diff --git a/scripts-available/CDB_Overviews.sql b/scripts-available/CDB_Overviews.sql
index c1520f2..27743f1 100644
--- a/scripts-available/CDB_Overviews.sql
+++ b/scripts-available/CDB_Overviews.sql
@@ -1,175 +1,3 @@
--- Maximum zoom level for which overviews may be created
-CREATE OR REPLACE FUNCTION _CDB_MaxOverviewLevel()
-RETURNS INTEGER
-AS $$
-  BEGIN
-    -- Zoom level will be limited so that both tile coordinates
-    -- and gridding coordinates within a tile up to 1px
-    -- (i.e. tile coordinates / 256)
-    -- can be stored in a 32-bit signed integer.
-    -- We have 31 bits por positive numbers
-    -- For zoom level Z coordinates range from 0 to 2^Z-1, so they
-    -- need Z bits, and need 8 bits more to address pixels within a tile
-    -- (gridding), so we'll limit Z to a maximum of 31 - 8
-    RETURN 23;
-  END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
-
--- Maximum zoom level usable with integer coordinates
-CREATE OR REPLACE FUNCTION _CDB_MaxZoomLevel()
-RETURNS INTEGER
-AS $$
-  BEGIN
-    RETURN 31;
-  END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
-
--- 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)
-RETURNS TABLE(table_regclass REGCLASS, schema_name TEXT, table_name TEXT)
-AS $$
-  SELECT
-    c.oid::regclass AS table_regclass,
-    n.nspname::text AS schema_name,
-    c.relname::text AS table_relname
-  FROM pg_class c
-  JOIN pg_namespace n ON n.oid = c.relnamespace
-  WHERE c.relkind = 'r'
-  AND c.relname NOT IN ('cdb_tablemetadata', 'spatial_ref_sys')
-  AND CASE WHEN schema_name IS NULL
-             THEN n.nspname NOT IN ('pg_catalog', 'information_schema', 'topology', 'cartodb')
-           ELSE n.nspname = schema_name
-           END;
-$$ LANGUAGE 'sql';
-
--- 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()
-RETURNS TEXT
-AS $$
-  BEGIN
-    RETURN '\A_vovw_(\d+)_';
-  END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
--- 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)
-RETURNS TEXT
-AS $$
-  BEGIN
-    RETURN _CDB_OverviewTableDiscriminator() || base_table;
-  END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
--- 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)
-RETURNS TEXT
-AS $$
-  BEGIN
-    RETURN '_vovw_' || z::text || '_' || base_table;
-  END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
-
--- 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)
-RETURNS BOOLEAN
-AS $$
-  BEGIN
-    RETURN otable SIMILAR TO _CDB_OverviewTablePattern(base_table);
-  END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
-
--- Extract the Z level from an overview table name
--- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_OverviewTableZ(otable TEXT)
-RETURNS INTEGER
-AS $$
-  BEGIN
-    RETURN substring(otable from _CDB_OverviewTableDiscriminator())::integer;
-  END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
-
--- Name of the base table corresponding to an overview table
--- Scope: private.
-CREATE OR REPLACE FUNCTION _CDB_OverviewBaseTableName(overview_table TEXT)
-RETURNS TEXT
-AS $$
-  BEGIN
-    IF _CDB_OverviewTableZ(overview_table) IS NULL THEN
-      RETURN overview_table;
-    ELSE
-      RETURN regexp_replace(overview_table, _CDB_OverviewTableDiscriminator(), '');
-    END IF;
-  END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
-
-CREATE OR REPLACE FUNCTION _CDB_OverviewBaseTable(overview_table REGCLASS)
-RETURNS REGCLASS
-AS $$
-  DECLARE
-    table_name TEXT;
-    schema_name TEXT;
-    base_name TEXT;
-    base_table REGCLASS;
-  BEGIN
-    SELECT * FROM _cdb_split_table_name(overview_table) INTO schema_name, table_name;
-    base_name := _CDB_OverviewBaseTableName(table_name);
-    IF base_name != table_name THEN
-      base_table := Format('%I.%I', schema_name, base_name)::regclass;
-    ELSE
-      base_table := overview_table;
-    END IF;
-    RETURN base_table;
-  END;
-$$ LANGUAGE PLPGSQL IMMUTABLE;
-
--- Schema and relation names of a table given its reloid
--- Scope: private.
--- Parameters
---   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)
-AS $$
-  BEGIN
-    SELECT n.nspname, c.relname
-    INTO STRICT schema_name, table_name
-    FROM pg_class c JOIN pg_namespace n ON c.relnamespace = n.oid
-    WHERE c.oid = reloid;
-  END
-$$ LANGUAGE PLPGSQL IMMUTABLE;
-
--- Schema and relation names of a table given its reloid
--- Scope: private.
--- Parameters
---   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)
-RETURNS TEXT
-AS $$
-  DECLARE
-    schema_name TEXT;
-  BEGIN
-    SELECT n.nspname
-    INTO STRICT schema_name
-    FROM pg_class c JOIN pg_namespace n ON c.relnamespace = n.oid
-    WHERE c.oid = reloid;
-    RETURN schema_name;
-  END
-$$ LANGUAGE PLPGSQL IMMUTABLE;
-
 -- Remove a dataset's existing  overview tables.
 -- Scope: public
 -- Parameters:
diff --git a/scripts-available/CDB_OverviewsSupport.sql b/scripts-available/CDB_OverviewsSupport.sql
new file mode 100644
index 0000000..78bcb84
--- /dev/null
+++ b/scripts-available/CDB_OverviewsSupport.sql
@@ -0,0 +1,173 @@
+-- Auxiliary overviews FUNCTIONS
+
+-- Maximum zoom level for which overviews may be created
+CREATE OR REPLACE FUNCTION _CDB_MaxOverviewLevel()
+RETURNS INTEGER
+AS $$
+  BEGIN
+    -- Zoom level will be limited so that both tile coordinates
+    -- and gridding coordinates within a tile up to 1px
+    -- (i.e. tile coordinates / 256)
+    -- can be stored in a 32-bit signed integer.
+    -- We have 31 bits por positive numbers
+    -- For zoom level Z coordinates range from 0 to 2^Z-1, so they
+    -- need Z bits, and need 8 bits more to address pixels within a tile
+    -- (gridding), so we'll limit Z to a maximum of 31 - 8
+    RETURN 23;
+  END;
+$$ LANGUAGE PLPGSQL IMMUTABLE;
+
+-- Maximum zoom level usable with integer coordinates
+CREATE OR REPLACE FUNCTION _CDB_MaxZoomLevel()
+RETURNS INTEGER
+AS $$
+  BEGIN
+    RETURN 31;
+  END;
+$$ LANGUAGE PLPGSQL IMMUTABLE;
+
+-- 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)
+RETURNS TABLE(table_regclass REGCLASS, schema_name TEXT, table_name TEXT)
+AS $$
+  SELECT
+    c.oid::regclass AS table_regclass,
+    n.nspname::text AS schema_name,
+    c.relname::text AS table_relname
+  FROM pg_class c
+  JOIN pg_namespace n ON n.oid = c.relnamespace
+  WHERE c.relkind = 'r'
+  AND c.relname NOT IN ('cdb_tablemetadata', 'spatial_ref_sys')
+  AND CASE WHEN schema_name IS NULL
+             THEN n.nspname NOT IN ('pg_catalog', 'information_schema', 'topology', 'cartodb')
+           ELSE n.nspname = schema_name
+           END;
+$$ LANGUAGE 'sql';
+
+-- 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()
+RETURNS TEXT
+AS $$
+  BEGIN
+    RETURN '\A_vovw_(\d+)_';
+  END;
+$$ LANGUAGE PLPGSQL IMMUTABLE;
+-- 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)
+RETURNS TEXT
+AS $$
+  BEGIN
+    RETURN _CDB_OverviewTableDiscriminator() || base_table;
+  END;
+$$ LANGUAGE PLPGSQL IMMUTABLE;
+-- 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)
+RETURNS TEXT
+AS $$
+  BEGIN
+    RETURN '_vovw_' || z::text || '_' || base_table;
+  END;
+$$ LANGUAGE PLPGSQL IMMUTABLE;
+
+-- 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)
+RETURNS BOOLEAN
+AS $$
+  BEGIN
+    RETURN otable SIMILAR TO _CDB_OverviewTablePattern(base_table);
+  END;
+$$ LANGUAGE PLPGSQL IMMUTABLE;
+
+-- Extract the Z level from an overview table name
+-- Scope: private.
+CREATE OR REPLACE FUNCTION _CDB_OverviewTableZ(otable TEXT)
+RETURNS INTEGER
+AS $$
+  BEGIN
+    RETURN substring(otable from _CDB_OverviewTableDiscriminator())::integer;
+  END;
+$$ LANGUAGE PLPGSQL IMMUTABLE;
+
+-- Name of the base table corresponding to an overview table
+-- Scope: private.
+CREATE OR REPLACE FUNCTION _CDB_OverviewBaseTableName(overview_table TEXT)
+RETURNS TEXT
+AS $$
+  BEGIN
+    IF _CDB_OverviewTableZ(overview_table) IS NULL THEN
+      RETURN overview_table;
+    ELSE
+      RETURN regexp_replace(overview_table, _CDB_OverviewTableDiscriminator(), '');
+    END IF;
+  END;
+$$ LANGUAGE PLPGSQL IMMUTABLE;
+
+CREATE OR REPLACE FUNCTION _CDB_OverviewBaseTable(overview_table REGCLASS)
+RETURNS REGCLASS
+AS $$
+  DECLARE
+    table_name TEXT;
+    schema_name TEXT;
+    base_name TEXT;
+    base_table REGCLASS;
+  BEGIN
+    SELECT * FROM _cdb_split_table_name(overview_table) INTO schema_name, table_name;
+    base_name := _CDB_OverviewBaseTableName(table_name);
+    IF base_name != table_name THEN
+      base_table := Format('%I.%I', schema_name, base_name)::regclass;
+    ELSE
+      base_table := overview_table;
+    END IF;
+    RETURN base_table;
+  END;
+$$ LANGUAGE PLPGSQL IMMUTABLE;
+
+-- Schema and relation names of a table given its reloid
+-- Scope: private.
+-- Parameters
+--   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)
+AS $$
+  BEGIN
+    SELECT n.nspname, c.relname
+    INTO STRICT schema_name, table_name
+    FROM pg_class c JOIN pg_namespace n ON c.relnamespace = n.oid
+    WHERE c.oid = reloid;
+  END
+$$ LANGUAGE PLPGSQL IMMUTABLE;
+
+-- Schema and relation names of a table given its reloid
+-- Scope: private.
+-- Parameters
+--   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)
+RETURNS TEXT
+AS $$
+  DECLARE
+    schema_name TEXT;
+  BEGIN
+    SELECT n.nspname
+    INTO STRICT schema_name
+    FROM pg_class c JOIN pg_namespace n ON c.relnamespace = n.oid
+    WHERE c.oid = reloid;
+    RETURN schema_name;
+  END
+$$ LANGUAGE PLPGSQL IMMUTABLE;
diff --git a/scripts-available/CDB_Quota.sql b/scripts-available/CDB_Quota.sql
index 77f9df5..0f70d1e 100644
--- a/scripts-available/CDB_Quota.sql
+++ b/scripts-available/CDB_Quota.sql
@@ -35,7 +35,9 @@ BEGIN
   table_cat AS (
     SELECT
       table_name,
-      EXISTS(select * from raster_tables where o_table_name = table_name) AS is_overview,
+      EXISTS(select * from raster_tables where o_table_name = table_name)
+      OR table_name SIMILAR TO _CDB_OverviewTableDiscriminator() || '[\w\d]*'
+      AS is_overview,
       EXISTS(SELECT * FROM raster_tables WHERE r_table_name = table_name) AS is_raster
     FROM user_tables
   ),
diff --git a/scripts-enabled/085-CDB_OverviewsSupport.sql b/scripts-enabled/085-CDB_OverviewsSupport.sql
new file mode 120000
index 0000000..571319b
--- /dev/null
+++ b/scripts-enabled/085-CDB_OverviewsSupport.sql
@@ -0,0 +1 @@
+../scripts-available/CDB_OverviewsSupport.sql
\ No newline at end of file
diff --git a/scripts-enabled/242-CDB_Overviews.sql b/scripts-enabled/245-CDB_Overviews.sql
similarity index 100%
rename from scripts-enabled/242-CDB_Overviews.sql
rename to scripts-enabled/245-CDB_Overviews.sql
diff --git a/test/extension/run_at_cartodb_schema.sql b/test/extension/run_at_cartodb_schema.sql
index 1637d43..662626b 100644
--- a/test/extension/run_at_cartodb_schema.sql
+++ b/test/extension/run_at_cartodb_schema.sql
@@ -4,4 +4,4 @@ SET SCHEMA 'cartodb';
 \i scripts-available/CDB_ColumnNames.sql
 \i scripts-available/CDB_ColumnType.sql
 \i scripts-available/CDB_AnalysisCatalog.sql
-SET SCHEMA 'public';
\ No newline at end of file
+SET SCHEMA 'public';
diff --git a/test/extension/test.sh b/test/extension/test.sh
index 410ac12..a8807ef 100755
--- a/test/extension/test.sh
+++ b/test/extension/test.sh
@@ -181,6 +181,7 @@ function setup_database() {
 
     log_info "########################### BOOTSTRAP ###########################"
     ${CMD} -d ${DATABASE} -f scripts-available/CDB_Organizations.sql
+    ${CMD} -d ${DATABASE} -f scripts-available/CDB_OverviewsSupport.sql
     # trick to allow forcing a schema when loading SQL files (see: http://bit.ly/1HeLnhL)
     ${CMD} -d ${DATABASE} -f test/extension/run_at_cartodb_schema.sql
 }