Merge pull request #3495 from citusdata/fix-information-schema-join

Add test for issue 2717, does not reproduce issue

src/test/regress/expected/subquery_local_tables.out

@@ -242,8 +242,25 @@ DEBUG:  Plan XXX query after replacing subqueries and CTEs: SELECT user_id FROM
 (2 rows)
 
 SET client_min_messages TO DEFAULT;
+-- Test https://github.com/citusdata/citus/issues/2717
+create table test_dist (id int, table_name text, column_name text);
+select create_distributed_table('test_dist','id');
+ create_distributed_table
+---------------------------------------------------------------------
+
+(1 row)
+
+insert into test_dist values (1, 'test_dist', 'table_name');
+with q as (
+    select icl.* from test_dist td
+    join information_schema.columns icl on icl.table_name::text = lower(td.table_name) and icl.column_name::text = lower(td.column_name)
+) select column_name from q;
+ column_name
+---------------------------------------------------------------------
+ table_name
+(1 row)
+
+\set VERBOSITY terse
 DROP SCHEMA subquery_local_tables CASCADE;
-NOTICE:  drop cascades to 2 other objects
-DETAIL:  drop cascades to table users_table_local
-drop cascades to table events_table_local
+NOTICE:  drop cascades to 3 other objects
 SET search_path TO public;

src/test/regress/sql/subquery_local_tables.sql

@@ -200,5 +200,15 @@ ORDER BY 1;
 
 SET client_min_messages TO DEFAULT;
 
+-- Test https://github.com/citusdata/citus/issues/2717
+create table test_dist (id int, table_name text, column_name text);
+select create_distributed_table('test_dist','id');
+insert into test_dist values (1, 'test_dist', 'table_name');
+with q as (
+    select icl.* from test_dist td
+    join information_schema.columns icl on icl.table_name::text = lower(td.table_name) and icl.column_name::text = lower(td.column_name)
+) select column_name from q;
+
+\set VERBOSITY terse
 DROP SCHEMA subquery_local_tables CASCADE;
 SET search_path TO public;