From 4b7919368ebd14ec09eef1e8508ebbab71b86e0c Mon Sep 17 00:00:00 2001
From: Igor Babaev <igor@askmonty.org>
Date: Sat, 14 Jan 2012 00:02:02 -0800
Subject: [PATCH] Back-ported the test case for bug #12616253 from mariadb-5.3
 that was actually a duplicate of LP bug #888456 fixed in mariadb-5.2.

---
 mysql-test/r/subselect.result | 41 +++++++++++++++++++++++++++++++++++
 mysql-test/t/subselect.test   | 21 ++++++++++++++++++
 2 files changed, 62 insertions(+)

diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result
index f1e65f0fb1f..101869e2843 100644
--- a/mysql-test/r/subselect.result
+++ b/mysql-test/r/subselect.result
@@ -5155,4 +5155,45 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
 2	SUBQUERY	t1	ref	a	a	5	const	1	Using where; Using index
 DROP TABLE t1;
+#
+# BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS)
+# (duplicate of LP bug #888456)
+CREATE TABLE t1 (f1 varchar(1));
+INSERT INTO t1 VALUES ('v'),('s');
+CREATE TABLE t2 (f1_key varchar(1), KEY (f1_key));
+INSERT INTO t2 VALUES ('j'),('v'),('c'),('m'),('d'),
+('d'),('y'),('t'),('d'),('s');
+EXPLAIN
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	table1	ALL	NULL	NULL	NULL	NULL	2	
+1	PRIMARY	table2	index	NULL	f1_key	4	NULL	10	Using where; Using index; Using join buffer
+2	DEPENDENT SUBQUERY	t2	index	f1_key	f1_key	4	NULL	10	Using where; Using index; Using temporary
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+f1	f1_key
+v	j
+s	j
+v	v
+s	v
+v	c
+s	c
+v	m
+s	m
+v	d
+s	d
+v	d
+s	d
+v	y
+s	y
+v	t
+s	t
+v	d
+s	d
+v	s
+s	s
+DROP TABLE t1,t2;
 End of 5.2 tests
diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test
index 1f3c102770c..24aad3a145d 100644
--- a/mysql-test/t/subselect.test
+++ b/mysql-test/t/subselect.test
@@ -4022,4 +4022,25 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7);
 
 DROP TABLE t1;
 
+--echo #
+--echo # BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS)
+--echo # (duplicate of LP bug #888456)
+
+CREATE TABLE t1 (f1 varchar(1));
+INSERT INTO t1 VALUES ('v'),('s');
+
+CREATE TABLE t2 (f1_key varchar(1), KEY (f1_key));
+INSERT INTO t2 VALUES ('j'),('v'),('c'),('m'),('d'),
+('d'),('y'),('t'),('d'),('s');
+
+EXPLAIN
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+  WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+                  WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+  WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+                  WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+
+DROP TABLE t1,t2;
+
 --echo End of 5.2 tests