Merge branch 'new_querytables_library' into analysis-layers

test/support/sql/_CDB_QueryStatements.sql

@@ -0,0 +1,16 @@
+-- DUMMY IMPLEMENTATION
+-- Ref: https://github.com/CartoDB/cartodb-postgresql/blob/master/scripts-available/CDB_QueryStatements.sql
+-- Originally implemented in plpython for performance reasons
+
+-- Return an array of statements found in the given query text
+--
+-- Regexp curtesy of Hubert Lubaczewski (depesz)
+--
+CREATE OR REPLACE FUNCTION CDB_QueryStatements(query text)
+RETURNS SETOF TEXT AS $$
+  with matches as (
+    select regexp_matches($1, $regexp$((?:[^'"$;]+|"[^"]*"|'[^']*'|(\$[^$]*\$).*?\2)+)$regexp$, 'g') as m
+  )
+  select btrim(m[1]) from matches
+$$
+LANGUAGE SQL IMMUTABLE STRICT;