Add ORDER BY to multi_subquery_in_where_clause

src/test/regress/expected/multi_subquery_in_where_clause.out

@@ -612,7 +612,7 @@ WHERE
           );
 ERROR:  cannot push down this subquery
 DETAIL:  Offset clause is currently unsupported when a subquery references a column from another query
--- we can detect unsupported subquerues even if they appear
+-- we can detect unsupported subqueries even if they appear
 -- in WHERE subquery -> FROM subquery -> WHERE subquery
 -- but we can recursively plan that anyway
 SELECT DISTINCT user_id 
@@ -636,15 +636,14 @@ WHERE  user_id
                 users_table u1, events_table e1 
               WHERE 
                 e1.user_id = u1.user_id
-                AND e1.user_id IN (SELECT user_id FROM users_table LIMIT 3 )
+                AND e1.user_id IN (SELECT user_id FROM users_table ORDER BY user_id LIMIT 3)
              ) as f_outer
 		WHERE f_inner.user_id = f_outer.user_id
           ) ORDER BY 1 LIMIT 3;
  user_id 
 ---------
        1
-       5
+(1 row)
-(2 rows)
 
 -- semi join is not on the partition key for the third subquery, and recursively planned
 SET client_min_messages TO DEBUG1;

src/test/regress/sql/multi_subquery_in_where_clause.sql

@@ -518,7 +518,7 @@ WHERE
            OFFSET 3
           );
 
--- we can detect unsupported subquerues even if they appear
+-- we can detect unsupported subqueries even if they appear
 -- in WHERE subquery -> FROM subquery -> WHERE subquery
 -- but we can recursively plan that anyway
 SELECT DISTINCT user_id 
@@ -542,7 +542,7 @@ WHERE  user_id
                 users_table u1, events_table e1 
               WHERE 
                 e1.user_id = u1.user_id
-                AND e1.user_id IN (SELECT user_id FROM users_table LIMIT 3 )
+                AND e1.user_id IN (SELECT user_id FROM users_table ORDER BY user_id LIMIT 3)
              ) as f_outer
 		WHERE f_inner.user_id = f_outer.user_id
           ) ORDER BY 1 LIMIT 3;