set optimizer_switch='semijoin=on,materialization=on,firstmatch=on,loosescan=on,index_condition_pushdown=on,mrr=on';
SET sql_mode = 'NO_ENGINE_SUBSTITUTION';
create table t1 (id int);
insert into t1 values (null), (0);
create table t2 (id int);
insert into t2 values (null);
select * from t1, t2 where t1.id = t2.id;
id	id
alter table t1 add key id (id);
select * from t1, t2 where t1.id = t2.id;
id	id
drop table t1,t2;
create table t1 (
id  integer,
id2 integer not null,
index (id),
index (id2)
);
insert into t1 values(null,null),(1,1);
Warnings:
Warning	1048	Column 'id2' cannot be null
select * from t1;
id	id2
NULL	0
1	1
select * from t1 where id <=> null;
id	id2
NULL	0
select * from t1 where id <=> null or id > 0;
id	id2
NULL	0
1	1
select * from t1 where id is null or id > 0;
id	id2
NULL	0
1	1
select * from t1 where id2 <=> null or id2 > 0;
id	id2
1	1
select * from t1 where id2 is null or id2 > 0;
id	id2
1	1
delete from t1 where id <=> NULL;
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	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	#	100.00	NULL
1	SIMPLE	t2	NULL	ALL	idx	NULL	NULL	NULL	#	100.00	Using where; Using join buffer (Block Nested Loop)
1	SIMPLE	t3	NULL	ref	idx	idx	5	test.t2.b	#	100.00	Using index
Warnings:
Warning	1287	SQL_CALC_FOUND_ROWS is deprecated and will be removed in a future release. Consider using two separate queries instead.
Note	1003	/* select#1 */ select sql_calc_found_rows `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`b` AS `b` from `test`.`t1` left join `test`.`t2` on((`test`.`t2`.`a` = `test`.`t1`.`a`)) left join `test`.`t3` on((`test`.`t3`.`b` = `test`.`t2`.`b`)) where true
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
3	3	1	NULL
2	NULL	NULL	NULL
4	NULL	NULL	NULL
Warnings:
Warning	1287	SQL_CALC_FOUND_ROWS is deprecated and will be removed in a future release. Consider using two separate queries instead.
SELECT FOUND_ROWS();
FOUND_ROWS()
4
Warnings:
Warning	1287	FOUND_ROWS() is deprecated and will be removed in a future release. Consider using COUNT(*) instead.
SHOW STATUS LIKE "handler_read%";
Variable_name	Value
Handler_read_first	2
Handler_read_key	4
Handler_read_last	0
Handler_read_next	0
Handler_read_prev	0
Handler_read_rnd	0
Handler_read_rnd_next	8
DROP TABLE t1,t2,t3,t4;
CREATE TABLE t1 (
a int(11) default NULL,
b int(11) default NULL,
KEY a (a,b)
);
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t1 VALUES (0,10),(0,11),(0,12);
CREATE TABLE t2 (
a int(11) default NULL,
b int(11) default NULL,
KEY a (a)
);
Warnings:
Warning	1681	Integer display width is deprecated and will be removed in a future release.
Warning	1681	Integer display width is deprecated and will be removed in a future release.
INSERT INTO t2 VALUES (3,NULL),(3,11),(3,12);
SELECT * FROM t2 inner join t1 WHERE ( t1.a = 0 OR t1.a IS NULL) AND t2.a = 3 AND t2.b = t1.b;
a	b	a	b
3	11	0	11
3	12	0	12
drop table t1, t2;
End of 5.0 tests
#
# Bug#54608 Query using IN + OR + IS TRUE and IS NULL returns
# NULL when should be empty
#
CREATE TABLE t1 (a INT, KEY (a));
INSERT INTO t1 VALUES (1), (2), (NULL);
explain SELECT a FROM t1 WHERE a IN (42) OR (a IS TRUE AND a IS NULL);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ref_or_null	a	a	5	const	2	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where ((`test`.`t1`.`a` = 42) or (((0 <> `test`.`t1`.`a`) is true) and (`test`.`t1`.`a` is null)))
SELECT a FROM t1 WHERE a IN (42) OR (a IS TRUE AND a IS NULL);
a
explain SELECT a FROM t1 WHERE a IN (42) OR (a=NULL);
id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	t1	NULL	ref_or_null	a	a	5	const	#	100.00	Using where; Using index
Warnings:
Note	1003	/* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where ((`test`.`t1`.`a` = 42) or (`test`.`t1`.`a` = NULL))
SELECT a FROM t1 WHERE a IN (42) OR (a=NULL);
a
drop table t1;
SET sql_mode = default;
set optimizer_switch=default;