CREATE TABLE t1(id INT);
INSERT INTO t1 VALUES (1),(2),(3),(4);
INSERT INTO t1 SELECT a.id FROM t1 a,t1 b,t1 c,t1 d;
SET @orig_debug = @@debug;
SET SESSION debug="d,subselect_exec_fail";
SELECT SUM(EXISTS(SELECT RAND() FROM t1)) FROM t1;
SUM(EXISTS(SELECT RAND() FROM t1))
0
SELECT REVERSE(EXISTS(SELECT RAND() FROM t1));
REVERSE(EXISTS(SELECT RAND() FROM t1))
0
SET SESSION debug=@orig_debug;
DROP TABLE t1;
#
# Bug#21383882 ASSERTION FAILED: 0 IN SELECT_LEX::PRINT()
#
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES(1),(1);
SELECT ((SELECT 1 FROM t1) IN (SELECT 1 FROM t1)) - (11111111111111111111);
ERROR 21000: Subquery returns more than 1 row
DROP TABLE t1;
#
# Bug#26679495: SIG 11 IN SUBSELECT_HASH_SJ_ENGINE::CLEANUP
#
CREATE TABLE t (x INT);
INSERT INTO t VALUES (1), (2), (3);
ANALYZE TABLE t;
Table	Op	Msg_type	Msg_text
test.t	analyze	status	OK
# The subquery should be materialized so that we
# use subselect_hash_sj_engine.
EXPLAIN SELECT * FROM t WHERE x IN (SELECT COUNT(*) FROM t GROUP BY x);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	t	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	Using where
2	SUBQUERY	t	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	Using temporary
Warnings:
Note	1003	/* select#1 */ select `test`.`t`.`x` AS `x` from `test`.`t` where <in_optimizer>(`test`.`t`.`x`,`test`.`t`.`x` in ( <materialize> (/* select#2 */ select count(0) from `test`.`t` group by `test`.`t`.`x` having true ), <primary_index_lookup>(`test`.`t`.`x` in <temporary table> on <auto_distinct_key> where ((`test`.`t`.`x` = `materialized-subquery`.`COUNT(*)`)))))
SELECT * FROM t WHERE x IN (SELECT COUNT(*) FROM t GROUP BY x);
x
1
# Execute the query with a simulated error in
# subselect_hash_sj_engine::setup().
SET DEBUG='+d,hash_semijoin_fail_in_setup';
SELECT * FROM t WHERE x IN (SELECT COUNT(*) FROM t GROUP BY x);
ERROR HY000: Unknown error
SET DEBUG='-d,hash_semijoin_fail_in_setup';
DROP TABLE t;
#
# Bug#26679983: SIG 11 IN MAKE_JOIN_READINFO|SQL/SQL_SELECT.CC
#
CREATE TABLE t (x INT);
INSERT INTO t VALUES (1), (2), (3);
ANALYZE TABLE t;
Table	Op	Msg_type	Msg_text
test.t	analyze	status	OK
# We want nested loop with duplicate weedout to reproduce the bug.
SET optimizer_switch = 'firstmatch=off,materialization=off';
EXPLAIN SELECT * FROM t WHERE x IN (SELECT x FROM t);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t	NULL	ALL	NULL	NULL	NULL	NULL	3	100.00	Start temporary
1	SIMPLE	t	NULL	ALL	NULL	NULL	NULL	NULL	3	33.33	Using where; End temporary; Using join buffer (Block Nested Loop)
Warnings:
Note	1003	/* select#1 */ select `test`.`t`.`x` AS `x` from `test`.`t` semi join (`test`.`t`) where (`test`.`t`.`x` = `test`.`t`.`x`)
SELECT * FROM t WHERE x IN (SELECT x FROM t);
x
1
2
3
# Execute the query with a simulated error in
# create_duplicate_weedout_tmp_table().
SET DEBUG='+d,create_duplicate_weedout_tmp_table_error';
SELECT * FROM t WHERE x IN (SELECT x FROM t);
ERROR HY000: Unknown error
SET DEBUG='-d,create_duplicate_weedout_tmp_table_error';
DROP TABLE t;
SET optimizer_switch = DEFAULT;