Manual merge

4 files changed, 168 insertions, 7 deletions

diff --git a/mysql-test/r/func_gconcat.result b/mysql-test/r/func_gconcat.result
index 09b6de796c4..184bd07b066 100644
--- a/mysql-test/r/func_gconcat.result
+++ b/mysql-test/r/func_gconcat.result
@@ -524,3 +524,34 @@ group_concat(a)
 ABW
 ABW
 drop table t1;
+CREATE TABLE t1 (
+aID smallint(5) unsigned NOT NULL auto_increment,
+sometitle varchar(255) NOT NULL default '',
+bID smallint(5) unsigned NOT NULL,
+PRIMARY KEY  (aID),
+UNIQUE KEY sometitle (sometitle)
+);
+INSERT INTO t1 SET sometitle = 'title1', bID = 1;
+INSERT INTO t1 SET sometitle = 'title2', bID = 1;
+CREATE TABLE t2 (
+bID smallint(5) unsigned NOT NULL auto_increment,
+somename varchar(255) NOT NULL default '',
+PRIMARY KEY  (bID),
+UNIQUE KEY somename (somename)
+);
+INSERT INTO t2 SET somename = 'test';
+SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
+FROM t1 JOIN t2 ON t1.bID = t2.bID;
+COUNT(*)	GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
+2	test
+INSERT INTO t2 SET somename = 'test2';
+SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
+FROM t1 JOIN t2 ON t1.bID = t2.bID;
+COUNT(*)	GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
+2	test
+DELETE FROM t2 WHERE somename = 'test2';
+SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
+FROM t1 JOIN t2 ON t1.bID = t2.bID;
+COUNT(*)	GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
+2	test
+DROP TABLE t1,t2;
diff --git a/mysql-test/r/null_key.result b/mysql-test/r/null_key.result
index b9824cc4b81..a74a01de8fb 100644
--- a/mysql-test/r/null_key.result
+++ b/mysql-test/r/null_key.result
@@ -369,3 +369,63 @@ select * from t1;
 id	id2
 1	1
 drop table t1;
+CREATE TABLE t1 (a int);
+CREATE TABLE t2 (a int, b int, INDEX idx(a));
+CREATE TABLE t3 (b int, INDEX idx(b));
+CREATE TABLE t4 (b int, INDEX idx(b));
+INSERT INTO t1 VALUES (1), (2), (3), (4);
+INSERT INTO t2 VALUES (1, 1), (3, 1);
+INSERT INTO t3 VALUES 
+(NULL), (NULL), (NULL), (NULL), (NULL),
+(NULL), (NULL), (NULL), (NULL), (NULL);
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t3 VALUES (2), (3);
+ANALYZE table t1, t2, t3;
+Table	Op	Msg_type	Msg_text
+test.t1	analyze	status	OK
+test.t2	analyze	status	OK
+test.t3	analyze	status	OK
+SELECT COUNT(*) FROM t3;
+COUNT(*)
+15972
+EXPLAIN SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
+LEFT JOIN t3 ON t2.b=t3.b;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	4	
+1	SIMPLE	t2	ref	idx	idx	5	test.t1.a	1	
+1	SIMPLE	t3	ref	idx	idx	5	test.t2.b	1	Using index
+FLUSH STATUS ;
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
+LEFT JOIN t3 ON t2.b=t3.b;
+a	a	b	b
+1	1	1	NULL
+2	NULL	NULL	NULL
+3	3	1	NULL
+4	NULL	NULL	NULL
+SHOW STATUS LIKE "handler_read%";
+Variable_name	Value
+Handler_read_first	0
+Handler_read_key	6
+Handler_read_next	2
+Handler_read_prev	0
+Handler_read_rnd	0
+Handler_read_rnd_next	5
+SELECT FOUND_ROWS();
+FOUND_ROWS()
+4
+DROP TABLE t1,t2,t3,t4;
diff --git a/mysql-test/t/func_gconcat.test b/mysql-test/t/func_gconcat.test
index 185a2fe1e78..9793d0d0a2c 100644
--- a/mysql-test/t/func_gconcat.test
+++ b/mysql-test/t/func_gconcat.test
@@ -310,12 +310,37 @@ select a, group_concat(b order by b) from t1 group by a with rollup;
 select a, group_concat(distinct b order by b) from t1 group by a with rollup;
 drop table t1;
 
-# End of 4.1 tests
-
 #
-# Bug #6475
+# Bug #12095: GROUP_CONCAT for one row table 
 #
-create table t1 (a char(3), b char(20), primary key (a, b));
-insert into t1 values ('ABW', 'Dutch'), ('ABW', 'English');
-select group_concat(a) from t1 group by b;
-drop table t1;
+
+CREATE TABLE t1 (
+  aID smallint(5) unsigned NOT NULL auto_increment,
+  sometitle varchar(255) NOT NULL default '',
+  bID smallint(5) unsigned NOT NULL,
+  PRIMARY KEY  (aID),
+  UNIQUE KEY sometitle (sometitle)
+);
+INSERT INTO t1 SET sometitle = 'title1', bID = 1;
+INSERT INTO t1 SET sometitle = 'title2', bID = 1;
+
+CREATE TABLE t2 (
+  bID smallint(5) unsigned NOT NULL auto_increment,
+  somename varchar(255) NOT NULL default '',
+  PRIMARY KEY  (bID),
+  UNIQUE KEY somename (somename)
+);
+INSERT INTO t2 SET somename = 'test';
+
+SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
+  FROM t1 JOIN t2 ON t1.bID = t2.bID;
+INSERT INTO t2 SET somename = 'test2';
+SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
+  FROM t1 JOIN t2 ON t1.bID = t2.bID;
+DELETE FROM t2 WHERE somename = 'test2';
+SELECT COUNT(*), GROUP_CONCAT(DISTINCT t2.somename SEPARATOR ' |')
+  FROM t1 JOIN t2 ON t1.bID = t2.bID;
+
+DROP TABLE t1,t2;
+
+# End of 4.1 tests
diff --git a/mysql-test/t/null_key.test b/mysql-test/t/null_key.test
index 318e1fa6b9b..ff8a4ff924c 100644
--- a/mysql-test/t/null_key.test
+++ b/mysql-test/t/null_key.test
@@ -194,4 +194,49 @@ delete from t1 where id <=> NULL;
 select * from t1;
 drop table t1;
 
+#
+# Test for bug #12144: optimizations for key access with null keys 
+#                      used for outer joins
+#
+
+CREATE TABLE t1 (a int);
+CREATE TABLE t2 (a int, b int, INDEX idx(a));
+CREATE TABLE t3 (b int, INDEX idx(b));
+CREATE TABLE t4 (b int, INDEX idx(b));
+INSERT INTO t1 VALUES (1), (2), (3), (4);
+INSERT INTO t2 VALUES (1, 1), (3, 1);
+INSERT INTO t3 VALUES 
+  (NULL), (NULL), (NULL), (NULL), (NULL),
+  (NULL), (NULL), (NULL), (NULL), (NULL);
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t4 SELECT * FROM t3;
+INSERT INTO t3 SELECT * FROM t4;
+INSERT INTO t3 VALUES (2), (3);
+
+ANALYZE table t1, t2, t3;
+
+SELECT COUNT(*) FROM t3;
+
+EXPLAIN SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
+                                             LEFT JOIN t3 ON t2.b=t3.b;
+FLUSH STATUS ;
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 LEFT JOIN t2 ON t1.a=t2.a
+                                     LEFT JOIN t3 ON t2.b=t3.b;
+SHOW STATUS LIKE "handler_read%";
+SELECT FOUND_ROWS();
+
+DROP TABLE t1,t2,t3,t4;
 # End of 4.1 tests