# Bug mdev-12812: mergeable derived / view with subqueries
# NOT subject to semi-join optimizations
#
CREATE TABLE t1 (c1 varchar(3)) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('foo'),('foo');
CREATE TABLE t2 (c2 varchar(3)) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('bar'),('qux'),('foo');
SELECT STRAIGHT_JOIN *
FROM ( SELECT * FROM t1 WHERE c1 IN ( SELECT c2 FROM t2 ) ) AS sq;
c1
foo
foo
EXPLAIN EXTENDED SELECT STRAIGHT_JOIN *
FROM ( SELECT * FROM t1 WHERE c1 IN ( SELECT c2 FROM t2 ) ) AS sq;
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where
3 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select straight_join `test`.`t1`.`c1` AS `c1` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`c1`,<exists>(select `test`.`t2`.`c2` from `test`.`t2` where (<cache>(`test`.`t1`.`c1`) = `test`.`t2`.`c2`)))
@@ -3101,4 +3101,58 @@ id select_type table type possible_keys key key_len ref rows Extra
...
@@ -3101,4 +3101,58 @@ id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 range idx idx 5 NULL 2 Using where; Using index; Using join buffer (flat, BNL join)
1 PRIMARY t2 range idx idx 5 NULL 2 Using where; Using index; Using join buffer (flat, BNL join)
drop table t1,t2;
drop table t1,t2;
set optimizer_switch= @tmp_mdev12675;
set optimizer_switch= @tmp_mdev12675;
#
# MDEV-12817: subquery NOT subject to semi-join optimizations
# in ON expression of INNER JOIN
#
CREATE TABLE t1 (c1 int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (c2 int) ENGINE=MyISAM;
INSERT INTO t2 VALUES (3),(4);
CREATE TABLE t3 (c3 int) ENGINE=MyISAM;
INSERT INTO t3 VALUES (5),(6);
CREATE TABLE t4 (c4 int) ENGINE=MyISAM;
INSERT INTO t4 VALUES (7),(8);
SELECT c1
FROM t1
LEFT JOIN
( t2 INNER JOIN t3 ON ( 1 IN ( SELECT c4 FROM t4 ) ) )
ON (c1 = c3);
c1
1
2
EXPLAIN EXTENDED SELECT c1
FROM t1
LEFT JOIN
( t2 INNER JOIN t3 ON ( 1 IN ( SELECT c4 FROM t4 ) ) )
ON (c1 = c3);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 100.00 Using where
2 SUBQUERY t4 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`c1` AS `c1` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(((`test`.`t3`.`c3` = `test`.`t1`.`c1`) and <cache>(<in_optimizer>(1,<exists>(select `test`.`t4`.`c4` from `test`.`t4` where (1 = `test`.`t4`.`c4`)))))) where 1
# mdev-12820
SELECT *
FROM t1
LEFT JOIN
( ( SELECT * FROM t2 WHERE c2 IN ( SELECT c3 FROM t3 ) ) AS sq INNER JOIN t4 )
ON (c1 = c2);
c1 c2 c4
1 NULL NULL
2 NULL NULL
EXPLAIN EXTENDED SELECT *
FROM t1
LEFT JOIN
( ( SELECT * FROM t2 WHERE c2 IN ( SELECT c3 FROM t3 ) ) AS sq INNER JOIN t4 )
ON (c1 = c2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where
1 PRIMARY t4 ALL NULL NULL NULL NULL 2 100.00
3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2`,`test`.`t4`.`c4` AS `c4` from `test`.`t1` left join (`test`.`t2` join `test`.`t4`) on(((`test`.`t2`.`c2` = `test`.`t1`.`c1`) and <in_optimizer>(`test`.`t1`.`c1`,<exists>(select `test`.`t3`.`c3` from `test`.`t3` where (<cache>(`test`.`t2`.`c2`) = `test`.`t3`.`c3`))))) where 1
@@ -3115,6 +3115,60 @@ id select_type table type possible_keys key key_len ref rows Extra
...
@@ -3115,6 +3115,60 @@ id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 range idx idx 5 NULL 2 Using where; Using index; Using join buffer (flat, BNL join)
1 PRIMARY t2 range idx idx 5 NULL 2 Using where; Using index; Using join buffer (flat, BNL join)
drop table t1,t2;
drop table t1,t2;
set optimizer_switch= @tmp_mdev12675;
set optimizer_switch= @tmp_mdev12675;
#
# MDEV-12817: subquery NOT subject to semi-join optimizations
# in ON expression of INNER JOIN
#
CREATE TABLE t1 (c1 int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (c2 int) ENGINE=MyISAM;
INSERT INTO t2 VALUES (3),(4);
CREATE TABLE t3 (c3 int) ENGINE=MyISAM;
INSERT INTO t3 VALUES (5),(6);
CREATE TABLE t4 (c4 int) ENGINE=MyISAM;
INSERT INTO t4 VALUES (7),(8);
SELECT c1
FROM t1
LEFT JOIN
( t2 INNER JOIN t3 ON ( 1 IN ( SELECT c4 FROM t4 ) ) )
ON (c1 = c3);
c1
1
2
EXPLAIN EXTENDED SELECT c1
FROM t1
LEFT JOIN
( t2 INNER JOIN t3 ON ( 1 IN ( SELECT c4 FROM t4 ) ) )
ON (c1 = c3);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
2 SUBQUERY t4 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`c1` AS `c1` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(((`test`.`t3`.`c3` = `test`.`t1`.`c1`) and <cache>(<in_optimizer>(1,<exists>(select `test`.`t4`.`c4` from `test`.`t4` where (1 = `test`.`t4`.`c4`)))))) where 1
# mdev-12820
SELECT *
FROM t1
LEFT JOIN
( ( SELECT * FROM t2 WHERE c2 IN ( SELECT c3 FROM t3 ) ) AS sq INNER JOIN t4 )
ON (c1 = c2);
c1 c2 c4
1 NULL NULL
2 NULL NULL
EXPLAIN EXTENDED SELECT *
FROM t1
LEFT JOIN
( ( SELECT * FROM t2 WHERE c2 IN ( SELECT c3 FROM t3 ) ) AS sq INNER JOIN t4 )
ON (c1 = c2);
id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
1 PRIMARY t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (incremental, BNL join)
3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Note 1003 select `test`.`t1`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2`,`test`.`t4`.`c4` AS `c4` from `test`.`t1` left join (`test`.`t2` join `test`.`t4`) on(((`test`.`t2`.`c2` = `test`.`t1`.`c1`) and <in_optimizer>(`test`.`t1`.`c1`,<exists>(select `test`.`t3`.`c3` from `test`.`t3` where (<cache>(`test`.`t2`.`c2`) = `test`.`t3`.`c3`))))) where 1
DROP TABLE t1,t2,t3,t4;
set optimizer_switch=@subselect_sj_tmp;
set optimizer_switch=@subselect_sj_tmp;
#
#
# BUG#49129: Wrong result with IN-subquery with join_cache_level=6 and firstmatch=off
# BUG#49129: Wrong result with IN-subquery with join_cache_level=6 and firstmatch=off