Merge remote-tracking branch '5.5' into 10.0

1 files changed, 22 insertions, 0 deletions

diff --git a/mysql-test/r/subselect_sj2_mat.result b/mysql-test/r/subselect_sj2_mat.result
index c00ce7ec227..5d0c64e9ddb 100644
--- a/mysql-test/r/subselect_sj2_mat.result
+++ b/mysql-test/r/subselect_sj2_mat.result
@@ -1612,3 +1612,25 @@ Warnings:
 Note	1003	select `test`.`t1`.`i` AS `i` from `test`.`t1` semi join (`test`.`t2`) where ((rand() < 0))
 drop table t1,t2;
 set optimizer_switch=@save_optimizer_switch;
+#
+# mdev-12855: materialization of a semi-join subquery + ORDER BY 
+#
+CREATE TABLE t1 (f1 varchar(8), KEY(f1)) ENGINE=InnoDB;
+INSERT INTO t1 VALUES ('qux'),('foo');
+CREATE TABLE t2 (f2 varchar(8)) ENGINE=InnoDB;
+INSERT INTO t2 VALUES ('bar'),('foo'),('qux');
+SELECT f1 FROM t1 
+WHERE f1 IN ( SELECT f2 FROM t2 WHERE f2 > 'bar' )
+HAVING f1 != 'foo'
+ORDER BY f1;
+f1
+qux
+explain SELECT f1 FROM t1 
+WHERE f1 IN ( SELECT f2 FROM t2 WHERE f2 > 'bar' )
+HAVING f1 != 'foo'
+ORDER BY f1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	index	f1	f1	11	NULL	2	Using index
+1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	11	func	1	
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	3	Using where
+DROP TABLE t1,t2;