Merge gleb.loc:/home/uchum/work/bk/5.0

into  gleb.loc:/home/uchum/work/bk/5.0-opt

16 files changed, 417 insertions, 3 deletions

diff --git a/mysql-test/r/delete.result b/mysql-test/r/delete.result
index 4bdf1c770d3..d333425f23a 100644
--- a/mysql-test/r/delete.result
+++ b/mysql-test/r/delete.result
@@ -223,3 +223,40 @@ ERROR 42S22: Unknown column 't2.x' in 'order clause'
 DELETE FROM t1 ORDER BY (SELECT x);
 ERROR 42S22: Unknown column 'x' in 'field list'
 DROP TABLE t1;
+CREATE TABLE t1 (
+a INT
+);
+CREATE TABLE t2 (
+a INT
+);
+CREATE DATABASE db1;
+CREATE TABLE db1.t1 (
+a INT
+);
+INSERT INTO db1.t1 (a) SELECT * FROM t1;
+CREATE DATABASE db2;
+CREATE TABLE db2.t1 (
+a INT
+);
+INSERT INTO db2.t1 (a) SELECT * FROM t2;
+DELETE FROM t1 alias USING t1, t2 alias WHERE t1.a = alias.a;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'alias USING t1, t2 alias WHERE t1.a = alias.a' at line 1
+DELETE FROM alias USING t1, t2 alias WHERE t1.a = alias.a;
+DELETE FROM t1, alias USING t1, t2 alias WHERE t1.a = alias.a;
+DELETE FROM t1, t2 USING t1, t2 alias WHERE t1.a = alias.a;
+ERROR 42S02: Unknown table 't2' in MULTI DELETE
+DELETE FROM db1.t1 alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a' at line 1
+DELETE FROM alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
+ERROR 42S02: Unknown table 'alias' in MULTI DELETE
+DELETE FROM db2.alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
+DELETE FROM t1 USING t1 WHERE a = 1;
+SELECT * FROM t1;
+a
+DELETE FROM t1 alias USING t1 alias WHERE a = 2;
+ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'alias USING t1 alias WHERE a = 2' at line 1
+SELECT * FROM t1;
+a
+DROP TABLE t1, t2;
+DROP DATABASE db1;
+DROP DATABASE db2;
diff --git a/mysql-test/r/distinct.result b/mysql-test/r/distinct.result
index 8525e0f19e4..8cfe5aa78b5 100644
--- a/mysql-test/r/distinct.result
+++ b/mysql-test/r/distinct.result
@@ -526,10 +526,10 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	index	NULL	PRIMARY	4	NULL	3	Using index
 EXPLAIN SELECT a,b FROM t1 GROUP BY a,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using filesort
 EXPLAIN SELECT DISTINCT a,b FROM t1 GROUP BY a,b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using filesort
 CREATE TABLE t2(a INT, b INT NOT NULL, c INT NOT NULL, d INT, 
 PRIMARY KEY (a,b));
 INSERT INTO t2 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
@@ -554,7 +554,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 CREATE UNIQUE INDEX c_b_unq ON t2 (c,b);
 EXPLAIN SELECT DISTINCT a,b,d FROM t2 GROUP BY c,b,d;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	Using filesort
 DROP TABLE t1,t2;
 create table t1 (id int, dsc varchar(50));
 insert into t1 values (1, "line number one"), (2, "line number two"), (3, "line number three");
diff --git a/mysql-test/r/group_by.result b/mysql-test/r/group_by.result
index d4ffbe43a91..053c2901509 100644
--- a/mysql-test/r/group_by.result
+++ b/mysql-test/r/group_by.result
@@ -1064,3 +1064,52 @@ select t1.f1,t.* from t1, t1 t group by 1;
 ERROR 42000: 'test.t.f1' isn't in GROUP BY
 drop table t1;
 SET SQL_MODE = '';
+CREATE TABLE t1(
+a INT, 
+b INT NOT NULL, 
+c INT NOT NULL, 
+d INT, 
+UNIQUE KEY (c,b)
+);
+INSERT INTO t1 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using filesort
+SELECT c,b,d FROM t1 GROUP BY c,b,d;
+c	b	d
+1	1	50
+3	1	4
+3	2	40
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	
+SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
+c	b	d
+1	1	50
+3	2	40
+3	1	4
+EXPLAIN SELECT c,b,d FROM t1 ORDER BY c,b,d;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using filesort
+SELECT c,b,d FROM t1 ORDER BY c,b,d;
+c	b	d
+1	1	50
+3	1	4
+3	2	40
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using filesort
+SELECT c,b,d FROM t1 GROUP BY c,b;
+c	b	d
+1	1	50
+3	1	4
+3	2	40
+EXPLAIN SELECT c,b   FROM t1 GROUP BY c,b;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	index	NULL	c	8	NULL	3	Using index
+SELECT c,b   FROM t1 GROUP BY c,b;
+c	b
+1	1
+3	1
+3	2
+DROP TABLE t1;
diff --git a/mysql-test/r/innodb_mysql.result b/mysql-test/r/innodb_mysql.result
index c93d26bbd04..be678efd0ef 100644
--- a/mysql-test/r/innodb_mysql.result
+++ b/mysql-test/r/innodb_mysql.result
@@ -1065,4 +1065,53 @@ a	b
 ROLLBACK;
 ROLLBACK;
 DROP TABLE t1;
+CREATE TABLE t1(
+a INT, 
+b INT NOT NULL, 
+c INT NOT NULL, 
+d INT, 
+UNIQUE KEY (c,b)
+) engine=innodb;
+INSERT INTO t1 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using filesort
+SELECT c,b,d FROM t1 GROUP BY c,b,d;
+c	b	d
+1	1	50
+3	1	4
+3	2	40
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	
+SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
+c	b	d
+1	1	50
+3	1	4
+3	2	40
+EXPLAIN SELECT c,b,d FROM t1 ORDER BY c,b,d;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	3	Using filesort
+SELECT c,b,d FROM t1 ORDER BY c,b,d;
+c	b	d
+1	1	50
+3	1	4
+3	2	40
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	index	NULL	c	8	NULL	3	
+SELECT c,b,d FROM t1 GROUP BY c,b;
+c	b	d
+1	1	50
+3	1	4
+3	2	40
+EXPLAIN SELECT c,b   FROM t1 GROUP BY c,b;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	index	NULL	c	8	NULL	3	Using index
+SELECT c,b   FROM t1 GROUP BY c,b;
+c	b
+1	1
+3	1
+3	2
+DROP TABLE t1;
 End of 5.0 tests
diff --git a/mysql-test/r/mysqldump-compat.result b/mysql-test/r/mysqldump-compat.result
new file mode 100644
index 00000000000..f15cc7a1d7a
--- /dev/null
+++ b/mysql-test/r/mysqldump-compat.result
@@ -0,0 +1,4 @@
+CREATE DATABASE mysqldump_30126;
+USE mysqldump_30126;
+CREATE TABLE t1 (c1 int);
+DROP DATABASE mysqldump_30126;
diff --git a/mysql-test/r/sp.result b/mysql-test/r/sp.result
index 2cfbe7aadcb..d446361cea8 100644
--- a/mysql-test/r/sp.result
+++ b/mysql-test/r/sp.result
@@ -6315,4 +6315,26 @@ CALL p1();
 NULL
 SET NAMES default;
 DROP PROCEDURE p1;
+create function f1()
+returns int(11)
+not deterministic
+contains sql
+sql security definer
+comment ''
+begin
+declare x int(11);
+set x=-1;
+return x;
+end|
+create view v1 as select 1 as one, f1() as days;
+show create view test.v1;
+View	Create View
+v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `test`.`v1` AS select 1 AS `one`,`f1`() AS `days`
+select column_name from information_schema.columns
+where table_name='v1' and table_schema='test';
+column_name
+one
+days
+drop view v1;
+drop function f1;
 End of 5.0 tests
diff --git a/mysql-test/r/status.result b/mysql-test/r/status.result
index ca21b333a6a..36857e22aaf 100644
--- a/mysql-test/r/status.result
+++ b/mysql-test/r/status.result
@@ -43,3 +43,51 @@ SHOW STATUS LIKE 'max_used_connections';
 Variable_name	Value
 Max_used_connections	4
 SET GLOBAL thread_cache_size=@save_thread_cache_size;
+CREATE TABLE t1 ( a INT );
+INSERT INTO t1 VALUES (1), (2);
+SELECT a FROM t1 LIMIT 1;
+a
+1
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+Variable_name	Value
+Last_query_cost	2.402418
+EXPLAIN SELECT a FROM t1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+Variable_name	Value
+Last_query_cost	2.402418
+SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
+a
+1
+2
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+Variable_name	Value
+Last_query_cost	0.000000
+EXPLAIN SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
+2	UNION	t1	ALL	NULL	NULL	NULL	NULL	2	
+NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	Using filesort
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+Variable_name	Value
+Last_query_cost	0.000000
+SELECT a IN (SELECT a FROM t1) FROM t1 LIMIT 1;
+a IN (SELECT a FROM t1)
+1
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+Variable_name	Value
+Last_query_cost	0.000000
+SELECT (SELECT a FROM t1 LIMIT 1) x FROM t1 LIMIT 1;
+x
+1
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+Variable_name	Value
+Last_query_cost	0.000000
+SELECT * FROM t1 a, t1 b LIMIT 1;
+a	a
+1	1
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+Variable_name	Value
+Last_query_cost	4.805836
+DROP TABLE t1;
diff --git a/mysql-test/r/type_bit.result b/mysql-test/r/type_bit.result
index 7c765d6d50b..5356f7e0712 100644
--- a/mysql-test/r/type_bit.result
+++ b/mysql-test/r/type_bit.result
@@ -642,4 +642,19 @@ b+0	COUNT(DISTINCT a)
 1	1
 3	2
 DROP TABLE t1;
+CREATE TABLE t1 (b BIT);
+INSERT INTO t1 (b) VALUES (1), (0);
+SELECT DISTINCT b FROM t1;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def	test	t1	t1	b	b	16	1	1	Y	32	0	63
+b
+#
+#
+SELECT b FROM t1 GROUP BY b;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def	test	t1	t1	b	b	16	1	1	Y	32	0	63
+b
+#
+#
+DROP TABLE t1;
 End of 5.0 tests
diff --git a/mysql-test/t/delete.test b/mysql-test/t/delete.test
index 36d627209db..e3713d248c4 100644
--- a/mysql-test/t/delete.test
+++ b/mysql-test/t/delete.test
@@ -221,3 +221,47 @@ DELETE FROM t1 ORDER BY t2.x;
 DELETE FROM t1 ORDER BY (SELECT x);
 
 DROP TABLE t1;
+
+#
+# Bug #30234: Unexpected behavior using DELETE with AS and USING
+# '
+CREATE TABLE t1 (
+  a INT
+);
+
+CREATE TABLE t2 (
+  a INT
+);
+
+CREATE DATABASE db1;
+CREATE TABLE db1.t1 (
+  a INT
+);
+INSERT INTO db1.t1 (a) SELECT * FROM t1;
+
+CREATE DATABASE db2;
+CREATE TABLE db2.t1 (
+  a INT
+);
+INSERT INTO db2.t1 (a) SELECT * FROM t2;
+
+--error ER_PARSE_ERROR
+DELETE FROM t1 alias USING t1, t2 alias WHERE t1.a = alias.a;
+DELETE FROM alias USING t1, t2 alias WHERE t1.a = alias.a;
+DELETE FROM t1, alias USING t1, t2 alias WHERE t1.a = alias.a;
+--error ER_UNKNOWN_TABLE
+DELETE FROM t1, t2 USING t1, t2 alias WHERE t1.a = alias.a;
+--error ER_PARSE_ERROR
+DELETE FROM db1.t1 alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
+--error ER_UNKNOWN_TABLE
+DELETE FROM alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
+DELETE FROM db2.alias USING db1.t1, db2.t1 alias WHERE db1.t1.a = alias.a;
+DELETE FROM t1 USING t1 WHERE a = 1;
+SELECT * FROM t1;
+--error ER_PARSE_ERROR
+DELETE FROM t1 alias USING t1 alias WHERE a = 2;
+SELECT * FROM t1;
+
+DROP TABLE t1, t2;
+DROP DATABASE db1;
+DROP DATABASE db2;
diff --git a/mysql-test/t/group_by.test b/mysql-test/t/group_by.test
index 91e69f9db34..b7c28cada46 100644
--- a/mysql-test/t/group_by.test
+++ b/mysql-test/t/group_by.test
@@ -788,3 +788,30 @@ select * from t1 group by f1, f2;
 select t1.f1,t.* from t1, t1 t group by 1;
 drop table t1;
 SET SQL_MODE = '';
+
+#
+# Bug#30596: GROUP BY optimization gives wrong result order
+#
+CREATE TABLE t1(
+  a INT, 
+  b INT NOT NULL, 
+  c INT NOT NULL, 
+  d INT, 
+  UNIQUE KEY (c,b)
+);
+
+INSERT INTO t1 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
+
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d;
+SELECT c,b,d FROM t1 GROUP BY c,b,d;
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
+SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
+EXPLAIN SELECT c,b,d FROM t1 ORDER BY c,b,d;
+SELECT c,b,d FROM t1 ORDER BY c,b,d;
+
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b;
+SELECT c,b,d FROM t1 GROUP BY c,b;
+EXPLAIN SELECT c,b   FROM t1 GROUP BY c,b;
+SELECT c,b   FROM t1 GROUP BY c,b;
+
+DROP TABLE t1;
diff --git a/mysql-test/t/innodb_mysql.test b/mysql-test/t/innodb_mysql.test
index aecefda93d3..c39c88096c4 100644
--- a/mysql-test/t/innodb_mysql.test
+++ b/mysql-test/t/innodb_mysql.test
@@ -910,4 +910,31 @@ ROLLBACK;
 ROLLBACK;
 DROP TABLE t1;
 
+#
+# Bug#30596: GROUP BY optimization gives wrong result order
+#  
+CREATE TABLE t1(
+  a INT, 
+  b INT NOT NULL, 
+  c INT NOT NULL, 
+  d INT, 
+  UNIQUE KEY (c,b)
+) engine=innodb;
+
+INSERT INTO t1 VALUES (1,1,1,50), (1,2,3,40), (2,1,3,4);
+
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d;
+SELECT c,b,d FROM t1 GROUP BY c,b,d;
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
+SELECT c,b,d FROM t1 GROUP BY c,b,d ORDER BY NULL;
+EXPLAIN SELECT c,b,d FROM t1 ORDER BY c,b,d;
+SELECT c,b,d FROM t1 ORDER BY c,b,d;
+
+EXPLAIN SELECT c,b,d FROM t1 GROUP BY c,b;
+SELECT c,b,d FROM t1 GROUP BY c,b;
+EXPLAIN SELECT c,b   FROM t1 GROUP BY c,b;
+SELECT c,b   FROM t1 GROUP BY c,b;
+
+DROP TABLE t1;
+
 --echo End of 5.0 tests
diff --git a/mysql-test/t/mysqldump-compat.opt b/mysql-test/t/mysqldump-compat.opt
new file mode 100644
index 00000000000..40d4ac738a6
--- /dev/null
+++ b/mysql-test/t/mysqldump-compat.opt
@@ -0,0 +1 @@
+--loose-debug=d,4x_server_emul
diff --git a/mysql-test/t/mysqldump-compat.test b/mysql-test/t/mysqldump-compat.test
new file mode 100644
index 00000000000..848d66cc728
--- /dev/null
+++ b/mysql-test/t/mysqldump-compat.test
@@ -0,0 +1,13 @@
+# Embedded server doesn't support external clients
+--source include/not_embedded.inc
+
+#
+# Bug #30126: semicolon before closing */ in /*!... CREATE DATABASE ;*/
+#
+
+CREATE DATABASE mysqldump_30126;
+USE mysqldump_30126;
+CREATE TABLE t1 (c1 int);
+--exec $MYSQL_DUMP --add-drop-database mysqldump_30126 > $MYSQLTEST_VARDIR/tmp/bug30126.sql
+--exec $MYSQL mysqldump_30126 < $MYSQLTEST_VARDIR/tmp/bug30126.sql
+DROP DATABASE mysqldump_30126;
diff --git a/mysql-test/t/sp.test b/mysql-test/t/sp.test
index 0b3dd89f3fa..30e0baaea32 100644
--- a/mysql-test/t/sp.test
+++ b/mysql-test/t/sp.test
@@ -7300,4 +7300,37 @@ CALL p1();
 SET NAMES default;
 DROP PROCEDURE p1;
 
+#
+# Bug#29408 Cannot find view in columns table if the selection contains a function
+#
+delimiter |;
+
+create function f1()
+    returns int(11)
+not deterministic
+contains sql
+sql security definer
+comment ''
+begin
+  declare x int(11);
+  set x=-1;
+   return x;
+end|
+                          
+delimiter ;|
+                  
+create view v1 as select 1 as one, f1() as days;
+                          
+connect (bug29408, localhost, root,,*NO-ONE*);                     
+connection bug29408;
+
+show create view test.v1;      
+select column_name from information_schema.columns
+where table_name='v1' and table_schema='test';
+
+connection default;
+disconnect bug29408;
+drop view v1;
+drop function f1;
+
 --echo End of 5.0 tests
diff --git a/mysql-test/t/status.test b/mysql-test/t/status.test
index 6fcb82e160d..33bba3a626a 100644
--- a/mysql-test/t/status.test
+++ b/mysql-test/t/status.test
@@ -139,4 +139,36 @@ disconnect con3;
 disconnect con2;
 disconnect con1;
 
+
+#
+# Bug #30377: EXPLAIN loses last_query_cost when used with UNION
+#
+
+CREATE TABLE t1 ( a INT );
+INSERT INTO t1 VALUES (1), (2);
+
+SELECT a FROM t1 LIMIT 1;
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+
+EXPLAIN SELECT a FROM t1;
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+
+SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+
+EXPLAIN SELECT a FROM t1 UNION SELECT a FROM t1 ORDER BY a;
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+
+SELECT a IN (SELECT a FROM t1) FROM t1 LIMIT 1;
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+
+SELECT (SELECT a FROM t1 LIMIT 1) x FROM t1 LIMIT 1;
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+
+SELECT * FROM t1 a, t1 b LIMIT 1;
+SHOW SESSION STATUS LIKE 'Last_query_cost';
+
+DROP TABLE t1;
+
+
 # End of 5.0 tests
diff --git a/mysql-test/t/type_bit.test b/mysql-test/t/type_bit.test
index 6423d017afb..66538f59c6f 100644
--- a/mysql-test/t/type_bit.test
+++ b/mysql-test/t/type_bit.test
@@ -291,4 +291,17 @@ INSERT INTO t1 (b, a) VALUES (1, 1), (3, 2), (0, 3), (3, 4);
 SELECT b+0, COUNT(DISTINCT a) FROM t1 GROUP BY b;
 DROP TABLE t1;
 
+#
+# Bug#30245: A wrong type of a BIT field is reported when grouped by it.
+#
+CREATE TABLE t1 (b BIT);
+INSERT INTO t1 (b) VALUES (1), (0);
+--enable_metadata
+--replace_column 1 #
+SELECT DISTINCT b FROM t1;
+--replace_column 1 #
+SELECT b FROM t1 GROUP BY b;
+--disable_metadata
+DROP TABLE t1;
+
 --echo End of 5.0 tests