MDEV-8755 Equal field propagation is not performed any longer for the IN list when multiple comparison types

1 files changed, 24 insertions, 0 deletions

diff --git a/mysql-test/r/func_in.result b/mysql-test/r/func_in.result
index 51817c24932..33a997c8004 100644
--- a/mysql-test/r/func_in.result
+++ b/mysql-test/r/func_in.result
@@ -812,3 +812,27 @@ EXECUTE s;
 1
 DROP TABLE t1;
 # End of 5.3 tests
+#
+# MDEV-8755 Equal field propagation is not performed any longer for the IN list when multiple comparison types
+#
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (1),(2);
+# Ok to propagate equalities into the left IN argument in case of a single comparison type
+EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=1 AND a IN (1,2,3);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
+Warnings:
+Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` = 1)
+# Ok to propagate equalities into IN () list, even if multiple comparison types
+EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=1 AND 1 IN (1,a,'3');
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
+Warnings:
+Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where (`test`.`t1`.`a` = 1)
+# Not Ok to propagate equalities into the left IN argument in case of multiple comparison types
+EXPLAIN EXTENDED SELECT * FROM t1 WHERE a=1 AND a IN (1,2,'3');
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
+Warnings:
+Note	1003	select `test`.`t1`.`a` AS `a` from `test`.`t1` where ((`test`.`t1`.`a` = 1) and (`test`.`t1`.`a` in (1,2,'3')))
+DROP TABLE t1;