Merge MariaDB-5.2 -> MariaDB 5.3

1 files changed, 61 insertions, 0 deletions

diff --git a/mysql-test/r/order_by.result b/mysql-test/r/order_by.result
index 334f1547276..58e0e244fd3 100644
--- a/mysql-test/r/order_by.result
+++ b/mysql-test/r/order_by.result
@@ -1444,6 +1444,36 @@ FROM t3;
 2
 NULL
 DROP TABLE t1, t2, t3;
+#
+# Bug #42760: Select doesn't return desired results when we have null
+# values
+#
+CREATE TABLE t1 (
+a INT,
+c INT,
+UNIQUE KEY a_c (a,c),
+KEY (a));
+INSERT INTO t1 VALUES (1, 10), (2, NULL);
+# Must use ref-or-null on the a_c index
+EXPLAIN
+SELECT 1 AS col FROM t1 WHERE a=2 AND (c=10 OR c IS NULL) ORDER BY c;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref_or_null	a_c,a	a_c	10	const,const	1	Using where
+# Must return 1 row
+SELECT 1 AS col FROM t1 WHERE a=2 AND (c=10 OR c IS NULL) ORDER BY c;
+col
+1
+# Must use ref-or-null on the a_c index
+EXPLAIN
+SELECT 1 AS col FROM t1 WHERE a=2 AND (c=10 OR c IS NULL) ORDER BY c DESC;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+x	x	x	ref_or_null	a_c,a	x	x	x	x	x
+# Must return 1 row
+SELECT 1 AS col FROM t1 WHERE a=2 AND (c=10 OR c IS NULL) ORDER BY c DESC;
+col
+1
+DROP TABLE t1;
+End of 5.0 tests
 CREATE TABLE t2 (a varchar(32), b int(11), c float, d double, 
 UNIQUE KEY a (a,b,c), KEY b (b), KEY c (c));
 CREATE TABLE t1 (a varchar(32), b char(3), UNIQUE KEY a (a,b), KEY b (b));
@@ -1557,3 +1587,34 @@ a
 2001
 1991
 DROP TABLE t1;
+#
+# Bug #43029: FORCE INDEX FOR ORDER BY is ignored when join buffering 
+#   is used
+#
+CREATE TABLE t1 (a INT, b INT, KEY (a));
+INSERT INTO t1 VALUES (0, NULL), (1, NULL), (2, NULL), (3, NULL);
+INSERT INTO t1 SELECT a+4, b FROM t1;
+INSERT INTO t1 SELECT a+8, b FROM t1;
+CREATE TABLE t2 (a INT, b INT);
+INSERT INTO t2 VALUES (0,NULL), (1,NULL), (2,NULL), (3,NULL), (4,NULL);
+INSERT INTO t2 SELECT a+4, b FROM t2;
+# shouldn't have "using filesort"
+EXPLAIN 
+SELECT * FROM t1 FORCE INDEX FOR ORDER BY (a), t2 WHERE t1.a < 2 ORDER BY t1.a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	range	a	a	5	NULL	2	Using index condition; Using MRR; Using temporary; Using filesort
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	10	Using join buffer
+# should have "using filesort"
+EXPLAIN 
+SELECT * FROM t1 USE INDEX FOR ORDER BY (a), t2 WHERE t1.a < 2 ORDER BY t1.a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	range	a	a	5	NULL	2	Using index condition; Using MRR; Using temporary; Using filesort
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	10	Using join buffer
+# should have "using filesort"
+EXPLAIN 
+SELECT * FROM t1 FORCE INDEX FOR JOIN (a), t2 WHERE t1.a < 2 ORDER BY t1.a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	range	a	a	5	NULL	2	Using index condition; Using MRR; Using temporary; Using filesort
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	10	Using join buffer
+DROP TABLE t1, t2;
+End of 5.1 tests