5.3-merge

1 files changed, 22 insertions, 0 deletions

diff --git a/mysql-test/r/subselect4.result b/mysql-test/r/subselect4.result
index 582b4e97f2e..c7f22cf05e5 100644
--- a/mysql-test/r/subselect4.result
+++ b/mysql-test/r/subselect4.result
@@ -2344,6 +2344,28 @@ id	a2	a3	id	a2	a3
 DROP VIEW v2;
 DROP TABLE t1,t2;
 #
+# MDEV-5686: degenerate disjunct in NOT IN subquery
+#
+CREATE TABLE t1 (a int, b int, c varchar(3)) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1,1,'CAN'),(2,2,'AUS');
+CREATE TABLE t2 (f int) ENGINE=MyISAM;
+INSERT INTO t2 VALUES (3);
+EXPLAIN EXTENDED
+SELECT * FROM t2 
+WHERE f NOT IN (SELECT b FROM t1
+WHERE 0 OR (c IN ('USA') OR c NOT IN ('USA')) AND a = b);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	100.00	
+2	DEPENDENT SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
+Warnings:
+Note	1003	select 3 AS `f` from dual where (not(<expr_cache><3>(<in_optimizer>(3,<exists>(select `test`.`t1`.`b` from `test`.`t1` where (((`test`.`t1`.`c` = 'USA') or (`test`.`t1`.`c` <> 'USA')) and trigcond(((<cache>(3) = `test`.`t1`.`b`) or isnull(`test`.`t1`.`b`))) and (`test`.`t1`.`b` = `test`.`t1`.`a`)) having trigcond(<is_not_null_test>(`test`.`t1`.`b`)))))))
+SELECT * FROM t2 
+WHERE f NOT IN (SELECT b FROM t1
+WHERE 0 OR (c IN ('USA') OR c NOT IN ('USA')) AND a = b);
+f
+3
+DROP TABLE t1,t2;
+#
 # MDEV-3899  Valgrind warnings (blocks are definitely lost) in filesort on IN subquery with SUM and DISTINCT
 #
 CREATE TABLE t1 (a INT) ENGINE=MyISAM;