# name: test/sql/setops/test_setops.test
# description: Test UNION/EXCEPT/INTERSECT
# group: [setops]

statement ok
PRAGMA enable_verification

query I
SELECT 1 UNION ALL SELECT 2
----
1
2

query IT
SELECT 1, 'a' UNION ALL SELECT 2, 'b'
----
1	a
2	b

query IT
SELECT 1, 'a' UNION ALL SELECT 2, 'b' UNION ALL SELECT 3, 'c' order by 1
----
1	a
2	b
3	c

query IT
SELECT 1, 'a' UNION ALL SELECT 2, 'b' UNION ALL SELECT 3, 'c' UNION ALL SELECT 4, 'd' order by 1
----
1	a
2	b
3	c
4	d

# UNION/EXCEPT/INTERSECT with NULL values
query I
SELECT NULL UNION SELECT NULL
----
NULL

query I
SELECT NULL EXCEPT SELECT NULL
----

query I
SELECT NULL INTERSECT SELECT NULL
----
NULL

# create tables
statement ok
CREATE TABLE test (a INTEGER, b INTEGER);

statement ok
INSERT INTO test VALUES (11, 1), (12, 1), (13, 2)

# UNION ALL, no unique results
query I
SELECT a FROM test WHERE a < 13 UNION ALL SELECT a FROM test WHERE a = 13
----
11
12
13

query I
SELECT b FROM test WHERE a < 13 UNION ALL SELECT b FROM test WHERE a > 11
----
1
1
1
2

# mixing types, should error
query I
SELECT 1 UNION ALL SELECT 'asdf'
----
1
asdf

query T
SELECT NULL UNION ALL SELECT 'asdf'
----
NULL
asdf

# only UNION, distinct results
query I
SELECT 1 UNION SELECT 1
----
1

query IT
SELECT 1, 'a' UNION SELECT 2, 'b' UNION SELECT 3, 'c' UNION SELECT 1, 'a' order by 1
----
1	a
2	b
3	c

query I
SELECT b FROM test WHERE a < 13 UNION  SELECT b FROM test WHERE a > 11 ORDER BY 1
----
1
2

# mixed fun
query IT
SELECT 1, 'a' UNION ALL SELECT 1, 'a' UNION SELECT 2, 'b' UNION SELECT 1, 'a' ORDER BY 1
----
1	a
2	b

query IT
SELECT 1, 'a' UNION ALL SELECT 1, 'a' UNION SELECT 2, 'b' UNION SELECT 1, 'a' ORDER BY 1 DESC
----
2	b
1	a


# EXCEPT ALL / INTERSECT ALL
query II
select x, count(*) as c
from ((select * from (values(1),(2),(2),(3),(3),(3),(4),(4),(4),(4)) s(x) except all select * from (values(1),(3),(3)) t(x)) intersect all select * from (values(2),(2),(2),(4),(3),(3)) u(x)) s
group by x order by x
----
2	2
3	1
4	1