Code review comment.

Author: dilipbiswal

sql/core/src/test/resources/sql-tests/inputs/subquery/exists-subquery/exists-joins-and-set-ops.sql

@@ -182,7 +182,7 @@ WHERE  NOT EXISTS (SELECT *
                      WHERE  dept_id >= 30 
                             AND dept_id <= 50); 
 
--- Union in outer query and except,intersect in subqueries. 
+-- Union all in outer query and except,intersect in subqueries. 
 -- TC.02.04       
 SELECT * 
 FROM   emp 
@@ -204,3 +204,25 @@ WHERE  EXISTS (SELECT *
                  WHERE  dept_id >= 30 
                         AND dept_id <= 50);
 
+-- Union in outer query and except,intersect in subqueries. 
+-- TC.02.05       
+SELECT * 
+FROM   emp 
+WHERE  EXISTS (SELECT * 
+                 FROM   dept 
+                 EXCEPT 
+                 SELECT * 
+                 FROM   dept 
+                 WHERE  dept_id > 50)
+UNION
+SELECT * 
+FROM   emp 
+WHERE  EXISTS (SELECT * 
+                 FROM   dept 
+                 WHERE  dept_id < 30 
+                 INTERSECT 
+                 SELECT * 
+                 FROM   dept 
+                 WHERE  dept_id >= 30 
+                        AND dept_id <= 50);
+

sql/core/src/test/resources/sql-tests/results/subquery/exists-subquery/exists-joins-and-set-ops.sql.out

@@ -1,5 +1,5 @@
 -- Automatically generated by SQLQueryTestSuite
--- Number of queries: 16
+-- Number of queries: 17
 
 
 -- !query 0
@@ -328,3 +328,36 @@ struct<id:int,emp_name:string,hiredate:date,salary:double,dept_id:int>
 600	emp 6 - no dept	2001-01-01	400.0	100
 700	emp 7	2010-01-01	400.0	100
 800	emp 8	2016-01-01	150.0	70
+
+
+-- !query 16
+SELECT * 
+FROM   emp 
+WHERE  EXISTS (SELECT * 
+                 FROM   dept 
+                 EXCEPT 
+                 SELECT * 
+                 FROM   dept 
+                 WHERE  dept_id > 50)
+UNION
+SELECT * 
+FROM   emp 
+WHERE  EXISTS (SELECT * 
+                 FROM   dept 
+                 WHERE  dept_id < 30 
+                 INTERSECT 
+                 SELECT * 
+                 FROM   dept 
+                 WHERE  dept_id >= 30 
+                        AND dept_id <= 50)
+-- !query 16 schema
+struct<id:int,emp_name:string,hiredate:date,salary:double,dept_id:int>
+-- !query 16 output
+100	emp 1	2005-01-01	100.0	10
+200	emp 2	2003-01-01	200.0	10
+300	emp 3	2002-01-01	300.0	20
+400	emp 4	2005-01-01	400.0	30
+500	emp 5	2001-01-01	400.0	NULL
+600	emp 6 - no dept	2001-01-01	400.0	100
+700	emp 7	2010-01-01	400.0	100
+800	emp 8	2016-01-01	150.0	70