
 AS $$
   -- The maximum zoom level has to be limited for various reasons,
   -- e.g. zoom levels greater than 31 would require tile coordinates
@@ -12,10 +12,10 @@ AS $$
   SELECT 29;
 $$;
 
-CREATE OR REPLACE FUNCTION cartodb.CDB_ZoomFromScale(scaleDenominator numeric)
+CREATE OR REPLACE FUNCTION @extschema@.CDB_ZoomFromScale(scaleDenominator numeric)
 RETURNS int
 LANGUAGE SQL
-IMMUTABLE
+IMMUTABLE PARALLEL SAFE
 AS $$
   SELECT
     CASE
@@ -24,12 +24,12 @@ AS $$
         NULL
       WHEN scaleDenominator = 0 THEN
         -- Actual zoom level would be infinite
-        _CDB_MaxSupportedZoom()
+        @extschema@._CDB_MaxSupportedZoom()
       ELSE
         CAST (
           LEAST(
             ROUND(LOG(2, 559082264.028/scaleDenominator)),
-            _CDB_MaxSupportedZoom()
+            @extschema@._CDB_MaxSupportedZoom()
           )
         AS INTEGER)
     END;

scripts-enabled/280-CDB_EstimateRowCount.sql

@@ -0,0 +1 @@
+../scripts-available/CDB_EstimateRowCount.sql

scripts-enabled/290-CDB_GhostTables.sql

@@ -0,0 +1 @@
+../scripts-available/CDB_GhostTables.sql

scripts-enabled/300-CDB_OAuth.sql

@@ -0,0 +1 @@
+../scripts-available/CDB_OAuth.sql

scripts-enabled/400-CDB_FederatedServer.sql

@@ -0,0 +1 @@
+../scripts-available/CDB_FederatedServer.sql

scripts-enabled/401_CDB_FederatedServerTables.sql

@@ -0,0 +1 @@
+../scripts-available/CDB_FederatedServerTables.sql

scripts-enabled/402_CDB_FederatedServerListRemote.sql

@@ -0,0 +1 @@
+../scripts-available/CDB_FederatedServerListRemote.sql

scripts-enabled/403-CDB_FederatedServerDiagnostics.sql

@@ -0,0 +1 @@
+../scripts-available/CDB_FederatedServerDiagnostics.sql

scripts-enabled/900-CDB_DDLTriggers.sql

@@ -0,0 +1 @@
+../scripts-available/CDB_DDLTriggers.sql

scripts-enabled/920-CDB_Username.sql

@@ -0,0 +1 @@
+../scripts-available/CDB_Username.sql

scripts-enabled/CDB_SyncTable.sql

@@ -0,0 +1 @@
+../scripts-available/CDB_SyncTable.sql

sql/test_setup.sql

@@ -1,9 +1,14 @@
+\set ECHO none
+\set QUIET on
+SET client_min_messages TO error;
 CREATE EXTENSION postgis;
-CREATE EXTENSION plpythonu;
-CREATE EXTENSION cartodb;
+CREATE EXTENSION @@plpythonu@@;
+CREATE SCHEMA cartodb;
+\i 'cartodb--unpackaged--@@VERSION@@.sql'
 CREATE FUNCTION public.cdb_invalidate_varnish(table_name text)
 RETURNS void AS $$
 BEGIN
   RAISE NOTICE 'cdb_invalidate_varnish(%) called', table_name;
 END;
 $$ LANGUAGE 'plpgsql';
+\set QUIET off

sql/test_setup_expect

@@ -0,0 +1 @@
+\set ECHO none

test/CDB_AnalysisCheckTest.sql

@@ -7,7 +7,7 @@ SELECT _CDB_AnalysisDataSize('public');
 CREATE TABLE analysis_2f13a3dbd7_41bd92976fc6dd97072afe4ee450054f4c0715d5(id int);
 CREATE TABLE analysis_2f13a3dbd7_f00cee44e9e6152b450bde3a92eb9ae0d099da94(id int);
 CREATE TABLE analysis_2f13a3dbd7_f00cee44e9e6152b450bde3a92eb9ae0d099da9(id int);
-SELECT _CDB_AnalysisTablesInSchema('public');
+SELECT _CDB_AnalysisTablesInSchema('public') t ORDER BY t;
 SELECT _CDB_AnalysisDataSize('public');
 SELECT CDB_CheckAnalysisQuota('analysis_2f13a3dbd7_f00cee44e9e6152b450bde3a92eb9ae0d099da94');
 SELECT CDB_SetUserQuotaInBytes(1);

test/CDB_CartodbfyTableTest.sql

@@ -134,9 +134,9 @@ DROP TABLE t;
 -- table with single non-geometrical column
 CREATE TABLE t AS SELECT ST_SetSRID(ST_MakePoint(-1,-1),4326) as the_geom, 1::int as cartodb_id, 'this is a sentence' as description;
 SELECT CDB_CartodbfyTableCheck('t', 'check function idempotence');
-SELECT * FROM t;
+SELECT cartodb_id, the_geom, description FROM t;
 SELECT CDB_CartodbfyTableCheck('t', 'check function idempotence');
-SELECT * FROM t;
+SELECT cartodb_id, the_geom, description FROM t;
 DROP TABLE t;
 
 -- table with existing srid-unconstrained (but type-constrained) the_geom
@@ -372,6 +372,24 @@ SELECT column_name FROM information_schema.columns WHERE table_name = 'test' AND
 DROP TABLE test;
 SET client_min_messages TO error;
 
+-- Unique identifier generation can break CDB_CartodbfyTable #305
+BEGIN;
+    DO $$
+    BEGIN
+       FOR i IN 1..150 LOOP
+            EXECUTE 'CREATE TABLE untitled_table();';
+            EXECUTE $query$SELECT CDB_CartodbfyTable('untitled_table');$query$;
+            EXECUTE 'ALTER TABLE untitled_table RENAME TO my_renamed_table_' || i;
+       END LOOP;
+    END;
+    $$;
+ROLLBACK;
+
+-- Long table name could cause possible sequence rename collision #325
+CREATE TABLE "wadus_table_9473e8f6-2da1-11e8-8bca-0204e4dfe4d8" ( cartodb_id serial primary key );
+SELECT CDB_CartodbfyTableCheck('wadus_table_9473e8f6-2da1-11e8-8bca-0204e4dfe4d8'::REGCLASS, 'Long table name could cause sequence collision while renaming #325');
+DROP TABLE "wadus_table_9473e8f6-2da1-11e8-8bca-0204e4dfe4d8";
+
 -- TODO: table with existing custom-triggered the_geom
 
 DROP FUNCTION CDB_CartodbfyTableCheck(regclass, text);

test/CDB_CartodbfyTableTest_expect

@@ -7,9 +7,9 @@ single non-geometrical column cartodbfied fine
 DROP TABLE
 SELECT 1
 check function idempotence cartodbfied fine
-1|0101000020E6100000000000000000F0BF000000000000F0BF|0101000020110F0000DB0B4ADA772DFBC077432E49D22DFBC0|this is a sentence
+1|0101000020E6100000000000000000F0BF000000000000F0BF|this is a sentence
 check function idempotence cartodbfied fine
-1|0101000020E6100000000000000000F0BF000000000000F0BF|0101000020110F0000DB0B4ADA772DFBC077432E49D22DFBC0|this is a sentence
+1|0101000020E6100000000000000000F0BF000000000000F0BF|this is a sentence
 DROP TABLE
 SELECT 1
 srid-unconstrained the_geom cartodbfied fine
@@ -147,5 +147,11 @@ NOTICE:  Trying to recover data from _cartodb_id0 column
 
 DROP TABLE
 SET
+BEGIN
+DO
+ROLLBACK
+CREATE TABLE
+Long table name could cause sequence collision while renaming #325 cartodbfied fine
+DROP TABLE
 DROP FUNCTION
 DROP FUNCTION

test/CDB_DigitSeparatorTest_expect

@@ -1,5 +1,6 @@
 BEGIN
 CREATE TABLE
+COPY 3
 none||
 only_com_dec|.|,
 only_dot_dec|,|.

test/CDB_EqualIntervalBinsTest.sql

@@ -2,4 +2,10 @@ WITH data AS (
     SELECT array_agg(x::numeric) s FROM generate_series(1,300) x 
         WHERE x % 5 != 0 AND x % 7 != 0
     ) 
-SELECT round(unnest(CDB_EqualIntervalBins(s, 7)),7) FROM data
+SELECT round(unnest(CDB_EqualIntervalBins(s, 7)),7) FROM data;
+
+WITH data_nulls AS (
+    SELECT array_agg(CASE WHEN x % 2 != 0 THEN x ELSE NULL END::numeric) s FROM generate_series(1,100) x
+        WHERE x % 5 != 0 AND x % 7 != 0
+    )
+SELECT round(unnest(CDB_EqualIntervalBins(s, 7)),7) FROM data_nulls;

test/CDB_EqualIntervalBinsTest_expect

@@ -5,3 +5,10 @@
 213.8571429
 256.4285714
 299.0000000
+15.0000000
+29.0000000
+43.0000000
+57.0000000
+71.0000000
+85.0000000
+99.0000000

test/CDB_EstimateRowCountTest.sql

@@ -0,0 +1,10 @@
+SET client_min_messages TO error;
+\set VERBOSITY terse
+CREATE TABLE tmptab1(id INT);
+INSERT INTO tmptab1(id) VALUES (1), (2), (3);
+CREATE TABLE tmptab2(id INT, value NUMERIC);
+INSERT INTO tmptab2(id, value) VALUES (1, 10.0), (2, 20.0);
+SELECT CDB_EstimateRowCount('SELECT SUM(value) FROM tmptab1 INNER JOIN tmptab2 ON (tmptab1.id = tmptab2.id);') AS row_count;
+SELECT CDB_EstimateRowCount('UPDATE tmptab2 SET value = 30 WHERE id=2;') AS row_count;
+DROP TABLE tmptab2;
+DROP TABLE tmptab1;

test/CDB_EstimateRowCountTest_expect

@@ -0,0 +1,9 @@
+SET
+CREATE TABLE
+INSERT 0 3
+CREATE TABLE
+INSERT 0 2
+1
+1
+DROP TABLE
+DROP TABLE

test/CDB_FederatedServer.sql

@@ -0,0 +1,220 @@
+-- Setup
+\set QUIET on
+SET client_min_messages TO error;
+\set VERBOSITY terse
+SET SESSION AUTHORIZATION postgres;
+CREATE EXTENSION postgres_fdw;
+\set QUIET off
+
+\echo '## List empty servers shows nothing'
+SELECT '1.1', cartodb.CDB_Federated_Server_List_Servers();
+
+\echo '## List non-existent server shows nothing'
+SELECT '1.2', cartodb.CDB_Federated_Server_List_Servers(server => 'doesNotExist');
+
+\echo '## Create and list a server works'
+SELECT '1.3', cartodb.CDB_Federated_Server_Register_PG(server => 'myRemote'::text, config => '{
+    "server": {
+        "host": "localhost",
+        "port": @@PGPORT@@
+    },
+    "credentials": {
+        "username": "fdw_user",
+        "password": "foobarino"
+    }
+}'::jsonb);
+SELECT '1.4', cartodb.CDB_Federated_Server_List_Servers();
+
+\echo '## Create and list a second server works'
+SELECT '2.1', cartodb.CDB_Federated_Server_Register_PG(server => 'myRemote2'::text, config => '{
+    "server": {
+        "dbname": "fdw_target",
+        "host": "localhost",
+        "port": @@PGPORT@@,
+        "extensions": "postgis",
+        "updatable": "false",
+        "use_remote_estimate": "true",
+        "fetch_size": "1000"
+    },
+    "credentials": {
+        "username": "fdw_user",
+        "password": "foobarino"
+    }
+}'::jsonb);
+SELECT '2.2', cartodb.CDB_Federated_Server_List_Servers();
+
+\echo '## List server by name works'
+SELECT '2.3', cartodb.CDB_Federated_Server_List_Servers(server => 'myRemote');
+
+
+\echo '## Re-register a second server works'
+SELECT '3.1', cartodb.CDB_Federated_Server_Register_PG(server => 'myRemote2'::text, config => '{
+    "server": {
+        "dbname": "fdw_target",
+        "host": "localhost",
+        "port": @@PGPORT@@,
+        "extensions": "postgis",
+        "updatable": "false",
+        "use_remote_estimate": "true",
+        "fetch_size": "1000"
+    },
+    "credentials": {
+        "username": "other_remote_user",
+        "password": "foobarino"
+    }
+}'::jsonb);
+SELECT '3.2', cartodb.CDB_Federated_Server_List_Servers();
+
+\echo '## Unregister server 1 works'
+SELECT '4.1', cartodb.CDB_Federated_Server_Unregister(server => 'myRemote'::text);
+SELECT '4.2', cartodb.CDB_Federated_Server_List_Servers();
+
+\echo '## Unregistering a server that does not exist fails'
+SELECT '5.1', cartodb.CDB_Federated_Server_Unregister(server => 'doesNotExist'::text);
+
+\echo '## Unregister the second server works'
+SELECT '6.1', cartodb.CDB_Federated_Server_Unregister(server => 'myRemote2'::text);
+SELECT '6.2', cartodb.CDB_Federated_Server_List_Servers();
+
+\echo '## Create a server with NULL name fails'
+SELECT '7.0', cartodb.CDB_Federated_Server_Register_PG(server => NULL::text, config => '{ "server": {}, "credentials" : {}}');
+\echo '## Create a server with NULL config fails'
+SELECT '7.01', cartodb.CDB_Federated_Server_Register_PG(server => 'empty'::text, config => NULL::jsonb);
+\echo '## Create a server with empty config fails'
+SELECT '7.1', cartodb.CDB_Federated_Server_Register_PG(server => 'empty'::text, config => '{}');
+\echo '## Create a server without credentials fails'
+SELECT '7.2', cartodb.CDB_Federated_Server_Register_PG(server => 'empty'::text, config => '{
+    "server": {
+        "dbname": "fdw_target",
+        "host": "localhost",
+        "port": @@PGPORT@@,
+        "extensions": "postgis",
+        "updatable": "false",
+        "use_remote_estimate": "true",
+        "fetch_size": "1000"
+    }
+}'::jsonb);
+\echo '## Create a server with empty credentials works'
+SELECT '7.3', cartodb.CDB_Federated_Server_Register_PG(server => 'empty'::text, config => '{
+    "server": {
+        "dbname": "fdw_target",
+        "host": "localhost",
+        "port": @@PGPORT@@,
+        "extensions": "postgis",
+        "updatable": "false",
+        "use_remote_estimate": "true",
+        "fetch_size": "1000"
+    },
+    "credentials": { }
+}'::jsonb);
+SELECT '7.4', cartodb.CDB_Federated_Server_List_Servers();
+SELECT '7.5', cartodb.CDB_Federated_Server_Unregister(server => 'empty'::text);
+\echo '## Create a server without options fails'
+SELECT '7.6', cartodb.CDB_Federated_Server_Register_PG(server => 'empty'::text, config => '{
+    "credentials": {
+        "username": "other_remote_user",
+        "password": "foobarino"
+    }
+}'::jsonb);
+
+\echo '## Create a server with special characters works'
+SELECT '8.1', cartodb.CDB_Federated_Server_Register_PG(server => 'myRemote" or''not'::text, config => '{
+    "server": {
+        "dbname": "fdw target",
+        "host": "localhost",
+        "port": @@PGPORT@@,
+        "extensions": "postgis",
+        "updatable": "false",
+        "use_remote_estimate": "true",
+        "fetch_size": "1000"
+    },
+    "credentials": {
+        "username": "fdw user",
+        "password": "foo barino"
+    }
+}'::jsonb);
+SELECT '8.2', cartodb.CDB_Federated_Server_List_Servers();
+SELECT '8.3', cartodb.CDB_Federated_Server_Unregister(server => 'myRemote" or''not'::text);
+
+-- Test permissions
+\set QUIET on
+CREATE ROLE cdb_fs_tester LOGIN PASSWORD 'cdb_fs_passwd';
+GRANT CONNECT ON DATABASE contrib_regression TO cdb_fs_tester;
+\set QUIET off
+
+SELECT '9.1', cartodb.CDB_Federated_Server_Register_PG(server => 'myRemote3'::text, config => '{
+    "server": {
+        "host": "localhost",
+        "port": @@PGPORT@@
+    },
+    "credentials": {
+        "username": "fdw_user",
+        "password": "foobarino"
+    }
+}'::jsonb);
+
+\c contrib_regression cdb_fs_tester
+
+\echo '## All users are able to list servers'
+SELECT '9.2', cartodb.CDB_Federated_Server_List_Servers();
+
+\echo '## Only superadmins can create servers'
+SELECT '9.3', cartodb.CDB_Federated_Server_Register_PG(server => 'myRemote4'::text, config => '{
+    "server": {
+        "host": "localhost",
+        "port": @@PGPORT@@
+    },
+    "credentials": {
+        "username": "fdw_user",
+        "password": "foobarino"
+    }
+}'::jsonb);
+
+
+\c contrib_regression postgres
+
+\echo '## Granting access to a user works'
+SELECT '9.5', cartodb.CDB_Federated_Server_Grant_Access(server => 'myRemote3', db_role => 'cdb_fs_tester'::name);
+\c contrib_regression cdb_fs_tester
+SELECT '9.55', cartodb.CDB_Federated_Server_List_Servers();
+\c contrib_regression postgres
+SELECT '9.6', cartodb.CDB_Federated_Server_Grant_Access(server => 'does not exist', db_role => 'cdb_fs_tester'::name);
+SELECT '9.7', cartodb.CDB_Federated_Server_Grant_Access(server => 'myRemote3', db_role => 'does not exist'::name);
+
+\echo '## Granting access again raises a notice'
+SELECT '9.8', cartodb.CDB_Federated_Server_Grant_Access(server => 'myRemote3', db_role => 'cdb_fs_tester'::name);
+
+\echo '## Revoking access to a user works'
+SELECT '9.9', cartodb.CDB_Federated_Server_Revoke_Access(server => 'myRemote3', db_role => 'cdb_fs_tester'::name);
+SELECT '9.10', cartodb.CDB_Federated_Server_Grant_Access(server => 'myRemote3', db_role => 'cdb_fs_tester'::name);
+
+\echo '## Unregistering a server with active grants works'
+SELECT '9.11', cartodb.CDB_Federated_Server_Unregister(server => 'myRemote3'::text);
+
+
+\echo '## A user with granted access can not drop a server'
+SELECT '10.1', cartodb.CDB_Federated_Server_Register_PG(server => 'myRemote4'::text, config => '{
+    "server": {
+        "host": "localhost",
+        "port": @@PGPORT@@
+    },
+    "credentials": {
+        "username": "fdw_user",
+        "password": "foobarino"
+    }
+}'::jsonb);
+SELECT '10.2', cartodb.CDB_Federated_Server_Grant_Access(server => 'myRemote4', db_role => 'cdb_fs_tester'::name);
+
+\c contrib_regression cdb_fs_tester
+SELECT '10.3', cartodb.CDB_Federated_Server_Unregister(server => 'myRemote4'::text);
+
+\c contrib_regression postgres
+SELECT '10.4', cartodb.CDB_Federated_Server_Unregister(server => 'myRemote4'::text);
+
+
+-- Cleanup
+\set QUIET on
+REVOKE CONNECT ON DATABASE contrib_regression FROM cdb_fs_tester;
+DROP ROLE cdb_fs_tester;
+DROP EXTENSION postgres_fdw;
+\set QUIET off

test/CDB_FederatedServerDiagnostics.sql

@@ -0,0 +1,125 @@
+-- ===================================================================
+-- create FDW objects
+-- ===================================================================
+\set QUIET on
+SET client_min_messages TO error;
+\set VERBOSITY terse
+CREATE EXTENSION postgres_fdw;
+
+CREATE ROLE cdb_fs_tester LOGIN PASSWORD 'cdb_fs_passwd';
+GRANT CONNECT ON DATABASE contrib_regression TO cdb_fs_tester;
+
+-- Create database to be used as remote
+CREATE DATABASE cdb_fs_tester OWNER cdb_fs_tester;
+
+SELECT 'C1', cartodb.CDB_Federated_Server_Register_PG(server => 'loopback'::text, config => '{
+    "server": {
+        "host": "localhost",
+        "port": @@PGPORT@@
+    },
+    "credentials": {
+        "username": "cdb_fs_tester",
+        "password": "cdb_fs_passwd"
+    }
+}'::jsonb);
+
+SELECT 'C2', cartodb.CDB_Federated_Server_Register_PG(server => 'wrong-port'::text, config => '{
+    "server": {
+        "host": "localhost",
+        "port": "12345"
+    },
+    "credentials": {
+        "username": "cdb_fs_tester",
+        "password": "cdb_fs_passwd"
+    }
+}'::jsonb);
+
+SELECT 'C3', cartodb.CDB_Federated_Server_Register_PG(server => 'loopback-no-port'::text, config => '{
+    "server": {
+        "host": "localhost"
+    },
+    "credentials": {
+        "username": "cdb_fs_tester",
+        "password": "cdb_fs_passwd"
+    }
+}'::jsonb);
+
+\c cdb_fs_tester postgres
+CREATE EXTENSION postgis;
+\c contrib_regression postgres
+\set QUIET off
+
+
+-- ===================================================================
+-- Test server diagnostics function(s)
+-- ===================================================================
+\echo '%% It raises an error if the server does not exist'
+SELECT '1.1', cartodb.CDB_Federated_Server_Diagnostics(server => 'doesNotExist');
+
+\echo '%% It returns a jsonb object'
+SELECT '1.2', pg_typeof(cartodb.CDB_Federated_Server_Diagnostics(server => 'loopback'));
+
+\echo '%% It returns the server version'
+SELECT '1.3', cartodb.CDB_Federated_Server_Diagnostics(server => 'loopback') @> format('{"server_version": "%s"}', setting)::jsonb
+    FROM pg_settings WHERE name = 'server_version';
+
+\echo '%% It returns the postgis version'
+SELECT '1.4', cartodb.CDB_Federated_Server_Diagnostics(server => 'loopback') @> format('{"postgis_version": "%s"}', extversion)::jsonb
+    FROM pg_extension WHERE extname = 'postgis';
+
+\echo '%% It returns null as the postgis version if it is not installed'
+\set QUIET on
+\c cdb_fs_tester postgres
+DROP EXTENSION postgis;
+\c contrib_regression postgres
+\set QUIET off
+SELECT '1.5', cartodb.CDB_Federated_Server_Diagnostics(server => 'loopback') @> '{"postgis_version": null}'::jsonb;
+
+\echo '%% It returns the remote server options'
+SELECT '1.6', cartodb.CDB_Federated_Server_Diagnostics(server => 'loopback') @> '{"server_options": {"host": "localhost", "port": "@@PGPORT@@", "updatable": "false", "extensions": "postgis", "fetch_size": "1000", "use_remote_estimate": "true"}}'::jsonb;
+
+\echo '%% It returns network latency stats to the remote server: min <= avg <= max'
+WITH latency AS (
+   SELECT CDB_Federated_Server_Diagnostics('loopback')->'server_latency_ms' ms
+) SELECT '2.1', (latency.ms->'min')::text::float <= (latency.ms->'avg')::text::float, (latency.ms->'avg')::text::float <= (latency.ms->'max')::text::float
+FROM latency;
+
+\echo '%% Latency stats: 0 <= min <= max <= 1000 ms (local connection)'
+WITH latency AS (
+   SELECT CDB_Federated_Server_Diagnostics('loopback')->'server_latency_ms' ms
+) SELECT '2.2', 0.0 <= (latency.ms->'min')::text::float, (latency.ms->'max')::text::float <= 1000.0
+FROM latency;
+
+\echo '%% Latency stats: stdev > 0'
+WITH latency AS (
+   SELECT CDB_Federated_Server_Diagnostics('loopback')->'server_latency_ms' ms
+) SELECT '2.3', (latency.ms->'stdev')::text::float >= 0.0
+FROM latency;
+
+\echo '%% It raises an error if the wrong port is provided'
+SELECT '3.0', cartodb.CDB_Federated_Server_Diagnostics(server => 'wrong-port');
+
+\echo '%% Latency stats: can get them on default PG port 5432 when not provided'
+WITH latency AS (
+   SELECT CDB_Federated_Server_Diagnostics('loopback-no-port')->'server_latency_ms' ms
+) SELECT '2.4', 0.0 <= (latency.ms->'min')::text::float, (latency.ms->'max')::text::float <= 1000.0
+FROM latency;
+
+
+-- ===================================================================
+-- Cleanup
+-- ===================================================================
+\set QUIET on
+SELECT 'D1', cartodb.CDB_Federated_Server_Unregister(server => 'loopback'::text);
+SELECT 'D2', cartodb.CDB_Federated_Server_Unregister(server => 'wrong-port'::text);
+SELECT 'D3', cartodb.CDB_Federated_Server_Unregister(server => 'loopback-no-port'::text);
+-- Reconnect, using a new session in order to close FDW connections
+\connect
+DROP DATABASE cdb_fs_tester;
+
+-- Drop role
+REVOKE CONNECT ON DATABASE contrib_regression FROM cdb_fs_tester;
+DROP ROLE cdb_fs_tester;
+
+DROP EXTENSION postgres_fdw;
+\set QUIET off

test/CDB_FederatedServerDiagnostics_expect

@@ -0,0 +1,28 @@
+C1|
+C2|
+C3|
+%% It raises an error if the server does not exist
+ERROR:  Server "doesNotExist" does not exist
+%% It returns a jsonb object
+1.2|jsonb
+%% It returns the server version
+1.3|t
+%% It returns the postgis version
+1.4|t
+%% It returns null as the postgis version if it is not installed
+1.5|t
+%% It returns the remote server options
+1.6|t
+%% It returns network latency stats to the remote server: min <= avg <= max
+2.1|t|t
+%% Latency stats: 0 <= min <= max <= 1000 ms (local connection)
+2.2|t|t
+%% Latency stats: stdev > 0
+2.3|t
+%% It raises an error if the wrong port is provided
+ERROR:  could not connect to server "cdb_fs_wrong-port"
+%% Latency stats: can get them on default PG port 5432 when not provided
+2.4|t|t
+D1|
+D2|
+D3|

test/CDB_FederatedServerListRemote.sql

@@ -0,0 +1,319 @@
+-- ===================================================================
+-- create FDW objects
+-- ===================================================================
+\set QUIET on
+SET client_min_messages TO error;
+\set VERBOSITY terse
+CREATE EXTENSION postgres_fdw;
+
+CREATE ROLE cdb_fs_tester LOGIN PASSWORD 'cdb_fs_passwd';
+GRANT CONNECT ON DATABASE contrib_regression TO cdb_fs_tester;
+CREATE ROLE cdb_fs_tester2 LOGIN PASSWORD 'cdb_fs_passwd2';
+GRANT CONNECT ON DATABASE contrib_regression TO cdb_fs_tester2;
+
+-- Create database to be used as remote
+CREATE DATABASE cdb_fs_tester OWNER cdb_fs_tester;
+
+SELECT 'C1', cartodb.CDB_Federated_Server_Register_PG(server => 'loopback'::text, config => '{
+    "server": {
+        "host": "localhost",
+        "port": @@PGPORT@@
+    },
+    "credentials": {
+        "username": "cdb_fs_tester",
+        "password": "cdb_fs_passwd"
+    }
+}'::jsonb);
+
+SELECT 'C2', cartodb.CDB_Federated_Server_Register_PG(server => 'loopback2'::text, config => '{
+    "server": {
+        "host": "localhost",
+        "port": @@PGPORT@@
+    },
+    "credentials": {
+        "username": "cdb_fs_tester",
+        "password": "cdb_fs_passwd"
+    }
+}'::jsonb);
+
+-- ===================================================================
+-- Setup 1
+-- ===================================================================
+\c cdb_fs_tester cdb_fs_tester
+
+CREATE TYPE user_enum AS ENUM ('foo', 'bar', 'buz');
+CREATE SCHEMA "S 1";
+CREATE TABLE "S 1"."T 1" (
+	"C 1" int NOT NULL,
+	c2 int NOT NULL,
+	c3 text,
+	c4 timestamptz,
+	c5 timestamp,
+	c6 varchar(10),
+	c7 char(10),
+	c8 user_enum,
+	CONSTRAINT t1_pkey PRIMARY KEY ("C 1")
+);
+CREATE TABLE "S 1"."T 2" (
+	c1 int NOT NULL,
+	c2 text,
+	CONSTRAINT t2_pkey PRIMARY KEY (c1)
+);
+CREATE TABLE "S 1"."T 3" (
+	c1 int NOT NULL,
+	c2 int NOT NULL,
+	c3 text,
+	CONSTRAINT t3_pkey PRIMARY KEY (c1)
+);
+CREATE TABLE "S 1"."T 4" (
+	c1 int NOT NULL,
+	c2 int NOT NULL,
+	c3 text,
+	CONSTRAINT t4_pkey PRIMARY KEY (c1)
+);
+
+-- Disable autovacuum for these tables to avoid unexpected effects of that
+ALTER TABLE "S 1"."T 1" SET (autovacuum_enabled = 'false');
+ALTER TABLE "S 1"."T 2" SET (autovacuum_enabled = 'false');
+ALTER TABLE "S 1"."T 3" SET (autovacuum_enabled = 'false');
+ALTER TABLE "S 1"."T 4" SET (autovacuum_enabled = 'false');
+
+\c contrib_regression postgres
+SET client_min_messages TO notice;
+\set VERBOSITY terse
+\set QUIET off
+
+
+-- ===================================================================
+-- Test listing remote schemas
+-- ===================================================================
+\echo '## Test listing of remote schemas without permissions before the first instantiation (rainy day)'
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Schemas(server => 'loopback');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote schemas (sunny day)'
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Schemas(server => 'loopback');
+
+\echo '## Test listing of remote schemas without permissions after the first instantiation (rainy day)'
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Schemas(server => 'loopback');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote schemas with permissions (sunny day)'
+SELECT cartodb.CDB_Federated_Server_Grant_Access(server => 'loopback', db_role => 'cdb_fs_tester'::name);
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Schemas(server => 'loopback');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote schemas without permissions after revoking access (rainy day)'
+SELECT cartodb.CDB_Federated_Server_Revoke_Access(server => 'loopback', db_role => 'cdb_fs_tester'::name);
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Schemas(server => 'loopback');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote schemas (rainy day): Server does not exist'
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Schemas(server => 'Does Not Exist');
+
+
+-- ===================================================================
+-- Test listing remote tables
+-- ===================================================================
+
+\echo '## Test listing of remote tables without permissions before the first instantiation (rainy day)'
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'S 1');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote tables (sunny day)'
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'S 1');
+
+\echo '## Test listing of remote tables without permissions after the first instantiation (rainy day)'
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'S 1');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote tables with permissions (sunny day)'
+SELECT cartodb.CDB_Federated_Server_Grant_Access(server => 'loopback', db_role => 'cdb_fs_tester'::name);
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'S 1');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote tables without permissions after revoking access (rainy day)'
+SELECT cartodb.CDB_Federated_Server_Revoke_Access(server => 'loopback', db_role => 'cdb_fs_tester'::name);
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'S 1');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote tables (rainy day): Server does not exist'
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'Does Not Exist', remote_schema => 'S 1');
+
+\echo '## Test listing of remote tables (rainy day): Remote schema does not exist'
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'Does Not Exist');
+
+
+-- ===================================================================
+-- Test listing remote columns
+-- ===================================================================
+
+\echo '## Test listing of remote columns without permissions before the first instantiation (rainy day)'
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback', remote_schema => 'S 1', remote_table => 'T 1');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote columns (sunny day)'
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback', remote_schema => 'S 1', remote_table => 'T 1');
+
+\echo '## Test listing of remote columns without permissions after the first instantiation (rainy day)'
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback', remote_schema => 'S 1', remote_table => 'T 1');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote columns with permissions (sunny day)'
+SELECT cartodb.CDB_Federated_Server_Grant_Access(server => 'loopback', db_role => 'cdb_fs_tester'::name);
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback', remote_schema => 'S 1', remote_table => 'T 1');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote columns without permissions after revoking access (rainy day)'
+SELECT cartodb.CDB_Federated_Server_Revoke_Access(server => 'loopback', db_role => 'cdb_fs_tester'::name);
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback', remote_schema => 'S 1', remote_table => 'T 1');
+\c contrib_regression postgres
+
+\echo '## Test listing of remote columns (rainy day): Server does not exist'
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'Does Not Exist', remote_schema => 'S 1', remote_table => 'T 1');
+
+\echo '## Test listing of remote columns (rainy day): Remote schema does not exist'
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback', remote_schema => 'Does Not Exist', remote_table => 'T 1');
+
+\echo '## Test listing of remote columns (rainy day): Remote table does not exist'
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback', remote_schema => 'S 1', remote_table => 'Does Not Exist');
+
+\echo '## Test listing of remote columns (rainy day): Remote table is NULL'
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback', remote_schema => 'S 1', remote_table => NULL::text);
+
+
+-- ===================================================================
+-- Test that using a different user to list tables and dropping it
+-- does not break the server: We use loopback2 as it's in a clean state
+-- ===================================================================
+
+
+\echo '## Test listing of remote objects with permissions (sunny day)'
+SELECT cartodb.CDB_Federated_Server_Grant_Access(server => 'loopback2', db_role => 'cdb_fs_tester2'::name);
+\c contrib_regression cdb_fs_tester2
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Schemas(server => 'loopback2');
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback2', remote_schema => 'S 1');
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback2', remote_schema => 'S 1', remote_table => 'T 1');
+
+\c contrib_regression postgres
+\echo '## Test that dropping the granted user works fine (sunny day)'
+REVOKE CONNECT ON DATABASE contrib_regression FROM cdb_fs_tester2;
+DROP ROLE cdb_fs_tester2;
+
+\echo '## Test listing of remote objects with other user still works (sunny day)'
+SELECT cartodb.CDB_Federated_Server_Grant_Access(server => 'loopback2', db_role => 'cdb_fs_tester'::name);
+\c contrib_regression cdb_fs_tester
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Schemas(server => 'loopback2');
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback2', remote_schema => 'S 1');
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback2', remote_schema => 'S 1', remote_table => 'T 1');
+
+
+-- ===================================================================
+-- Cleanup 1
+-- ===================================================================
+\set QUIET on
+
+\c cdb_fs_tester cdb_fs_tester
+DROP TABLE "S 1". "T 1";
+DROP TABLE "S 1". "T 2";
+DROP TABLE "S 1". "T 3";
+DROP TABLE "S 1". "T 4";
+
+DROP SCHEMA "S 1";
+DROP TYPE user_enum;
+
+
+-- ===================================================================
+-- Setup 2: Using Postgis too
+-- ===================================================================
+
+\c cdb_fs_tester postgres
+
+CREATE EXTENSION postgis;
+
+\c cdb_fs_tester cdb_fs_tester
+
+CREATE SCHEMA "S 1";
+CREATE TABLE "S 1"."T 5" (
+	geom       geometry(Geometry,4326),
+	geom_wm    geometry(GeometryZ,3857),
+	geo_nosrid geometry,
+	geog       geography
+);
+
+\c contrib_regression postgres
+SET client_min_messages TO notice;
+\set VERBOSITY terse
+\set QUIET off
+
+
+-- ===================================================================
+-- Test the listing functions
+-- ===================================================================
+
+\echo '## Test listing of remote geometry columns (sunny day)'
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback', remote_schema => 'S 1', remote_table => 'T 5');
+\echo '## Test listing of remote geometry columns (sunny day) - Rerun'
+-- Rerun should be ok
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Columns(server => 'loopback', remote_schema => 'S 1', remote_table => 'T 5');
+
+
+-- ===================================================================
+-- Test invalid password
+-- ===================================================================
+
+\echo '## Check error message with invalid password (rainy day)'
+SELECT cartodb.CDB_Federated_Server_Register_PG(server => 'loopback_invalid'::text, config => '{
+    "server": {
+        "host": "localhost",
+        "port": @@PGPORT@@
+    },
+    "credentials": {
+        "username": "cdb_fs_tester",
+        "password": "wrong password"
+    }
+}'::jsonb);
+
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Schemas(server => 'loopback_invalid');
+
+SELECT cartodb.CDB_Federated_Server_Unregister(server => 'loopback_invalid'::text);
+
+-- ===================================================================
+-- Cleanup 2
+-- ===================================================================
+\set QUIET on
+
+\c cdb_fs_tester cdb_fs_tester
+DROP TABLE "S 1". "T 5";
+
+DROP SCHEMA "S 1";
+
+\c contrib_regression postgres
+\set QUIET on
+SET client_min_messages TO error;
+\set VERBOSITY terse
+
+SELECT 'D1', cartodb.CDB_Federated_Server_Unregister(server => 'loopback'::text);
+SELECT 'D2', cartodb.CDB_Federated_Server_Unregister(server => 'loopback2'::text);
+
+DROP DATABASE cdb_fs_tester;
+
+-- Drop role
+REVOKE CONNECT ON DATABASE contrib_regression FROM cdb_fs_tester;
+DROP ROLE cdb_fs_tester;
+
+DROP EXTENSION postgres_fdw;
+
+\set QUIET off

test/CDB_FederatedServerListRemote_expect

@@ -0,0 +1,162 @@
+C1|
+C2|
+## Test listing of remote schemas without permissions before the first instantiation (rainy day)
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+ERROR:  Not enough permissions to access the server "loopback"
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote schemas (sunny day)
+S 1
+information_schema
+public
+## Test listing of remote schemas without permissions after the first instantiation (rainy day)
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+ERROR:  Not enough permissions to access the server "loopback"
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote schemas with permissions (sunny day)
+
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+S 1
+information_schema
+public
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote schemas without permissions after revoking access (rainy day)
+
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+ERROR:  Not enough permissions to access the server "loopback"
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote schemas (rainy day): Server does not exist
+ERROR:  Server "Does Not Exist" does not exist
+## Test listing of remote tables without permissions before the first instantiation (rainy day)
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+ERROR:  Not enough permissions to access the server "loopback"
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote tables (sunny day)
+INFO:  Could not find Postgis installation in the remote "public" schema in server "loopback"
+f|T 1|||||[{"Name" : "C 1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}, {"Name" : "c4", "Type" : "timestamp with time zone"}, {"Name" : "c5", "Type" : "timestamp without time zone"}, {"Name" : "c6", "Type" : "character varying"}, {"Name" : "c7", "Type" : "character"}, {"Name" : "c8", "Type" : "USER-DEFINED"}]
+f|T 2|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "text"}]
+f|T 3|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}]
+f|T 4|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}]
+## Test listing of remote tables without permissions after the first instantiation (rainy day)
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+ERROR:  Not enough permissions to access the server "loopback"
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote tables with permissions (sunny day)
+
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+INFO:  Could not find Postgis installation in the remote "public" schema in server "loopback"
+f|T 1|||||[{"Name" : "C 1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}, {"Name" : "c4", "Type" : "timestamp with time zone"}, {"Name" : "c5", "Type" : "timestamp without time zone"}, {"Name" : "c6", "Type" : "character varying"}, {"Name" : "c7", "Type" : "character"}, {"Name" : "c8", "Type" : "USER-DEFINED"}]
+f|T 2|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "text"}]
+f|T 3|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}]
+f|T 4|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}]
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote tables without permissions after revoking access (rainy day)
+
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+ERROR:  Not enough permissions to access the server "loopback"
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote tables (rainy day): Server does not exist
+ERROR:  Server "Does Not Exist" does not exist
+## Test listing of remote tables (rainy day): Remote schema does not exist
+## Test listing of remote columns without permissions before the first instantiation (rainy day)
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+ERROR:  Not enough permissions to access the server "loopback"
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote columns (sunny day)
+INFO:  Could not find Postgis installation in the remote "public" schema in server "loopback"
+C 1|integer
+c2|integer
+c3|text
+c4|timestamp with time zone
+c5|timestamp without time zone
+c6|character varying
+c7|character
+c8|USER-DEFINED
+## Test listing of remote columns without permissions after the first instantiation (rainy day)
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+ERROR:  Not enough permissions to access the server "loopback"
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote columns with permissions (sunny day)
+
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+INFO:  Could not find Postgis installation in the remote "public" schema in server "loopback"
+C 1|integer
+c2|integer
+c3|text
+c4|timestamp with time zone
+c5|timestamp without time zone
+c6|character varying
+c7|character
+c8|USER-DEFINED
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote columns without permissions after revoking access (rainy day)
+
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+ERROR:  Not enough permissions to access the server "loopback"
+You are now connected to database "contrib_regression" as user "postgres".
+## Test listing of remote columns (rainy day): Server does not exist
+ERROR:  Server "Does Not Exist" does not exist
+## Test listing of remote columns (rainy day): Remote schema does not exist
+## Test listing of remote columns (rainy day): Remote table does not exist
+INFO:  Could not find Postgis installation in the remote "public" schema in server "loopback"
+## Test listing of remote columns (rainy day): Remote table is NULL
+ERROR:  Remote table name cannot be NULL
+## Test listing of remote objects with permissions (sunny day)
+
+You are now connected to database "contrib_regression" as user "cdb_fs_tester2".
+S 1
+information_schema
+public
+INFO:  Could not find Postgis installation in the remote "public" schema in server "loopback2"
+f|T 1|||||[{"Name" : "C 1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}, {"Name" : "c4", "Type" : "timestamp with time zone"}, {"Name" : "c5", "Type" : "timestamp without time zone"}, {"Name" : "c6", "Type" : "character varying"}, {"Name" : "c7", "Type" : "character"}, {"Name" : "c8", "Type" : "USER-DEFINED"}]
+f|T 2|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "text"}]
+f|T 3|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}]
+f|T 4|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}]
+INFO:  Could not find Postgis installation in the remote "public" schema in server "loopback2"
+C 1|integer
+c2|integer
+c3|text
+c4|timestamp with time zone
+c5|timestamp without time zone
+c6|character varying
+c7|character
+c8|USER-DEFINED
+You are now connected to database "contrib_regression" as user "postgres".
+## Test that dropping the granted user works fine (sunny day)
+REVOKE
+DROP ROLE
+## Test listing of remote objects with other user still works (sunny day)
+
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+S 1
+information_schema
+public
+INFO:  Could not find Postgis installation in the remote "public" schema in server "loopback2"
+f|T 1|||||[{"Name" : "C 1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}, {"Name" : "c4", "Type" : "timestamp with time zone"}, {"Name" : "c5", "Type" : "timestamp without time zone"}, {"Name" : "c6", "Type" : "character varying"}, {"Name" : "c7", "Type" : "character"}, {"Name" : "c8", "Type" : "USER-DEFINED"}]
+f|T 2|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "text"}]
+f|T 3|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}]
+f|T 4|||||[{"Name" : "c1", "Type" : "integer"}, {"Name" : "c2", "Type" : "integer"}, {"Name" : "c3", "Type" : "text"}]
+INFO:  Could not find Postgis installation in the remote "public" schema in server "loopback2"
+C 1|integer
+c2|integer
+c3|text
+c4|timestamp with time zone
+c5|timestamp without time zone
+c6|character varying
+c7|character
+c8|USER-DEFINED
+## Test listing of remote geometry columns (sunny day)
+geo_nosrid|GEOMETRY,0
+geog|Geometry,0
+geom|GEOMETRY,4326
+geom_wm|GEOMETRY,3857
+## Test listing of remote geometry columns (sunny day) - Rerun
+geo_nosrid|GEOMETRY,0
+geog|Geometry,0
+geom|GEOMETRY,4326
+geom_wm|GEOMETRY,3857
+## Check error message with invalid password (rainy day)
+
+ERROR:  could not connect to server "cdb_fs_loopback_invalid"
+
+D1|
+D2|

test/CDB_FederatedServerTables.sql

@@ -0,0 +1,405 @@
+-- ===================================================================
+-- create FDW objects
+-- ===================================================================
+\set QUIET on
+SET client_min_messages TO error;
+\set VERBOSITY terse
+
+CREATE EXTENSION postgres_fdw;
+
+-- We create a username following the same steps as organization members
+CREATE ROLE cdb_fs_tester LOGIN PASSWORD 'cdb_fs_passwd';
+GRANT CONNECT ON DATABASE contrib_regression TO cdb_fs_tester;
+
+CREATE ROLE cdb_fs_tester2 LOGIN PASSWORD 'cdb_fs_passwd2';
+GRANT CONNECT ON DATABASE contrib_regression TO cdb_fs_tester2;
+
+-- Create database to be used as remote
+CREATE DATABASE cdb_fs_tester OWNER cdb_fs_tester;
+
+SELECT 'C1', cartodb.CDB_Federated_Server_Register_PG(server := 'loopback'::text, config := '{
+    "server": {
+        "host": "localhost",
+        "port": @@PGPORT@@
+    },
+    "credentials": {
+        "username": "cdb_fs_tester",
+        "password": "cdb_fs_passwd"
+    }
+}'::jsonb);
+
+
+-- ===================================================================
+-- create objects used through FDW loopback server
+-- ===================================================================
+
+\c cdb_fs_tester postgres
+
+CREATE EXTENSION postgis;
+
+\c cdb_fs_tester cdb_fs_tester
+
+CREATE SCHEMA remote_schema;
+CREATE TABLE remote_schema.remote_geom(id int, another_field text, geom geometry(Geometry,4326));
+
+INSERT INTO remote_schema.remote_geom VALUES (1, 'patata', 'SRID=4326;POINT(1 1)'::geometry);
+INSERT INTO remote_schema.remote_geom VALUES (2, 'patata2', 'SRID=4326;POINT(2 2)'::geometry);
+
+CREATE TABLE remote_schema.remote_geom2(cartodb_id bigint, another_field text, the_geom geometry(Geometry,4326), the_geom_webmercator geometry(Geometry,3857));
+
+INSERT INTO remote_schema.remote_geom2 VALUES (3, 'patata', 'SRID=4326;POINT(3 3)'::geometry, 'SRID=3857;POINT(3 3)');
+
+CREATE TABLE remote_schema.remote_other(id bigint, field text, field2 text);
+INSERT INTO remote_schema.remote_other VALUES (1, 'delicious', 'potatoes');
+
+CREATE TABLE remote_schema.remote_geom3(id bigint, geom geometry(Geometry,4326), geom_mercator geometry(Geometry,3857));
+
+-- ===================================================================
+-- Test the listing functions
+-- ===================================================================
+
+\c contrib_regression postgres
+SET client_min_messages TO error;
+\set VERBOSITY terse
+\set QUIET off
+
+\echo '## Registering an existing table works'
+SELECT 'R1', cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column => 'id',
+    geom_column => 'geom'
+    );
+
+SELECT 'S1', cartodb_id, ST_AsText(the_geom), another_field FROM cdb_fs_loopback.remote_geom;
+
+Select * FROM CDB_Federated_Server_List_Remote_Tables(
+    server => 'loopback',
+    remote_schema => 'remote_schema'
+);
+
+\echo '## Registering another existing table works'
+SELECT 'R2', cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom2',
+    id_column => 'cartodb_id',
+    geom_column => 'the_geom',
+    webmercator_column => 'the_geom_webmercator',
+    local_name => 'myFullTable'
+    );
+
+SELECT 'S2', cartodb_id, ST_AsText(the_geom), another_field FROM cdb_fs_loopback."myFullTable";
+Select * FROM CDB_Federated_Server_List_Remote_Tables(
+    server => 'loopback',
+    remote_schema => 'remote_schema'
+);
+
+\echo '## Re-registering a table works'
+SELECT 'R3', cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom2',
+    id_column => 'cartodb_id',
+    -- Switch geom and geom_column on purpose to force ST_Transform to be used
+    geom_column => 'the_geom_webmercator',
+    webmercator_column => 'the_geom',
+    local_name => 'different_name'
+    );
+
+-- The old view should dissapear
+SELECT 'S3_old', cartodb_id, another_field FROM cdb_fs_loopback."myFullTable";
+-- And the new appear
+SELECT 'S3_new', cartodb_id, another_field FROM cdb_fs_loopback.different_name;
+
+\echo '## Unregistering works'
+-- Deregistering the first table
+SELECT 'U1', cartodb.CDB_Federated_Table_Unregister(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom'
+    );
+-- Selecting from the created view should fail now
+SELECT 'UCheck1', cartodb_id, ST_AsText(the_geom), another_field FROM remote_geom;
+
+Select * FROM CDB_Federated_Server_List_Remote_Tables(
+    server => 'loopback',
+    remote_schema => 'remote_schema'
+);
+
+-- ===================================================================
+-- Test input
+-- ===================================================================
+
+\echo '## Registering a table: Invalid server fails'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'Does not exist',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column => 'id',
+    geom_column => 'geom'
+    );
+
+\echo '## Registering a table: NULL server fails'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => NULL::text,
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column => 'id',
+    geom_column => 'geom'
+    );
+
+\echo '## Registering a table: Invalid schema fails'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'Does not exist',
+    remote_table => 'remote_geom',
+    id_column => 'id',
+    geom_column => 'geom'
+    );
+
+\echo '## Registering a table: NULL schema fails'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => NULL::text,
+    remote_table => 'remote_geom',
+    id_column => 'id',
+    geom_column => 'geom'
+    );
+
+\echo '## Registering a table: Invalid table fails'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'Does not exist',
+    id_column => 'id',
+    geom_column => 'geom'
+    );
+
+\echo '## Registering a table: NULL table fails'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => NULL::text,
+    id_column => 'id',
+    geom_column => 'geom'
+    );
+
+\echo '## Registering a table: Invalid id fails'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column => 'Does not exist',
+    geom_column => 'geom'
+    );
+
+\echo '## Registering a table: NULL id fails'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column =>  NULL::text,
+    geom_column => 'geom'
+    );
+
+\echo '## Registering a table: Invalid geom_column fails'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column => 'id',
+    geom_column => 'Does not exists'
+    );
+
+\echo '## Registering a table: NULL geom_column is OK: Reuses geom_mercator'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column =>  'id',
+    geom_column => NULL::text,
+    webmercator_column => 'geom'
+    );
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'remote_schema') where remote_table = 'remote_geom';
+
+SELECT cartodb.CDB_Federated_Table_Unregister(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom'
+    );
+
+\echo '## Registering a table: Invalid webmercator_column fails'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column => 'id',
+    geom_column => 'geom',
+    webmercator_column => 'Does not exists'
+    );
+
+\echo '## Registering a table: NULL webmercator_column is OK: Reuses geom'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column =>  'id',
+    geom_column => 'geom',
+    webmercator_column => NULL::text
+    );
+SELECT * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'remote_schema') where remote_table = 'remote_geom';
+SELECT cartodb.CDB_Federated_Table_Unregister(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom'
+    );
+
+\echo '##Registering a table with extra columns show the correct information'
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom3',
+    id_column =>  'id',
+    geom_column => 'geom',
+    webmercator_column => 'geom_mercator'
+    );
+Select * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'remote_schema') where remote_table = 'remote_geom3';
+SELECT cartodb.CDB_Federated_Table_Unregister(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom3'
+    );
+
+-- ===================================================================
+-- Test conflicts
+-- ===================================================================
+
+\echo '## Target conflict is handled nicely: Table'
+CREATE TABLE cdb_fs_loopback.localtable (a integer);
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column =>  'id',
+    geom_column => 'geom',
+    local_name => 'localtable');
+
+\echo '## Target conflict is handled nicely: View'
+CREATE VIEW cdb_fs_loopback.localtable2 AS Select * from cdb_fs_loopback.localtable;
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column =>  'id',
+    geom_column => 'geom',
+    local_name => 'localtable2');
+
+DROP VIEW cdb_fs_loopback.localtable2;
+DROP TABLE cdb_fs_loopback.localtable;
+
+-- ===================================================================
+-- Test permissions
+-- ===================================================================
+
+
+\echo '## Registering tables does not work without permissions'
+\c contrib_regression cdb_fs_tester
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column =>  'id',
+    geom_column => 'geom',
+    local_name => 'localtable');
+
+\echo '## Normal users can not write in the import schema'
+CREATE TABLE cdb_fs_loopback.localtable (a integer);
+
+\echo '## Listing remote tables does not work without permissions'
+Select * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'remote_schema');
+
+\echo '## Registering tables works with granted permissions'
+\c contrib_regression postgres
+SELECT cartodb.CDB_Federated_Server_Grant_Access(server := 'loopback', db_role := 'cdb_fs_tester'::name);
+\c contrib_regression cdb_fs_tester
+SELECT cartodb.CDB_Federated_Table_Register(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom',
+    id_column =>  'id',
+    geom_column => 'geom',
+    local_name => 'localtable');
+
+\echo '## Listing remote tables works with granted permissions'
+Select * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'remote_schema');
+
+\echo '## Selecting from a registered table with granted permissions works'
+Select cartodb_id, ST_AsText(the_geom) from cdb_fs_loopback.localtable;
+
+\echo '## Selecting from a registered table without permissions does not work'
+\c contrib_regression cdb_fs_tester2
+CREATE OR REPLACE FUNCTION catch_permission_error(query text)
+RETURNS bool
+AS $$
+BEGIN
+    EXECUTE query;
+    RETURN FALSE;
+EXCEPTION
+    WHEN insufficient_privilege THEN
+        RETURN TRUE;
+    WHEN OTHERS THEN
+        RAISE WARNING 'Exception %', sqlstate;
+        RETURN FALSE;
+END
+$$ LANGUAGE 'plpgsql';
+Select catch_permission_error($$SELECT cartodb_id, ST_AsText(the_geom) from cdb_fs_loopback.localtable$$);
+DROP FUNCTION catch_permission_error(text);
+
+\echo '## Deleting a registered table without permissions does not work'
+SELECT cartodb.CDB_Federated_Table_Unregister(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom'
+    );
+
+\echo '## Only the owner can grant permissions over the server'
+SELECT cartodb.CDB_Federated_Server_Grant_Access(server := 'loopback', db_role := 'cdb_fs_tester2'::name);
+
+\echo '## Everything works for a different user when granted permissions'
+\c contrib_regression postgres
+SELECT cartodb.CDB_Federated_Server_Grant_Access(server := 'loopback', db_role := 'cdb_fs_tester2'::name);
+\c contrib_regression cdb_fs_tester2
+Select * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'remote_schema');
+Select cartodb_id, ST_AsText(the_geom) from cdb_fs_loopback.localtable;
+
+\echo '## A different user can unregister a table'
+SELECT cartodb.CDB_Federated_Table_Unregister(
+    server => 'loopback',
+    remote_schema => 'remote_schema',
+    remote_table => 'remote_geom'
+    );
+Select * FROM cartodb.CDB_Federated_Server_List_Remote_Tables(server => 'loopback', remote_schema => 'remote_schema');
+
+\echo '## Only the owner can revoke permissions over the server'
+SELECT cartodb.CDB_Federated_Server_Revoke_Access(server := 'loopback', db_role := 'cdb_fs_tester'::name);
+
+-- ===================================================================
+-- Cleanup
+-- ===================================================================
+
+\set QUIET on
+\c contrib_regression postgres
+SET client_min_messages TO error;
+\set VERBOSITY terse
+
+REVOKE CONNECT ON DATABASE contrib_regression FROM cdb_fs_tester2;
+DROP ROLE cdb_fs_tester2;
+
+SELECT 'D1', cartodb.CDB_Federated_Server_Unregister(server := 'loopback'::text);
+DROP DATABASE cdb_fs_tester;
+REVOKE CONNECT ON DATABASE contrib_regression FROM cdb_fs_tester;
+DROP ROLE cdb_fs_tester;
+DROP EXTENSION postgres_fdw;
+\set QUIET off

test/CDB_FederatedServerTables_expect

@@ -0,0 +1,116 @@
+C1|
+## Registering an existing table works
+R1|
+S1|1|POINT(1 1)|patata
+S1|2|POINT(2 2)|patata2
+t|remote_geom|cdb_fs_loopback.remote_geom|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
+f|remote_geom2|||||[{"Name" : "another_field", "Type" : "text"}, {"Name" : "cartodb_id", "Type" : "bigint"}, {"Name" : "the_geom", "Type" : "GEOMETRY,4326"}, {"Name" : "the_geom_webmercator", "Type" : "GEOMETRY,3857"}]
+f|remote_geom3|||||[{"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
+f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
+## Registering another existing table works
+R2|
+S2|3|POINT(3 3)|patata
+t|remote_geom|cdb_fs_loopback.remote_geom|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
+t|remote_geom2|cdb_fs_loopback."myFullTable"|cartodb_id|the_geom|the_geom_webmercator|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "cartodb_id", "Type" : "bigint"}, {"Name" : "the_geom", "Type" : "GEOMETRY,4326"}, {"Name" : "the_geom_webmercator", "Type" : "GEOMETRY,3857"}]
+f|remote_geom3|||||[{"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
+f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
+## Re-registering a table works
+R3|
+ERROR:  relation "cdb_fs_loopback.myFullTable" does not exist at character 49
+S3_new|3|patata
+## Unregistering works
+U1|
+ERROR:  relation "remote_geom" does not exist at character 71
+f|remote_geom|||||[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
+t|remote_geom2|cdb_fs_loopback.different_name|cartodb_id|the_geom_webmercator|the_geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "cartodb_id", "Type" : "bigint"}, {"Name" : "the_geom", "Type" : "GEOMETRY,4326"}, {"Name" : "the_geom_webmercator", "Type" : "GEOMETRY,3857"}]
+f|remote_geom3|||||[{"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
+f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
+## Registering a table: Invalid server fails
+ERROR:  Server "Does not exist" does not exist
+## Registering a table: NULL server fails
+ERROR:  Server name cannot be NULL
+## Registering a table: Invalid schema fails
+ERROR:  Could not import schema "Does not exist" of server "loopback": schema "Does not exist" is not present on foreign server "cdb_fs_loopback"
+## Registering a table: NULL schema fails
+ERROR:  Schema name cannot be NULL
+## Registering a table: Invalid table fails
+ERROR:  Could not import table "remote_schema.Does not exist" of server "loopback"
+## Registering a table: NULL table fails
+ERROR:  Remote table name cannot be NULL
+## Registering a table: Invalid id fails
+ERROR:  non integer id_column "Does not exist"
+## Registering a table: NULL id fails
+ERROR:  non integer id_column "<NULL>"
+## Registering a table: Invalid geom_column fails
+ERROR:  non geometry column "Does not exists"
+## Registering a table: NULL geom_column is OK: Reuses geom_mercator
+
+t|remote_geom|cdb_fs_loopback.remote_geom|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
+
+## Registering a table: Invalid webmercator_column fails
+ERROR:  non geometry column "Does not exists"
+## Registering a table: NULL webmercator_column is OK: Reuses geom
+
+t|remote_geom|cdb_fs_loopback.remote_geom|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
+
+##Registering a table with extra columns show the correct information
+
+t|remote_geom3|cdb_fs_loopback.remote_geom3|id|geom|geom_mercator|[{"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
+
+## Target conflict is handled nicely: Table
+CREATE TABLE
+ERROR:  Could not import table "remote_geom" as "cdb_fs_loopback.localtable" already exists
+## Target conflict is handled nicely: View
+CREATE VIEW
+ERROR:  Could not import table "remote_geom" as "cdb_fs_loopback.localtable2" already exists
+DROP VIEW
+DROP TABLE
+## Registering tables does not work without permissions
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+ERROR:  Not enough permissions to access the server "loopback"
+## Normal users can not write in the import schema
+ERROR:  permission denied for schema cdb_fs_loopback at character 14
+## Listing remote tables does not work without permissions
+ERROR:  Not enough permissions to access the server "loopback"
+## Registering tables works with granted permissions
+You are now connected to database "contrib_regression" as user "postgres".
+
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+
+## Listing remote tables works with granted permissions
+t|remote_geom|cdb_fs_loopback.localtable|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
+t|remote_geom2|cdb_fs_loopback.different_name|cartodb_id|the_geom_webmercator|the_geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "cartodb_id", "Type" : "bigint"}, {"Name" : "the_geom", "Type" : "GEOMETRY,4326"}, {"Name" : "the_geom_webmercator", "Type" : "GEOMETRY,3857"}]
+f|remote_geom3|||||[{"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
+f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
+## Selecting from a registered table with granted permissions works
+1|POINT(1 1)
+2|POINT(2 2)
+## Selecting from a registered table without permissions does not work
+You are now connected to database "contrib_regression" as user "cdb_fs_tester2".
+CREATE FUNCTION
+t
+DROP FUNCTION
+## Deleting a registered table without permissions does not work
+ERROR:  Not enough permissions to access the server "loopback"
+## Only the owner can grant permissions over the server
+ERROR:  You do not have rights to grant access on "loopback"
+## Everything works for a different user when granted permissions
+You are now connected to database "contrib_regression" as user "postgres".
+
+You are now connected to database "contrib_regression" as user "cdb_fs_tester2".
+t|remote_geom|cdb_fs_loopback.localtable|id|geom|geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
+t|remote_geom2|cdb_fs_loopback.different_name|cartodb_id|the_geom_webmercator|the_geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "cartodb_id", "Type" : "bigint"}, {"Name" : "the_geom", "Type" : "GEOMETRY,4326"}, {"Name" : "the_geom_webmercator", "Type" : "GEOMETRY,3857"}]
+f|remote_geom3|||||[{"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
+f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
+1|POINT(1 1)
+2|POINT(2 2)
+## A different user can unregister a table
+NOTICE:  drop cascades to view cdb_fs_loopback.localtable
+
+f|remote_geom|||||[{"Name" : "another_field", "Type" : "text"}, {"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "id", "Type" : "integer"}]
+t|remote_geom2|cdb_fs_loopback.different_name|cartodb_id|the_geom_webmercator|the_geom|[{"Name" : "another_field", "Type" : "text"}, {"Name" : "cartodb_id", "Type" : "bigint"}, {"Name" : "the_geom", "Type" : "GEOMETRY,4326"}, {"Name" : "the_geom_webmercator", "Type" : "GEOMETRY,3857"}]
+f|remote_geom3|||||[{"Name" : "geom", "Type" : "GEOMETRY,4326"}, {"Name" : "geom_mercator", "Type" : "GEOMETRY,3857"}, {"Name" : "id", "Type" : "bigint"}]
+f|remote_other|||||[{"Name" : "field", "Type" : "text"}, {"Name" : "field2", "Type" : "text"}, {"Name" : "id", "Type" : "bigint"}]
+## Only the owner can revoke permissions over the server
+ERROR:  You do not have rights to revoke access on "loopback"
+D1|

test/CDB_FederatedServer_expect

@@ -0,0 +1,69 @@
+## List empty servers shows nothing
+## List non-existent server shows nothing
+## Create and list a server works
+1.3|
+1.4|(myRemote,postgres_fdw,localhost,5432,,read-only,fdw_user)
+## Create and list a second server works
+2.1|
+2.2|(myRemote,postgres_fdw,localhost,5432,,read-only,fdw_user)
+2.2|(myRemote2,postgres_fdw,localhost,5432,fdw_target,read-only,fdw_user)
+## List server by name works
+2.3|(myRemote,postgres_fdw,localhost,5432,,read-only,fdw_user)
+## Re-register a second server works
+3.1|
+3.2|(myRemote,postgres_fdw,localhost,5432,,read-only,fdw_user)
+3.2|(myRemote2,postgres_fdw,localhost,5432,fdw_target,read-only,other_remote_user)
+## Unregister server 1 works
+4.1|
+4.2|(myRemote2,postgres_fdw,localhost,5432,fdw_target,read-only,other_remote_user)
+## Unregistering a server that does not exist fails
+ERROR:  Server "doesNotExist" does not exist
+## Unregister the second server works
+6.1|
+## Create a server with NULL name fails
+ERROR:  Server name cannot be NULL
+## Create a server with NULL config fails
+7.01|
+## Create a server with empty config fails
+ERROR:  Server information is mandatory
+## Create a server without credentials fails
+ERROR:  Credentials are mandatory
+## Create a server with empty credentials works
+7.3|
+7.4|(empty,postgres_fdw,localhost,5432,fdw_target,read-only,)
+7.5|
+## Create a server without options fails
+ERROR:  Server information is mandatory
+## Create a server with special characters works
+8.1|
+8.2|("myRemote"" or'not",postgres_fdw,localhost,5432,"fdw target",read-only,"fdw user")
+8.3|
+9.1|
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+## All users are able to list servers
+9.2|(myRemote3,postgres_fdw,localhost,5432,,read-only,)
+## Only superadmins can create servers
+ERROR:  Could not create server myRemote4: permission denied for foreign-data wrapper postgres_fdw
+You are now connected to database "contrib_regression" as user "postgres".
+## Granting access to a user works
+9.5|
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+9.55|(myRemote3,postgres_fdw,localhost,5432,,read-only,fdw_user)
+You are now connected to database "contrib_regression" as user "postgres".
+ERROR:  Server "does not exist" does not exist
+ERROR:  Could not grant access on "myRemote3" to "does not exist": role "does not exist" does not exist
+## Granting access again raises a notice
+NOTICE:  role "cdb_fs_tester" is already a member of role "cdb_fs_role_95b63382aabca4433e7bd9cba6c30368"
+9.8|
+## Revoking access to a user works
+9.9|
+9.10|
+## Unregistering a server with active grants works
+9.11|
+## A user with granted access can not drop a server
+10.1|
+10.2|
+You are now connected to database "contrib_regression" as user "cdb_fs_tester".
+ERROR:  Not enough permissions to drop the server "myRemote4"
+You are now connected to database "contrib_regression" as user "postgres".
+10.4|

test/CDB_GhostTables.sql

@@ -0,0 +1,102 @@
+-- Create user and enable Ghost tables trigger
+\set QUIET on
+SET client_min_messages TO error;
+
+-- Recreate the function without extra error messages as it changes depending on the python-redis version
+CREATE OR REPLACE FUNCTION cartodb._CDB_LinkGhostTables(username text, db_name text, event_name text)
+RETURNS void
+AS $$
+  if not username:
+    return
+
+  if 'json' not in GD:
+    import json
+    GD['json'] = json
+  else:
+    json = GD['json']
+
+  tis_config = plpy.execute("select cartodb.CDB_Conf_GetConf('invalidation_service');")[0]['cdb_conf_getconf']
+  if not tis_config:
+    plpy.warning('Invalidation service configuration not found. Skipping Ghost Tables linking.')
+    return
+
+  tis_config_dict = json.loads(tis_config)
+  tis_host = tis_config_dict.get('host')
+  tis_port = tis_config_dict.get('port')
+  tis_timeout = tis_config_dict.get('timeout', 5)
+  tis_retry = tis_config_dict.get('retry', 5)
+
+  client = GD.get('invalidation', None)
+
+  while True:
+
+    if not client:
+        try:
+          import redis
+          client = redis.Redis(host=tis_host, port=tis_port, socket_timeout=tis_timeout)
+          GD['invalidation'] = client
+        except Exception as err:
+          # NOTE: no retries on connection error
+          plpy.warning('Error trying to connect to Invalidation Service to link Ghost Tables')
+          break
+
+    try:
+      client.execute_command('DBSCH', db_name, username, event_name)
+      break
+    except Exception as err:
+      client = GD['invalidation'] = None # force reconnect
+      if not tis_retry:
+        plpy.warning('Error calling Invalidation Service to link Ghost Tables')
+        break
+      tis_retry -= 1 # try reconnecting
+$$ LANGUAGE '@@plpythonu@@' VOLATILE PARALLEL UNSAFE;
+
+SELECT CDB_EnableGhostTablesTrigger();
+CREATE ROLE "fulano" LOGIN;
+GRANT ALL ON SCHEMA cartodb TO "fulano";
+GRANT SELECT ON cartodb.cdb_ddl_execution TO "fulano";
+GRANT EXECUTE ON FUNCTION CDB_Username() TO "fulano";
+GRANT EXECUTE ON FUNCTION CDB_LinkGhostTables(text) TO "fulano";
+SELECT cartodb.CDB_Conf_SetConf('api_keys_fulano', '{"username": "fulanito", "permissions":[]}');
+DELETE FROM cdb_conf WHERE key = 'invalidation_service';
+SET SESSION AUTHORIZATION "fulano";
+SET client_min_messages TO notice;
+\set QUIET off
+
+SELECT CDB_LinkGhostTables(); -- _CDB_LinkGhostTables called (configuration not found)
+
+-- Add TIS configuration
+\set QUIET on
+SET SESSION AUTHORIZATION postgres;
+SELECT cartodb.CDB_Conf_SetConf('invalidation_service', '{"host": "fake-tis-host", "port": 3142}');
+SET SESSION AUTHORIZATION "fulano";
+\set QUIET off
+
+SELECT CDB_LinkGhostTables(); -- _CDB_LinkGhostTables called
+
+BEGIN;
+SELECT to_regclass('cartodb.cdb_ddl_execution'); -- exists
+SELECT COUNT(*) FROM cartodb.cdb_ddl_execution; -- 0
+CREATE TABLE tmp(id INT);
+SELECT COUNT(*) FROM cartodb.cdb_ddl_execution; -- 1
+END; -- _CDB_LinkGhostTables called
+
+-- Disable Ghost tables trigger
+\set QUIET on
+SET SESSION AUTHORIZATION postgres;
+SELECT CDB_DisableGhostTablesTrigger();
+SET SESSION AUTHORIZATION "fulano";
+\set QUIET off
+
+SELECT to_regclass('cartodb.cdb_ddl_execution'); -- not exists
+DROP TABLE tmp; -- _CDB_LinkGhostTables not called
+
+-- Cleanup
+\set QUIET on
+SET SESSION AUTHORIZATION postgres;
+REVOKE EXECUTE ON FUNCTION CDB_LinkGhostTables(text) FROM "fulano";
+REVOKE EXECUTE ON FUNCTION CDB_Username() FROM "fulano";
+REVOKE ALL ON SCHEMA cartodb FROM "fulano";
+DROP ROLE "fulano";
+DELETE FROM cdb_conf WHERE key = 'api_keys_fulano' OR key = 'invalidation_service';
+\set QUIET off

test/CDB_GhostTables_expect

@@ -0,0 +1,20 @@
+
+
+WARNING:  Invalidation service configuration not found. Skipping Ghost Tables linking.
+INFO:  _CDB_LinkGhostTables() called with username=fulanito, event_name=USER
+
+
+WARNING:  Error calling Invalidation Service to link Ghost Tables
+INFO:  _CDB_LinkGhostTables() called with username=fulanito, event_name=USER
+
+BEGIN
+cdb_ddl_execution
+0
+CREATE TABLE
+1
+WARNING:  Error calling Invalidation Service to link Ghost Tables
+INFO:  _CDB_LinkGhostTables() called with username=fulanito, event_name=CREATE TABLE
+COMMIT
+
+
+DROP TABLE

test/CDB_GreatCircle_expect

@@ -1,2 +1,2 @@
-LINESTRING(4.259 55.858,5.6692453115051 56.0150275120673,7.10720375678704 56.157400475677,8.5718366560563 56.2842986378254,10.0619272412891 56.3949153508462,11.5760785994189 56.4884642014437,13.1127142001617 56.564185934303,14.6700812655504 56.6213555706215,16.2462571744128 56.6592896061102,17.8391590143095 56.6773531596105,19.4465562981665 56.6749669334121,21.0660867567155 56.6516138405427,22.6952750058883 56.6068451534252,24.3315537765309 56.540286032869,25.9722872888145 56.4516403065472,27.6147962622065 56.3406943817481,29.2563839799455 56.207320197769,30.8943627796619 56.0514771479657,32.5260803224591 55.8732129290618,34.1489450028345 55.6726633044968,35.7604499005266 55.4500507979281,37.3581947399686 55.2056823610616,38.9399054089486 54.9399460854786,40.5034506895044 54.6533070499613,42.0468559644411 54.3463024122038,43.5683137754523 54.0195358662507,45.066191217402 53.673671594382,46.5390342525062 53.3094278446298,47.9855691138079 52.9275702630659,49.4047010366934 52.5289051040742,50.7955106088955 52.1142724327331,52.1572480633875 51.6845394219955,53.4893258557794 51.2405938343407,54.7913098701049 50.7833377637432,56.0629095865715 50.3136816997865,57.3039675245588 49.8325389621027,58.5144482465496 49.3408205404538,59.6944271762829 48.8394303639846,60.8440794494795 48.329261012675,61.9636689799149 47.811189874886,63.0535378889196 47.2860757471582,64.1140964137264 46.7547558660385,65.1458133802427 46.2180433565989,66.1492072992903 45.676725078361,67.1248381223566 45.131559846414,68.0732996734468 44.583277003498,68.9952127576034 44.0325753175597,69.8912189338183 43.4801221786776,70.7619749300985 42.9265530691612,71.6081476710291 42.3724712809595,72.4304098829428 41.8184478551838,73.2294362384225 41.2650217194684,74.0059 40.7127)
-LINESTRING(4.259 55.858,4.96060044865294 55.9382939511593,5.6692453115051 56.0150275120673,6.38482117645567 56.0880973218335,7.10720375678705 56.157400475677,7.83625773770865 56.2228347173136,8.5718366560563 56.2842986378254,9.31378281572326 56.3416918804739,10.0619272412891 56.3949153508462,10.8160896721679 56.4438714316548,11.5760785994189 56.4884642014437,12.3416913471456 56.528599656387,13.1127142001617 56.5641859343031,13.8889225793161 56.5951335399513,14.6700812655504 56.6213555706215,15.4559446734179 56.6427679409819,16.2462571744128 56.6592896061102,17.0407534700619 56.6708427815999,17.8391590143095 56.6773531596105,18.6411904842936 56.6787501197174,19.4465562981665 56.6749669334121,20.2549571781681 56.6659409611101,21.0660867567155 56.6516138405428,21.8796322228404 56.6319316654367,22.6952750058883 56.6068451534252,23.5126914929996 56.5763098021872,24.3315537765309 56.5402860328691,25.1515304272452 56.4987393199198,25.9722872888145 56.4516403065472,26.7934882889404 56.3989649050969,27.6147962622065 56.3406943817482,28.4358737796488 56.2768154250305,29.2563839799456 56.207320197769,30.0759913971174 56.1322063721813,30.8943627796619 56.0514771479657,31.7111678961496 55.9651412533344,32.5260803224592 55.8732129290618,33.3387782060384 55.7757118957345,34.1489450028345 55.6726633044969,34.9562701828379 55.5640976716962,35.7604499005266 55.4500507979282,36.5611876268714 55.3305636720814,37.3581947399687 55.2056823610617,38.1511910717861 55.0754578859583,38.9399054089486 54.9399460854787,39.7240759459355 54.7992074675415,40.5034506895044 54.6533070499613,41.277787813601 54.5023141912026,42.0468559644411 54.3463024122039,42.8104345158644 54.1853492102971,43.5683137754524 54.0195358662508,44.3202951422663 53.8489472454711,45.066191217402 53.6736715943821,45.8058258688602 53.4938003329924,46.5390342525062 53.3094278446299,47.2656627911282 53.1206512637978,47.985569113808 52.9275702630661,48.6986219579803 52.7302868398744,49.4047010366934 52.5289051040743,50.1036968736777 52.3235310669909,50.7955106088955 52.1142724327332,51.4800537772815 51.9012383924278,52.1572480633875 51.6845394219956,52.8270250346284 51.4642870840378,53.4893258557795 51.2405938343408,54.1441009873167 51.0135728334539,54.791309870105 50.7833377637434,55.4309205988438 50.5500026522693,56.0629095865715 50.3136816997866,56.6872612224038 50.0744891161178,57.3039675245588 49.8325389621028,57.9130277905821 49.5879449982851,58.5144482465496 49.3408205404539,59.1082416968843 49.091278322122,59.6944271762829 48.8394303639847,60.2730296051101 48.5853878503721,60.8440794494795 48.3292610126751,61.40761238711 48.0711590197009,61.9636689799149 47.8111898748862,62.5122943541616 47.5494603202768,63.0535378889195 47.2860757471584,63.5874529134047 47.0211401132109,64.1140964137264 46.7547558660387,64.6335287494427 46.4870238729191,65.1458133802426 46.2180433565991,65.6510166029904 45.9479118369597,66.1492072992903 45.6767250783612,66.6404566936622 45.4045770424768,67.1248381223566 45.1315598464143,67.6024268127789 44.8577637259253,68.0732996734467 44.5832770034983,68.5375350943572 44.3081860611283,68.9952127576034 44.0325753175599,69.4464134580461 43.7565272097974,69.8912189338183 43.4801221786779,70.3297117064144 43.2034386583077,70.7619749300985 42.9265530691615,71.1880922503468 42.6495398146493,71.6081476710291 42.3724712809597,72.0222254300221 42.0954178399905,72.4304098829428 41.8184478551841,72.8327853946822 41.5416276900883,73.2294362384225 41.2650217194687,73.6204465018146 40.9886923428039,74.0059 40.7127)
+LINESTRING(4.259 55.858,5.53349240387128 56.0006659105918,6.81698919498694 56.130094578525,8.10870381314147 56.2461317260662,9.40781156033233 56.3486370295466,10.7134527044527 56.4374849223869,12.0247359780093 56.5125653297878,13.3407424424749 56.573784325367,14.660529681225 56.6210647008095,15.9831362768927 56.654346440595,17.307586522649 56.67358709506,18.6328953115992 56.6787620464102,19.9580731443722 56.6698646638042,21.282131192215 56.6469063452276,22.6040863516019 56.6099164455407,23.922966226566 56.5589420917603,25.2378139766594 56.4940478882858,26.5476929715805 56.4153155163602,27.8516911979552 56.3228432335229,29.1489253693643 56.2167452801302,30.4385446972665 56.0971512011646,31.7197342877491 55.9642050924945,32.9917181368037 55.8180647814723,34.2537617048216 55.6589009522625,35.5051740589896 55.4868962265697,36.7453095800251 55.3022442104976,37.9735692370026 55.1051485181267,39.1894014407465 54.8958217820713,40.3923024922398 54.6744846607816,41.5818166476476 54.4413648517294,42.757535825811 54.1966961188706,43.919098987406 53.9407173419567,45.0661912174019 53.673671594382,46.198542544017 53.3958052553427,47.3159265281308 53.1073671611612,48.4181586571351 52.8086077997244,49.5050945765883 52.499778551104,50.5766281918714 52.1811309766006,51.6326896704254 51.8529161576737,52.673243373185 51.5153840855177,53.6982857415906 51.1687831014009,54.7078431641625 50.8133593873253,55.7019698441171 50.4493565060761,56.6807456869812 50.0770149893128,57.6442742246566 49.6965719720156,58.5926805899637 49.3082608713202,59.5261095533829 48.9123111075629,60.4447236315382 48.5089478652008,61.3487012749643 48.0983918911668,62.2382351408597 47.6808593281578,63.1135304548766 47.2565615803358,63.9748034645285 46.8257052089336,64.822279985501 46.3884918552974,65.6561940410346 45.9451181889661,66.476786593589 45.4957758784676,67.284304367196 45.0406515826125,68.0789987582454 44.5799269601738,68.8611248319107 44.1137786959568,69.6309404010034 43.6423785413868,70.388705183725 43.1658933678633,71.1346800365587 42.6844852312539,71.8691262583921 42.1983114460249,72.5923049618788 41.7075246676227,73.3044765080245 41.2122729818388,74.0059 40.7127)
+LINESTRING(4.259 55.858,4.89507305967085 55.930977446384,5.53349240387128 56.0006659105918,6.17416348361598 56.0670448594645,6.81698919498694 56.130094578525,7.46186995983655 56.1897961993418,8.10870381314147 56.2461317260662,8.75738649688733 56.2990840610623,9.40781156033233 56.3486370295466,10.0598704664666 56.3947754031591,10.7134527044527 56.4374849223869,11.3684459078018 56.4767523177655,12.0247359780093 56.5125653297878,12.6822072133468 56.5449127274491,13.3407424424749 56.573784325367,14.0002231625192 56.5991709994144,14.660529681225 56.6210647008095,15.3215412627822 56.6394584686143,15.9831362768927 56.654346440595,16.6451923506331 56.6657238624055,17.307586522649 56.67358709506,17.9701953992046 56.677933620668,18.6328953115992 56.6787620464102,19.2955624744544 56.6760721067401,19.9580731443722 56.6698646638042,20.6203037784591 56.6601417060788,21.282131192215 56.6469063452276,21.943432716288 56.6301628111935,22.6040863516019 56.6099164455407,23.2639709223762 56.5861736930735,23.922966226566 56.5589420917603,24.5809531832687 56.5282302610022,25.2378139766594 56.4940478882858,25.8934321960358 56.4564057142701,26.5476929715805 56.4153155163602,27.2004831054654 56.3707900908252,27.8516911979552 56.3228432335229,28.5012077681911 56.2714897192993,29.1489253693643 56.2167452801302,29.7947386980206 56.1586265820819,30.4385446972665 56.0971512011646,31.0802426536785 56.0323375981587,31.7197342877491 55.9642050924945,32.3569238377352 55.8927738352675,32.9917181368037 55.8180647814723,33.6240266834038 55.74009966154,34.2537617048216 55.6589009522625,34.8808382139074 55.5744918471876,35.5051740589896 55.4868962265697,36.1266899670207 55.3961386269571,36.7453095800251 55.3022442104976,37.3609594849451 55.2052387340427,37.9735692370026 55.1051485181267,38.5830713767178 55.0020004158976,39.1894014407465 54.8958217820713,39.7924979667135 54.7866404419798,40.3923024922398 54.6744846607816,40.9887595483734 54.5593831128969,41.5818166476476 54.4413648517294,42.1714242670021 54.3204592797319,42.757535825811 54.1966961188706,43.3401076592708 54.0701053815371,43.919098987406 53.9407173419567,44.4944718799548 53.8085625081347,45.0661912174019 53.673671594382,45.6342246484243 53.5360754944551,46.198542544017 53.3958052553427,46.7591179485663 53.2528920517295,47.3159265281308 53.1073671611612,47.8689465161932 52.9592619399335,48.4181586571351 52.8086077997244,48.9635461476859 52.6554361849853,49.5050945765883 52.499778551104,50.0427918627159 52.3416663433486,50.5766281918714 52.1811309766006,51.1065959524853 52.0182038158815,51.6326896704254 51.8529161576737,52.1549059431199 51.6852992120372,52.673243373185 51.5153840855177,53.1877025017413 51.3432017648431,53.6982857415906 51.1687831014009,54.2049973104167 50.9921587964881,54.7078431641625 50.8133593873253,55.2068309307272 50.6324152338211,55.7019698441171 50.4493565060761,56.1932706791714 50.2642131726125,56.6807456869812 50.0770149893128,57.1644085311015 49.8877914890534,57.6442742246566 49.6965719720156,58.1203590684218 49.5033854966561,58.5926805899637 49.3082608713202,59.0612574839055 49.1112266464775,59.5261095533829 48.9123111075629,59.9872576527434 48.7115422684016,60.4447236315382 48.5089478652008,60.8985302798459 48.3045553510865,61.3487012749643 48.0983918911668,61.7952611294973 47.8904843581013,62.2382351408597 47.6808593281578,62.6776493422177 47.4695430777354,63.1135304548766 47.2565615803358,63.5459058421237 47.0419405039633,63.9748034645285 46.8257052089336,64.4002518367009 46.6078807460742,64.822279985501 46.3884918552974,65.2409174096934 46.1675629645276,65.6561940410346 45.9451181889661,66.0681402067793 45.7211813306754,66.476786593589 45.4957758784676,66.8821642128236 45.2689250080781,67.284304367196 45.0406515826125,67.6832386187654 44.8109781532476,68.0789987582454 44.5799269601738,68.4716167756018 44.3475199337644,68.8611248319107 44.1137786959568,69.2475552324516 43.878724561833,69.6309404010034 43.6423785413868,70.0113128553159 43.4047613414637,70.388705183725 43.1658933678633,70.7631500228809 42.925794727592,71.1346800365587 42.6844852312539,71.5033278955199 42.4419843955718,71.8691262583921 42.1983114460249,72.2321077535378 41.953485319597,72.5923049618788 41.7075246676227,72.9497504006463 41.4604478587259,73.3044765080245 41.2122729818388,73.6565156286596 40.963017849297,74.0059 40.7127)

test/CDB_HeadsTailsBinsTest.sql

@@ -1,5 +1,11 @@
 WITH data AS (
-    SELECT array_agg(x) x FROM generate_series(1,100) x 
+    SELECT array_agg(x::numeric) s FROM generate_series(1,100) x
         WHERE x % 5 != 0 AND x % 7 != 0
-    ) 
-SELECT round(unnest(CDB_HeadsTailsBins(x, 7)),2) FROM data
+    )
+SELECT round(unnest(CDB_HeadsTailsBins(s, 7)),2) FROM data;
+
+WITH data_nulls AS (
+    SELECT array_agg(CASE WHEN x % 2 != 0 THEN x ELSE NULL END::numeric) s FROM generate_series(1,100) x
+        WHERE x % 5 != 0 AND x % 7 != 0
+    )
+SELECT round(unnest(CDB_HeadsTailsBins(s, 7)),2) FROM data_nulls;

test/CDB_HeadsTailsBinsTest_expect

@@ -5,3 +5,9 @@
 96.50
 98.00
 99.00
+49.76
+74.65
+88.50
+94.50
+98.00
+99.00

test/CDB_HelperTest.sql

@@ -14,17 +14,17 @@ SELECT * FROM cartodb._CDB_Unique_Identifier(NULL, 'largolargolargolargolargolar
 SELECT * FROM cartodb._CDB_Unique_Identifier('prefix_', 'largolargolargolargolargolargolargolargolargolargolargolargolar', NULL);
 
 -- Test new identifier is found when name is taken from previous case
-CREATE TABLE prefix_largolargolargolargolargolargolargolargolargolargolar (name text);
+CREATE TABLE prefix_largolargolargolargolargolargolargolargolargolargola (name text);
 SELECT * FROM cartodb._CDB_Unique_Identifier('prefix_', 'largolargolargolargolargolargolargolargolargolargolargolargolar', NULL);
-DROP TABLE prefix_largolargolargolargolargolargolargolargolargolargolar;
+DROP TABLE prefix_largolargolargolargolargolargolargolargolargolargola;
 
 -- Test unique identifier creation with suffix with long length normal relname
 SELECT * FROM cartodb._CDB_Unique_Identifier(NULL, 'largolargolargolargolargolargolargolargolargolargolargolargolar', '_suffix');
 
 -- Test new identifier is found when name is taken from previous case
-CREATE TABLE largolargolargolargolargolargolargolargolargolargolar_suffix (name text);
+CREATE TABLE largolargolargolargolargolargolargolargolargolargola_suffix (name text);
 SELECT * FROM cartodb._CDB_Unique_Identifier(NULL, 'largolargolargolargolargolargolargolargolargolargolargolargolar', '_suffix');
-DROP TABLE largolargolargolargolargolargolargolargolargolargolar_suffix;
+DROP TABLE largolargolargolargolargolargolargolargolargolargola_suffix;
 
 -- Test unique identifier creation with normal length UTF8 relname
 SELECT * FROM cartodb._CDB_Unique_Identifier(NULL, 'piraña', NULL);
@@ -72,7 +72,7 @@ SELECT * FROM cartodb._CDB_Unique_Column_Identifier('prefix_', 'largolargolargol
 DROP TABLE test;
 
 -- Test new identifier is found when name is taken from previous case
-CREATE TABLE test (prefix_largolargolargolargolargolargolargolargolargolargolar text);
+CREATE TABLE test (prefix_largolargolargolargolargolargolargolargolargolargola text);
 SELECT * FROM cartodb._CDB_Unique_Column_Identifier('prefix_', 'largolargolargolargolargolargolargolargolargolargolargolargolar', NULL, 'test'::regclass);
 DROP TABLE test;
 
@@ -82,7 +82,7 @@ SELECT * FROM cartodb._CDB_Unique_Column_Identifier(NULL, 'largolargolargolargol
 DROP TABLE test;
 
 -- Test new identifier is found when name is taken from previous case
-CREATE TABLE test (largolargolargolargolargolargolargolargolargolargolar_suffix text);
+CREATE TABLE test (largolargolargolargolargolargolargolargolargolargola_suffix text);
 SELECT * FROM cartodb._CDB_Unique_Column_Identifier(NULL, 'largolargolargolargolargolargolargolargolargolargolargolargolar', '_suffix', 'test'::regclass);
 DROP TABLE test;
 
@@ -126,3 +126,13 @@ SELECT * FROM cartodb._CDB_Octet_Truncate('piraña', 6);
 
 -- Test _CDB_Octet_Truncate UTF8 case
 SELECT * FROM cartodb._CDB_Octet_Truncate('piraña', 7);
+
+-- Test _CDB_Table_Exists
+CREATE TABLE public.this_table_exists();
+SELECT cartodb._CDB_Table_Exists('this_table_does_not_exist');
+SELECT cartodb._CDB_Table_Exists('this_schema_does_not_exist.this_table_does_not_exist');
+SELECT cartodb._CDB_Table_Exists('this_table_exists');
+SELECT cartodb._CDB_Table_Exists('public.this_table_exists');
+SELECT cartodb._CDB_Table_Exists('raster_overviews'); -- view created by postgis
+SELECT cartodb._CDB_Table_Exists('public.raster_overviews');
+DROP TABLE public.this_table_exists

test/CDB_HelperTest_expect

@@ -1,59 +1,67 @@
 relname
 prefix_relname
 relname_suffix
-largolargolargolargolargolargolargolargolargolargolargolargo
-prefix_largolargolargolargolargolargolargolargolargolargolar
+largolargolargolargolargolargolargolargolargolargolargolarg
+prefix_largolargolargolargolargolargolargolargolargolargola
 CREATE TABLE
-prefix_largolargolargolargolargolargolargolargolargolargolar_0
+prefix_largolargolargolargolargolargolargolargolargolargola0
 DROP TABLE
-largolargolargolargolargolargolargolargolargolargolar_suffix
+largolargolargolargolargolargolargolargolargolargola_suffix
 CREATE TABLE
-largolargolargolargolargolargolargolargolargolargolar_suffix_0
+largolargolargolargolargolargolargolargolargolargola_suffix0
 DROP TABLE
 piraña
 prefix_piraña
 piraña_suffix
-piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpiñaácid
+piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpiñaáci
 prefix_piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi
 CREATE TABLE
-prefix_piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi_0
+prefix_piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi0
 DROP TABLE
 piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi_suffix
 CREATE TABLE
-piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi_suffix_0
+piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi_suffix0
 DROP TABLE
 CREATE TABLE
 colname
 prefix_colname
 colname_suffix
-largolargolargolargolargolargolargolargolargolargolargolargo
-prefix_largolargolargolargolargolargolargolargolargolargolar
+largolargolargolargolargolargolargolargolargolargolargolarg
+prefix_largolargolargolargolargolargolargolargolargolargola
 DROP TABLE
 CREATE TABLE
-prefix_largolargolargolargolargolargolargolargolargolargolar_0
+prefix_largolargolargolargolargolargolargolargolargolargola0
 DROP TABLE
 CREATE TABLE
-largolargolargolargolargolargolargolargolargolargolar_suffix
+largolargolargolargolargolargolargolargolargolargola_suffix
 DROP TABLE
 CREATE TABLE
-largolargolargolargolargolargolargolargolargolargolar_suffix_0
+largolargolargolargolargolargolargolargolargolargola_suffix0
 DROP TABLE
 CREATE TABLE
 piraña
 prefix_piraña
 piraña_suffix
-piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpiñaácid
+piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpiñaáci
 prefix_piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi
 DROP TABLE
 CREATE TABLE
-prefix_piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi_0
+prefix_piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi0
 DROP TABLE
 CREATE TABLE
 piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi_suffix
 DROP TABLE
 CREATE TABLE
-piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi_suffix_0
+piñaácidpiñaácidpiñaácidpiñaácidpiñaácidpi_suffix0
 DROP TABLE
 pira
 pirañ
 piraña
+CREATE TABLE
+f
+f
+t
+t
+f
+f
+DROP TABLE

test/CDB_HexagonTest.sql

@@ -1,3 +1,6 @@
+set client_min_messages to error;
+\set VERBOSITY TERSE
+
 -- Check correctness of an hexagons grid
 --
 -- Cells must have no overlaps and have a number of
@@ -45,3 +48,9 @@ WITH
  0.002 as radius ),
  grid AS ( SELECT CDB_HexagonGrid(env, radius) AS cell from params)
 SELECT '#160', count(cell) > 23000 from grid;
+
+-- Check small grids are generated...
+SELECT COUNT(*) FROM cartodb.CDB_HexagonGrid(ST_MakeEnvelope(0,0,1000,1000,3857), 10);
+
+-- But large grids produce an error
+SELECT COUNT(*) FROM cartodb.CDB_HexagonGrid(ST_MakeEnvelope(0,0,1000,1000,3857), 1);