diff --git a/Makefile b/Makefile
index 330033f..6afa010 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # cartodb/Makefile
 
 EXTENSION = cartodb
-EXTVERSION = 0.27.2
+EXTVERSION = 0.28.0
 
 SED = sed
 AWK = awk
@@ -99,6 +99,7 @@ UPGRADABLE = \
   0.27.0 \
   0.27.1 \
   0.27.2 \
+  0.28.0 \
   $(EXTVERSION)dev \
   $(EXTVERSION)next \
   $(END)
diff --git a/NEWS.md b/NEWS.md
index 10e9aef..8461371 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,6 @@
+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)
 
diff --git a/doc/CDB_SyncTable.md b/doc/CDB_SyncTable.md
new file mode 100644
index 0000000..9447dd0
--- /dev/null
+++ b/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
diff --git a/scripts-available/CDB_SyncTable.sql b/scripts-available/CDB_SyncTable.sql
index c4e49ca..d7dd14f 100644
--- a/scripts-available/CDB_SyncTable.sql
+++ b/scripts-available/CDB_SyncTable.sql
@@ -3,9 +3,9 @@
 
    Sample usage:
 
-     SELECT cartodb._CDB_GetColumns('public.films');
+     SELECT @extschema@._CDB_GetColumns('public.films');
 */
-CREATE OR REPLACE FUNCTION cartodb._CDB_GetColumns(src_table REGCLASS)
+CREATE OR REPLACE FUNCTION @extschema@._CDB_GetColumns(src_table REGCLASS)
 RETURNS SETOF NAME
 AS $$
   SELECT
@@ -35,9 +35,9 @@ $$ LANGUAGE sql STABLE PARALLEL UNSAFE;
 
     Example of usage:
 
-       SELECT cartodb.__CDB_GetUpdateSetClause('{the_geom, id, elevation}', 'changed');
+       SELECT @extschema@.__CDB_GetUpdateSetClause('{the_geom, id, elevation}', 'changed');
 */
-CREATE OR REPLACE FUNCTION cartodb.__CDB_GetUpdateSetClause(colnames TEXT[], update_source TEXT)
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_GetUpdateSetClause(colnames TEXT[], update_source TEXT)
 RETURNS TEXT
 AS $$
 DECLARE
@@ -58,10 +58,10 @@ $$ LANGUAGE plpgsql IMMUTABLE PARALLEL SAFE;
 
     Example of usage:
 
-       SELECT cartodb.__CDB_GenerateUniqueName('src_sync'); --> src_sync_718794_120106
+       SELECT @extschema@.__CDB_GenerateUniqueName('src_sync'); --> src_sync_718794_120106
 
 */
-CREATE OR REPLACE FUNCTION cartodb.__CDB_GenerateUniqueName(prefix TEXT)
+CREATE OR REPLACE FUNCTION @extschema@.__CDB_GenerateUniqueName(prefix TEXT)
 RETURNS NAME
 AS $$
   SELECT format('%s_%s_%s', prefix, txid_current(), (random()*1000000)::int)::NAME;
@@ -90,11 +90,11 @@ $$ LANGUAGE sql IMMUTABLE PARALLEL SAFE;
 
    Sample usage:
 
-     SELECT cartodb.CDB_SyncTable('radar_stations', 'public', 'syncdest');
-     SELECT cartodb.CDB_SyncTable('test_sync_source', 'public', 'test_sync_dest', '{the_geom, the_geom_webmercator}');
+     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 cartodb.CDB_SyncTable(src_table REGCLASS, dst_schema REGNAMESPACE, dst_table NAME, skip_cols NAME[] = '{}')
+CREATE OR REPLACE FUNCTION @extschema@.CDB_SyncTable(src_table REGCLASS, dst_schema REGNAMESPACE, dst_table NAME, skip_cols NAME[] = '{}')
 RETURNS void
 AS $$
 DECLARE
@@ -126,7 +126,7 @@ BEGIN
   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 cartodb._CDB_GetColumns(src_table) as c EXCEPT SELECT unnest(skip_cols)) INTO colnames;
+  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();
@@ -149,7 +149,7 @@ BEGIN
 
   -- Deal with modified rows: ids in source and dest but different hashes
   t := clock_timestamp();
-  update_set_clause := cartodb.__CDB_GetUpdateSetClause(colnames, '_changed');
+  update_set_clause :=  @extschema@.__CDB_GetUpdateSetClause(colnames, '_changed');
   dst_colnames := array_to_string(cartodb.__CDB_QualifyColumns('_dst', colnames), ',');
   src_colnames := array_to_string(cartodb.__CDB_QualifyColumns('_src', colnames), ',');
   EXECUTE format('