| Current Path : /home/usr.opt/mysql57/mysql-test/r/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //home/usr.opt/mysql57/mysql-test/r/join_nested_bka_nixbnl.result |
set optimizer_switch='batched_key_access=on,block_nested_loop=off,mrr_cost_based=off';
DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5,t6,t7,t8,t9;
CREATE TABLE t0 (a int, b int, c int);
CREATE TABLE t1 (a int, b int, c int);
CREATE TABLE t2 (a int, b int, c int);
CREATE TABLE t3 (a int, b int, c int);
CREATE TABLE t4 (a int, b int, c int);
CREATE TABLE t5 (a int, b int, c int);
CREATE TABLE t6 (a int, b int, c int);
CREATE TABLE t7 (a int, b int, c int);
CREATE TABLE t8 (a int, b int, c int);
CREATE TABLE t9 (a int, b int, c int);
INSERT INTO t0 VALUES (1,1,0), (1,2,0), (2,2,0);
INSERT INTO t1 VALUES (1,3,0), (2,2,0), (3,2,0);
INSERT INTO t2 VALUES (3,3,0), (4,2,0), (5,3,0);
INSERT INTO t3 VALUES (1,2,0), (2,2,0);
INSERT INTO t4 VALUES (3,2,0), (4,2,0);
INSERT INTO t5 VALUES (3,1,0), (2,2,0), (3,3,0);
INSERT INTO t6 VALUES (3,2,0), (6,2,0), (6,1,0);
INSERT INTO t7 VALUES (1,1,0), (2,2,0);
INSERT INTO t8 VALUES (0,2,0), (1,2,0);
INSERT INTO t9 VALUES (1,1,0), (1,2,0), (3,3,0);
CREATE TABLE t34 (a3 int, b3 int, c3 int, a4 int, b4 int, c4 int);
INSERT INTO t34
SELECT t3.*, t4.*
FROM t3 CROSS JOIN t4;
CREATE TABLE t345 (a3 int, b3 int, c3 int, a4 int, b4 int, c4 int,
a5 int, b5 int, c5 int);
INSERT INTO t345
SELECT t3.*, t4.*, t5.*
FROM t3 CROSS JOIN t4 CROSS JOIN t5;
CREATE TABLE t67 (a6 int, b6 int, c6 int, a7 int, b7 int, c7 int);
INSERT INTO t67
SELECT t6.*, t7.*
FROM t6 CROSS JOIN t7;
SELECT t2.a,t2.b
FROM t2;
a b
3 3
4 2
5 3
SELECT t3.a,t3.b
FROM t3;
a b
1 2
2 2
SELECT t4.a,t4.b
FROM t4;
a b
3 2
4 2
SELECT t3.a,t3.b,t4.a,t4.b
FROM t3,t4;
a b a b
1 2 3 2
1 2 4 2
2 2 3 2
2 2 4 2
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t2.b=t4.b;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
4 2 2 2 3 2
4 2 2 2 4 2
5 3 NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4
FROM t2
LEFT JOIN t34
ON t2.b=t34.b4;
a b a3 b3 a4 b4
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
4 2 2 2 3 2
4 2 2 2 4 2
5 3 NULL NULL NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4
FROM t2
LEFT JOIN t34
ON t34.a3=1 AND t2.b=t34.b4;
a b a3 b3 a4 b4
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t2.b=t4.b
WHERE t3.a=1 OR t3.c IS NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where ((`test`.`t3`.`a` = 1) or isnull(`test`.`t3`.`c`))
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t2.b=t4.b
WHERE t3.a=1 OR t3.c IS NULL;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4
FROM t2
LEFT JOIN t34
ON t2.b=t34.b4
WHERE t34.a3=1 OR t34.c3 IS NULL;
a b a3 b3 a4 b4
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t2.b=t4.b
WHERE t3.a>1 OR t3.c IS NULL;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 2 2 3 2
4 2 2 2 4 2
5 3 NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4
FROM t2
LEFT JOIN t34
ON t2.b=t34.b4
WHERE t34.a3>1 OR t34.c3 IS NULL;
a b a3 b3 a4 b4
3 3 NULL NULL NULL NULL
4 2 2 2 3 2
4 2 2 2 4 2
5 3 NULL NULL NULL NULL
SELECT t5.a,t5.b
FROM t5;
a b
3 1
2 2
3 3
SELECT t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t3,t4,t5;
a b a b a b
1 2 3 2 3 1
1 2 3 2 2 2
1 2 3 2 3 3
1 2 4 2 3 1
1 2 4 2 2 2
1 2 4 2 3 3
2 2 3 2 3 1
2 2 3 2 2 2
2 2 3 2 3 3
2 2 4 2 3 1
2 2 4 2 2 2
2 2 4 2 3 3
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN
(t3, t4, t5)
ON t2.b=t4.b;
a b a b a b a b
3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 3 2 2 2
4 2 1 2 3 2 3 1
4 2 1 2 3 2 3 3
4 2 1 2 4 2 2 2
4 2 1 2 4 2 3 1
4 2 1 2 4 2 3 3
4 2 2 2 3 2 2 2
4 2 2 2 3 2 3 1
4 2 2 2 3 2 3 3
4 2 2 2 4 2 2 2
4 2 2 2 4 2 3 1
4 2 2 2 4 2 3 3
5 3 NULL NULL NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t345.a3,t345.b3,t345.a4,t345.b4,t345.a5,t345.b5
FROM t2
LEFT JOIN t345
ON t2.b=t345.b4;
a b a3 b3 a4 b4 a5 b5
3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 3 2 2 2
4 2 1 2 3 2 3 1
4 2 1 2 3 2 3 3
4 2 1 2 4 2 2 2
4 2 1 2 4 2 3 1
4 2 1 2 4 2 3 3
4 2 2 2 3 2 2 2
4 2 2 2 3 2 3 1
4 2 2 2 3 2 3 3
4 2 2 2 4 2 2 2
4 2 2 2 4 2 3 1
4 2 2 2 4 2 3 3
5 3 NULL NULL NULL NULL NULL NULL
EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN
(t3, t4, t5)
ON t2.b=t4.b
WHERE t3.a>1 OR t3.c IS NULL;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t5 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where ((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`))
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN
(t3, t4, t5)
ON t2.b=t4.b
WHERE t3.a>1 OR t3.c IS NULL;
a b a b a b a b
3 3 NULL NULL NULL NULL NULL NULL
4 2 2 2 3 2 2 2
4 2 2 2 3 2 3 1
4 2 2 2 3 2 3 3
4 2 2 2 4 2 2 2
4 2 2 2 4 2 3 1
4 2 2 2 4 2 3 3
5 3 NULL NULL NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t345.a3,t345.b3,t345.a4,t345.b4,t345.a5,t345.b5
FROM t2
LEFT JOIN t345
ON t2.b=t345.b4
WHERE t345.a3>1 OR t345.c3 IS NULL;
a b a3 b3 a4 b4 a5 b5
3 3 NULL NULL NULL NULL NULL NULL
4 2 2 2 3 2 2 2
4 2 2 2 3 2 3 1
4 2 2 2 3 2 3 3
4 2 2 2 4 2 2 2
4 2 2 2 4 2 3 1
4 2 2 2 4 2 3 3
5 3 NULL NULL NULL NULL NULL NULL
EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN
(t3, t4, t5)
ON t2.b=t4.b
WHERE (t3.a>1 OR t3.c IS NULL) AND
(t5.a<3 OR t5.c IS NULL);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t5 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b` from `test`.`t2` left join (`test`.`t3` join `test`.`t4` join `test`.`t5`) on((`test`.`t4`.`b` = `test`.`t2`.`b`)) where (((`test`.`t3`.`a` > 1) or isnull(`test`.`t3`.`c`)) and ((`test`.`t5`.`a` < 3) or isnull(`test`.`t5`.`c`)))
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2
LEFT JOIN
(t3, t4, t5)
ON t2.b=t4.b
WHERE (t3.a>1 OR t3.c IS NULL) AND
(t5.a<3 OR t5.c IS NULL);
a b a b a b a b
3 3 NULL NULL NULL NULL NULL NULL
4 2 2 2 3 2 2 2
4 2 2 2 4 2 2 2
5 3 NULL NULL NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t345.a3,t345.b3,t345.a4,t345.b4,t345.a5,t345.b5
FROM t2
LEFT JOIN t345
ON t2.b=t345.b4
WHERE (t345.a3>1 OR t345.c3 IS NULL) AND
(t345.a5<3 OR t345.c5 IS NULL);
a b a3 b3 a4 b4 a5 b5
3 3 NULL NULL NULL NULL NULL NULL
4 2 2 2 3 2 2 2
4 2 2 2 4 2 2 2
5 3 NULL NULL NULL NULL NULL NULL
SELECT t6.a,t6.b
FROM t6;
a b
3 2
6 2
6 1
SELECT t7.a,t7.b
FROM t7;
a b
1 1
2 2
SELECT t6.a,t6.b,t7.a,t7.b
FROM t6,t7;
a b a b
3 2 1 1
6 2 1 1
6 1 1 1
3 2 2 2
6 2 2 2
6 1 2 2
SELECT t8.a,t8.b
FROM t8;
a b
0 2
1 2
EXPLAIN EXTENDED
SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM (t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t7 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
1 SIMPLE t8 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t7`.`b`) and (`test`.`t6`.`b` < 10))) where 1
SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM (t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10;
a b a b a b
3 2 1 1 NULL NULL
3 2 2 2 0 2
3 2 2 2 1 2
6 1 1 1 NULL NULL
6 1 2 2 0 2
6 1 2 2 1 2
6 2 1 1 NULL NULL
6 2 2 2 0 2
6 2 2 2 1 2
"Standard compliant copy of above query"
SELECT t67.a6,t67.b6,t67.a7,t67.b7,t8.a,t8.b
FROM t67
LEFT JOIN
t8
ON t67.b7=t8.b AND t67.b6 < 10;
a6 b6 a7 b7 a b
3 2 1 1 NULL NULL
3 2 2 2 0 2
3 2 2 2 1 2
6 1 1 1 NULL NULL
6 1 2 2 0 2
6 1 2 2 1 2
6 2 1 1 NULL NULL
6 2 2 2 0 2
6 2 2 2 1 2
SELECT t5.a,t5.b
FROM t5;
a b
3 1
2 2
3 3
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b;
a b a b a b a b
2 2 3 2 2 2 0 2
2 2 3 2 2 2 1 2
2 2 6 2 2 2 0 2
2 2 6 2 2 2 1 2
3 1 3 2 1 1 NULL NULL
3 1 6 2 1 1 NULL NULL
3 3 NULL NULL NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t5.a,t5.b,t67.a6,t67.b6,t67.a7,t67.b7,t8.a,t8.b
FROM t5
LEFT JOIN
(
t67
LEFT JOIN
t8
ON t67.b7=t8.b AND t67.b6 < 10
)
ON t67.b6 >= 2 AND t5.b=t67.b7;
a b a6 b6 a7 b7 a b
2 2 3 2 2 2 0 2
2 2 3 2 2 2 1 2
2 2 6 2 2 2 0 2
2 2 6 2 2 2 1 2
3 1 3 2 1 1 NULL NULL
3 1 6 2 1 1 NULL NULL
3 3 NULL NULL NULL NULL NULL NULL
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b AND
(t8.a < 1 OR t8.c IS NULL);
a b a b a b a b
2 2 3 2 2 2 0 2
2 2 6 2 2 2 0 2
3 1 3 2 1 1 NULL NULL
3 1 6 2 1 1 NULL NULL
3 3 NULL NULL NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t5.a,t5.b,t67.a6,t67.b6,t67.a7,t67.b7,t8.a,t8.b
FROM t5
LEFT JOIN
(
t67
LEFT JOIN
t8
ON t67.b7=t8.b AND t67.b6 < 10
)
ON t67.b6 >= 2 AND t5.b=t67.b7 AND
(t8.a < 1 OR t8.c IS NULL);
a b a6 b6 a7 b7 a b
2 2 3 2 2 2 0 2
2 2 6 2 2 2 0 2
3 1 3 2 1 1 NULL NULL
3 1 6 2 1 1 NULL NULL
3 3 NULL NULL NULL NULL NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4
FROM t2
LEFT JOIN t34
ON t34.a3=1 AND t2.b=t34.b4;
a b a3 b3 a4 b4
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b;
a b a b a b a b a b a b a b
3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 3 2 2 2 3 2 2 2 0 2
4 2 1 2 3 2 2 2 3 2 2 2 1 2
4 2 1 2 3 2 2 2 6 2 2 2 0 2
4 2 1 2 3 2 2 2 6 2 2 2 1 2
4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 4 2 2 2 3 2 2 2 0 2
4 2 1 2 4 2 2 2 3 2 2 2 1 2
4 2 1 2 4 2 2 2 6 2 2 2 0 2
4 2 1 2 4 2 2 2 6 2 2 2 1 2
4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4,
t5.a,t5.b,t67.a6,t67.b6,t67.a7,t67.b7,t8.a,t8.b
FROM t2
LEFT JOIN t34
ON t34.a3=1 AND t2.b=t34.b4
CROSS JOIN t5
LEFT JOIN
(
t67
LEFT JOIN
t8
ON t67.b7=t8.b AND t67.b6 < 10
)
ON t67.b6 >= 2 AND t5.b=t67.b7;
a b a3 b3 a4 b4 a b a6 b6 a7 b7 a b
3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 3 2 2 2 3 2 2 2 0 2
4 2 1 2 3 2 2 2 3 2 2 2 1 2
4 2 1 2 3 2 2 2 6 2 2 2 0 2
4 2 1 2 3 2 2 2 6 2 2 2 1 2
4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 4 2 2 2 3 2 2 2 0 2
4 2 1 2 4 2 2 2 3 2 2 2 1 2
4 2 1 2 4 2 2 2 6 2 2 2 0 2
4 2 1 2 4 2 2 2 6 2 2 2 1 2
4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
WHERE t2.a > 3 AND
(t6.a < 6 OR t6.c IS NULL);
a b a b a b a b a b a b a b
4 2 1 2 3 2 2 2 3 2 2 2 0 2
4 2 1 2 3 2 2 2 3 2 2 2 1 2
4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 4 2 2 2 3 2 2 2 0 2
4 2 1 2 4 2 2 2 3 2 2 2 1 2
4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4,
t5.a,t5.b,t67.a6,t67.b6,t67.a7,t67.b7,t8.a,t8.b
FROM t2
LEFT JOIN t34
ON t34.a3=1 AND t2.b=t34.b4
CROSS JOIN t5
LEFT JOIN
(
t67
LEFT JOIN
t8
ON t67.b7=t8.b AND t67.b6 < 10
)
ON t67.b6 >= 2 AND t5.b=t67.b7
WHERE t2.a > 3 AND
(t67.a6 < 6 OR t67.c6 IS NULL);
a b a3 b3 a4 b4 a b a6 b6 a7 b7 a b
4 2 1 2 3 2 2 2 3 2 2 2 0 2
4 2 1 2 3 2 2 2 3 2 2 2 1 2
4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
4 2 1 2 4 2 2 2 3 2 2 2 0 2
4 2 1 2 4 2 2 2 3 2 2 2 1 2
4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
SELECT t1.a,t1.b
FROM t1;
a b
1 3
2 2
3 2
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2);
a b a b a b a b a b a b a b a b
1 3 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 3 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 3 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 3 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 3 3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 3 3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 3 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
1 3 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
3 2 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 2 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 2 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 2 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 2 3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 2 3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 2 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t1.a,t1.b,t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4,
t5.a,t5.b,t67.a6,t67.b6,t67.a7,t67.b7,t8.a,t8.b
FROM t1
LEFT JOIN
(
t2
LEFT JOIN t34
ON t34.a3=1 AND t2.b=t34.b4
CROSS JOIN t5
LEFT JOIN
(
t67
LEFT JOIN
t8
ON t67.b7=t8.b AND t67.b6 < 10
)
ON t67.b6 >= 2 AND t5.b=t67.b7
)
ON (t34.b3=2 OR t34.c3 IS NULL) AND (t67.b6=2 OR t67.c6 IS NULL) AND
(t1.b=t5.b OR t34.c3 IS NULL OR t67.c6 IS NULL or t8.c IS NULL) AND
(t1.a <> 2);
a b a b a3 b3 a4 b4 a b a6 b6 a7 b7 a b
1 3 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 3 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 3 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 3 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 3 3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 3 3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 3 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
1 3 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
3 2 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 2 3 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 2 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 2 3 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 2 3 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 2 3 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 2 3 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2)
WHERE (t2.a >= 4 OR t2.c IS NULL);
a b a b a b a b a b a b a b a b
1 3 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t1.a,t1.b,t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4,
t5.a,t5.b,t67.a6,t67.b6,t67.a7,t67.b7,t8.a,t8.b
FROM t1
LEFT JOIN
(
t2
LEFT JOIN t34
ON t34.a3=1 AND t2.b=t34.b4
CROSS JOIN t5
LEFT JOIN
(
t67
LEFT JOIN
t8
ON t67.b7=t8.b AND t67.b6 < 10
)
ON t67.b6 >= 2 AND t5.b=t67.b7
)
ON (t34.b3=2 OR t34.c3 IS NULL) AND (t67.b6=2 OR t67.c6 IS NULL) AND
(t1.b=t5.b OR t34.c3 IS NULL OR t67.c6 IS NULL or t8.c IS NULL) AND
(t1.a <> 2)
WHERE (t2.a >= 4 OR t2.c IS NULL);
a b a b a3 b3 a4 b4 a b a6 b6 a7 b7 a b
1 3 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
1 3 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 3 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 3 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 3 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2
3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2
3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
SELECT t0.a,t0.b
FROM t0;
a b
1 1
1 2
2 2
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2)
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t5 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
1 SIMPLE t7 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t8 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) where ((`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)))
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2)
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL);
a b a b a b a b a b a b a b a b a b
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
1 2 3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2
1 2 3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2
1 2 3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
1 2 3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2
1 2 3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2
1 2 3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4,
t5.a,t5.b,t67.a6,t67.b6,t67.a7,t67.b7,t8.a,t8.b
FROM t0
CROSS JOIN t1
LEFT JOIN
(
t2
LEFT JOIN t34
ON t34.a3=1 AND t2.b=t34.b4
CROSS JOIN t5
LEFT JOIN
(
t67
LEFT JOIN
t8
ON t67.b7=t8.b AND t67.b6 < 10
)
ON t67.b6 >= 2 AND t5.b=t67.b7
)
ON (t34.b3=2 OR t34.c3 IS NULL) AND (t67.b6=2 OR t67.c6 IS NULL) AND
(t1.b=t5.b OR t34.c3 IS NULL OR t67.c6 IS NULL or t8.c IS NULL) AND
(t1.a <> 2)
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL);
a b a b a b a3 b3 a4 b4 a b a6 b6 a7 b7 a b
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
1 2 3 2 4 2 1 2 3 2 2 2 3 2 2 2 0 2
1 2 3 2 4 2 1 2 3 2 2 2 3 2 2 2 1 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 1 2
1 2 3 2 4 2 1 2 3 2 3 1 3 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL
1 2 3 2 4 2 1 2 4 2 2 2 3 2 2 2 0 2
1 2 3 2 4 2 1 2 4 2 2 2 3 2 2 2 1 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 1 2
1 2 3 2 4 2 1 2 4 2 3 1 3 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 0 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 3 2 2 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 3 2 1 1 NULL NULL
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t9 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t5 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t7 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t8 NULL ALL NULL NULL NULL NULL 2 56.25 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t8`.`b` = `test`.`t9`.`b`) or isnull(`test`.`t8`.`c`)))
SELECT t9.a,t9.b
FROM t9;
a b
1 1
1 2
3 3
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
a b a b a b a b a b a b a b a b a b a b
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 2
"Standard compliant copy of above query"
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4,
t5.a,t5.b,t67.a6,t67.b6,t67.a7,t67.b7,t8.a,t8.b,t9.a,t9.b
FROM t0
CROSS JOIN t1
LEFT JOIN
(
t2
LEFT JOIN t34
ON t34.a3=1 AND t2.b=t34.b4
CROSS JOIN t5
LEFT JOIN
(
t67
LEFT JOIN
t8
ON t67.b7=t8.b AND t67.b6 < 10
)
ON t67.b6 >= 2 AND t5.b=t67.b7
)
ON (t34.b3=2 OR t34.c3 IS NULL) AND (t67.b6=2 OR t67.c6 IS NULL) AND
(t1.b=t5.b OR t34.c3 IS NULL OR t67.c6 IS NULL or t8.c IS NULL) AND
(t1.a <> 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t34.a3 < 5 OR t34.c3 IS NULL) AND
(t34.b3=t34.b4 OR t34.c3 IS NULL OR t34.c4 IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t67.a6 >=4 OR t67.c6 IS NULL) AND
(t67.a7 <= 2 OR t67.c7 IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
a b a b a b a3 b3 a4 b4 a b a6 b6 a7 b7 a b a b
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 2
SELECT t1.a,t1.b
FROM t1;
a b
1 3
2 2
3 2
SELECT t2.a,t2.b
FROM t2;
a b
3 3
4 2
5 3
SELECT t3.a,t3.b
FROM t3;
a b
1 2
2 2
SELECT t2.a,t2.b,t3.a,t3.b
FROM t2
LEFT JOIN
t3
ON t2.b=t3.b;
a b a b
3 3 NULL NULL
4 2 1 2
4 2 2 2
5 3 NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b
FROM t1, t2
LEFT JOIN
t3
ON t2.b=t3.b
WHERE t1.a <= 2;
a b a b a b
1 3 3 3 NULL NULL
1 3 4 2 1 2
1 3 4 2 2 2
1 3 5 3 NULL NULL
2 2 3 3 NULL NULL
2 2 4 2 1 2
2 2 4 2 2 2
2 2 5 3 NULL NULL
"Standard compliant copy of above query"
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b
FROM t1
CROSS JOIN t2
LEFT JOIN
t3
ON t2.b=t3.b
WHERE t1.a <= 2;
a b a b a b
1 3 3 3 NULL NULL
1 3 4 2 1 2
1 3 4 2 2 2
1 3 5 3 NULL NULL
2 2 3 3 NULL NULL
2 2 4 2 1 2
2 2 4 2 2 2
2 2 5 3 NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b
FROM t1, t3
RIGHT JOIN
t2
ON t2.b=t3.b
WHERE t1.a <= 2;
a b a b a b
1 3 3 3 NULL NULL
1 3 4 2 1 2
1 3 4 2 2 2
1 3 5 3 NULL NULL
2 2 3 3 NULL NULL
2 2 4 2 1 2
2 2 4 2 2 2
2 2 5 3 NULL NULL
"Standard compliant copy of above query"
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b
FROM t1 CROSS JOIN
(
t3
RIGHT JOIN
t2
ON t2.b=t3.b
)
WHERE t1.a <= 2;
a b a b a b
1 3 3 3 NULL NULL
1 3 4 2 1 2
1 3 4 2 2 2
1 3 5 3 NULL NULL
2 2 3 3 NULL NULL
2 2 4 2 1 2
2 2 4 2 2 2
2 2 5 3 NULL NULL
SELECT t3.a,t3.b,t4.a,t4.b
FROM t3,t4;
a b a b
1 2 3 2
1 2 4 2
2 2 3 2
2 2 4 2
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2
LEFT JOIN
(t3 CROSS JOIN t4)
ON t3.a=1 AND t2.b=t4.b;
a b a b a b
3 3 NULL NULL NULL NULL
4 2 1 2 3 2
4 2 1 2 4 2
5 3 NULL NULL NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t1 CROSS JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b
)
WHERE t1.a <= 2;
a b a b a b a b
1 3 3 3 NULL NULL NULL NULL
1 3 4 2 1 2 3 2
1 3 4 2 1 2 4 2
1 3 5 3 NULL NULL NULL NULL
2 2 3 3 NULL NULL NULL NULL
2 2 4 2 1 2 3 2
2 2 4 2 1 2 4 2
2 2 5 3 NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t1 CROSS JOIN
(
t2
LEFT JOIN
(t3 CROSS JOIN t4)
ON t3.a=1 AND t2.b=t4.b
)
WHERE t1.a <= 2;
a b a b a b a b
1 3 3 3 NULL NULL NULL NULL
1 3 4 2 1 2 3 2
1 3 4 2 1 2 4 2
1 3 5 3 NULL NULL NULL NULL
2 2 3 3 NULL NULL NULL NULL
2 2 4 2 1 2 3 2
2 2 4 2 1 2 4 2
2 2 5 3 NULL NULL NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t1, (t3, t4)
RIGHT JOIN
t2
ON t3.a=1 AND t2.b=t4.b
WHERE t1.a <= 2;
a b a b a b a b
1 3 3 3 NULL NULL NULL NULL
1 3 4 2 1 2 3 2
1 3 4 2 1 2 4 2
1 3 5 3 NULL NULL NULL NULL
2 2 3 3 NULL NULL NULL NULL
2 2 4 2 1 2 3 2
2 2 4 2 1 2 4 2
2 2 5 3 NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t1 CROSS JOIN
(
(t3 CROSS JOIN t4)
RIGHT JOIN
t2
ON t3.a=1 AND t2.b=t4.b
)
WHERE t1.a <= 2;
a b a b a b a b
1 3 3 3 NULL NULL NULL NULL
1 3 4 2 1 2 3 2
1 3 4 2 1 2 4 2
1 3 5 3 NULL NULL NULL NULL
2 2 3 3 NULL NULL NULL NULL
2 2 4 2 1 2 3 2
2 2 4 2 1 2 4 2
2 2 5 3 NULL NULL NULL NULL
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t1, (t3, t4)
RIGHT JOIN
t2
ON t3.a=1 AND t2.b=t4.b
WHERE t1.a <= 2;
a b a b a b a b
1 3 3 3 NULL NULL NULL NULL
1 3 4 2 1 2 3 2
1 3 4 2 1 2 4 2
1 3 5 3 NULL NULL NULL NULL
2 2 3 3 NULL NULL NULL NULL
2 2 4 2 1 2 3 2
2 2 4 2 1 2 4 2
2 2 5 3 NULL NULL NULL NULL
"Standard compliant copy of above query"
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t1 CROSS JOIN
(
(t3 CROSS JOIN t4)
RIGHT JOIN
t2
ON t3.a=1 AND t2.b=t4.b
)
WHERE t1.a <= 2;
a b a b a b a b
1 3 3 3 NULL NULL NULL NULL
1 3 4 2 1 2 3 2
1 3 4 2 1 2 4 2
1 3 5 3 NULL NULL NULL NULL
2 2 3 3 NULL NULL NULL NULL
2 2 4 2 1 2 3 2
2 2 4 2 1 2 4 2
2 2 5 3 NULL NULL NULL NULL
EXPLAIN EXTENDED
SELECT t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t1, (t3, t4)
RIGHT JOIN
t2
ON t3.a=1 AND t2.b=t4.b
WHERE t1.a <= 2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) where (`test`.`t1`.`a` <= 2)
CREATE INDEX idx_b ON t2(b);
EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM (t3,t4)
LEFT JOIN
(t1,t2)
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t2 NULL ref idx_b idx_b 5 test.t3.b 2 100.00 Using where
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(((`test`.`t4`.`b` = `test`.`t3`.`b`) and (`test`.`t2`.`b` = `test`.`t3`.`b`) and (`test`.`t3`.`a` = 1))) where 1
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM (t3,t4)
LEFT JOIN
(t1,t2)
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b;
a b a b a b
4 2 1 2 3 2
4 2 1 2 3 2
4 2 1 2 3 2
4 2 1 2 4 2
4 2 1 2 4 2
4 2 1 2 4 2
NULL NULL 2 2 3 2
NULL NULL 2 2 4 2
"Standard compliant copy of above query"
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM (t3 CROSS JOIN t4)
LEFT JOIN
(t1 CROSS JOIN t2)
ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b;
a b a b a b
4 2 1 2 3 2
4 2 1 2 3 2
4 2 1 2 3 2
4 2 1 2 4 2
4 2 1 2 4 2
4 2 1 2 4 2
NULL NULL 2 2 3 2
NULL NULL 2 2 4 2
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t9 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 2 100.00 Using where
1 SIMPLE t5 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t7 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t8 NULL ALL NULL NULL NULL NULL 2 56.25 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t8`.`b` = `test`.`t9`.`b`) or isnull(`test`.`t8`.`c`)))
CREATE INDEX idx_b ON t4(b);
CREATE INDEX idx_b ON t5(b);
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t9 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t4 NULL ref idx_b idx_b 5 test.t2.b 2 100.00 Using where
1 SIMPLE t5 NULL ALL idx_b NULL NULL NULL 3 55.56 Using where
1 SIMPLE t7 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t8 NULL ALL NULL NULL NULL NULL 2 56.25 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t8`.`b` = `test`.`t9`.`b`) or isnull(`test`.`t8`.`c`)))
CREATE INDEX idx_b ON t8(b);
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t9 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t4 NULL ref idx_b idx_b 5 test.t2.b 2 100.00 Using where
1 SIMPLE t5 NULL ALL idx_b NULL NULL NULL 3 55.56 Using where
1 SIMPLE t7 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t8 NULL ref idx_b idx_b 5 test.t5.b 2 75.00 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t8`.`b` = `test`.`t9`.`b`) or isnull(`test`.`t8`.`c`)))
CREATE INDEX idx_b ON t1(b);
CREATE INDEX idx_a ON t0(a);
EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 NULL ref idx_a idx_a 5 const 1 100.00 Using where
1 SIMPLE t9 NULL ALL NULL NULL NULL NULL 3 33.33 Using where
1 SIMPLE t1 NULL ref idx_b idx_b 5 test.t0.b 2 100.00 Using join buffer (Batched Key Access)
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t4 NULL ref idx_b idx_b 5 test.t2.b 2 100.00 Using where
1 SIMPLE t5 NULL ALL idx_b NULL NULL NULL 3 55.56 Using where
1 SIMPLE t7 NULL ALL NULL NULL NULL NULL 2 75.00 Using where
1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 3 55.56 Using where
1 SIMPLE t8 NULL ref idx_b idx_b 5 test.t5.b 2 75.00 Using where
Warnings:
Warning 1681 'EXTENDED' is deprecated and will be removed in a future release.
Note 1003 /* select#1 */ select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(((`test`.`t4`.`b` = `test`.`t2`.`b`) and (`test`.`t3`.`a` = 1))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and ((`test`.`t5`.`b` = `test`.`t0`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t6`.`c`) or isnull(`test`.`t8`.`c`)) and (`test`.`t1`.`a` <> 2))) join `test`.`t9` where ((`test`.`t9`.`a` = 1) and (`test`.`t1`.`b` = `test`.`t0`.`b`) and (`test`.`t0`.`a` = 1) and ((`test`.`t2`.`a` >= 4) or isnull(`test`.`t2`.`c`)) and ((`test`.`t3`.`a` < 5) or isnull(`test`.`t3`.`c`)) and ((`test`.`t4`.`b` = `test`.`t3`.`b`) or isnull(`test`.`t3`.`c`) or isnull(`test`.`t4`.`c`)) and ((`test`.`t5`.`a` >= 2) or isnull(`test`.`t5`.`c`)) and ((`test`.`t6`.`a` >= 4) or isnull(`test`.`t6`.`c`)) and ((`test`.`t7`.`a` <= 2) or isnull(`test`.`t7`.`c`)) and ((`test`.`t8`.`a` < 1) or isnull(`test`.`t8`.`c`)) and ((`test`.`t8`.`b` = `test`.`t9`.`b`) or isnull(`test`.`t8`.`c`)))
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1
LEFT JOIN
(
t2
LEFT JOIN
(t3, t4)
ON t3.a=1 AND t2.b=t4.b,
t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b
)
ON (t3.b=2 OR t3.c IS NULL) AND (t6.b=2 OR t6.c IS NULL) AND
(t1.b=t5.b OR t3.c IS NULL OR t6.c IS NULL or t8.c IS NULL) AND
(t1.a != 2),
t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t3.a < 5 OR t3.c IS NULL) AND
(t3.b=t4.b OR t3.c IS NULL OR t4.c IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t6.a >=4 OR t6.c IS NULL) AND
(t7.a <= 2 OR t7.c IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
a b a b a b a b a b a b a b a b a b a b
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 2
"Standard compliant copy of above query"
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t34.a3,t34.b3,t34.a4,t34.b4,
t5.a,t5.b,t67.a6,t67.b6,t67.a7,t67.b7,t8.a,t8.b,t9.a,t9.b
FROM t0
CROSS JOIN t1
LEFT JOIN
(
t2
LEFT JOIN
t34
ON t34.a3=1 AND t2.b=t34.b4
CROSS JOIN t5
LEFT JOIN
(
t67
LEFT JOIN
t8
ON t67.b7=t8.b AND t67.b6 < 10
)
ON t67.b6 >= 2 AND t5.b=t67.b7
)
ON (t34.b3=2 OR t34.c3 IS NULL) AND (t67.b6=2 OR t67.c6 IS NULL) AND
(t1.b=t5.b OR t34.c3 IS NULL OR t67.c6 IS NULL or t8.c IS NULL) AND
(t1.a <> 2)
CROSS JOIN t9
WHERE t0.a=1 AND
t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL) AND
(t34.a3 < 5 OR t34.c3 IS NULL) AND
(t34.b3=t34.b4 OR t34.c3 IS NULL OR t34.c4 IS NULL) AND
(t5.a >=2 OR t5.c IS NULL) AND
(t67.a6 >=4 OR t67.c6 IS NULL) AND
(t67.a7 <= 2 OR t67.c7 IS NULL) AND
(t8.a < 1 OR t8.c IS NULL) AND
(t8.b=t9.b OR t8.c IS NULL) AND
(t9.a=1);
a b a b a b a3 b3 a4 b4 a b a6 b6 a7 b7 a b a b
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 1
1 2 2 2 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 3 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 2 2 6 2 2 2 0 2 1 2
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 4 2 1 2 4 2 3 3 NULL NULL NULL NULL NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 2 2 6 2 2 2 0 2 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 1 6 2 1 1 NULL NULL 1 2
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 1
1 2 3 2 5 3 NULL NULL NULL NULL 3 3 NULL NULL NULL NULL NULL NULL 1 2
SELECT t2.a,t2.b
FROM t2;
a b
3 3
4 2
5 3
SELECT t3.a,t3.b
FROM t3;
a b
1 2
2 2
SELECT t2.a,t2.b,t3.a,t3.b
FROM t2 LEFT JOIN t3 ON t2.b=t3.b
WHERE t2.a = 4 OR (t2.a > 4 AND t3.a IS NULL);
a b a b
4 2 1 2
4 2 2 2
5 3 NULL NULL
SELECT t2.a,t2.b,t3.a,t3.b
FROM t2 LEFT JOIN (t3) ON t2.b=t3.b
WHERE t2.a = 4 OR (t2.a > 4 AND t3.a IS NULL);
a b a b
4 2 1 2
4 2 2 2
5 3 NULL NULL
ALTER TABLE t3
CHANGE COLUMN a a1 int,
CHANGE COLUMN c c1 int;
SELECT t2.a,t2.b,t3.a1,t3.b
FROM t2 LEFT JOIN t3 ON t2.b=t3.b
WHERE t2.a = 4 OR (t2.a > 4 AND t3.a1 IS NULL);
a b a1 b
4 2 1 2
4 2 2 2
5 3 NULL NULL
SELECT t2.a,t2.b,t3.a1,t3.b
FROM t2 NATURAL LEFT JOIN t3
WHERE t2.a = 4 OR (t2.a > 4 AND t3.a1 IS NULL);
a b a1 b
4 2 1 2
4 2 2 2
5 3 NULL NULL
DROP TABLE t0,t1,t2,t3,t4,t5,t6,t7,t8,t9;
DROP TABLE t34, t345, t67;
CREATE TABLE t1 (a int);
CREATE TABLE t2 (a int);
CREATE TABLE t3 (a int);
INSERT INTO t1 VALUES (1);
INSERT INTO t2 VALUES (2);
INSERT INTO t3 VALUES (2);
INSERT INTO t1 VALUES (2);
SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON t2.a=t3.a) ON t1.a=t3.a;
a a a
1 NULL NULL
2 2 2
SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a;
a a a
1 NULL NULL
2 2 2
DELETE FROM t1 WHERE a=2;
SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a;
a a a
1 NULL NULL
DELETE FROM t2;
SELECT * FROM t1 LEFT JOIN t2 LEFT JOIN t3 ON t2.a=t3.a ON t1.a=t3.a;
a a a
1 NULL NULL
DROP TABLE t1,t2,t3;
CREATE TABLE t1(a int, key (a));
CREATE TABLE t2(b int, key (b));
CREATE TABLE t3(c int, key (c));
INSERT INTO t1 VALUES (NULL), (0), (1), (2), (3), (4), (5), (6), (7), (8), (9),
(10), (11), (12), (13), (14), (15), (16), (17), (18), (19);
INSERT INTO t2 VALUES (NULL), (0), (1), (2), (3), (4), (5), (6), (7), (8), (9),
(10), (11), (12), (13), (14), (15), (16), (17), (18), (19);
INSERT INTO t3 VALUES (0), (1), (2), (3), (4), (5);
EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON c < 3 and b = c;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index NULL a 5 NULL 21 100.00 Using index
1 SIMPLE t3 NULL index c c 5 NULL 6 100.00 Using where; Using index
1 SIMPLE t2 NULL ref b b 5 test.t3.c 2 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`c` AS `c` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(((`test`.`t2`.`b` = `test`.`t3`.`c`) and (`test`.`t3`.`c` < 3))) where 1
EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index NULL a 5 NULL 21 100.00 Using index
1 SIMPLE t3 NULL index c c 5 NULL 6 100.00 Using where; Using index
1 SIMPLE t2 NULL ref b b 5 test.t3.c 2 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`c` AS `c` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(((`test`.`t2`.`b` = `test`.`t3`.`c`) and (`test`.`t3`.`c` < 3))) where 1
SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
a b c
NULL 0 0
NULL 1 1
NULL 2 2
0 0 0
0 1 1
0 2 2
1 0 0
1 1 1
1 2 2
2 0 0
2 1 1
2 2 2
3 0 0
3 1 1
3 2 2
4 0 0
4 1 1
4 2 2
5 0 0
5 1 1
5 2 2
6 0 0
6 1 1
6 2 2
7 0 0
7 1 1
7 2 2
8 0 0
8 1 1
8 2 2
9 0 0
9 1 1
9 2 2
10 0 0
10 1 1
10 2 2
11 0 0
11 1 1
11 2 2
12 0 0
12 1 1
12 2 2
13 0 0
13 1 1
13 2 2
14 0 0
14 1 1
14 2 2
15 0 0
15 1 1
15 2 2
16 0 0
16 1 1
16 2 2
17 0 0
17 1 1
17 2 2
18 0 0
18 1 1
18 2 2
19 0 0
19 1 1
19 2 2
DELETE FROM t3;
EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index NULL a 5 NULL 21 100.00 Using index
1 SIMPLE t3 NULL index c c 5 NULL 0 0.00 Using where; Using index
1 SIMPLE t2 NULL ref b b 5 test.t3.c 2 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`c` AS `c` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(((`test`.`t2`.`b` = `test`.`t3`.`c`) and (`test`.`t3`.`c` < 3))) where 1
SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
a b c
NULL NULL NULL
0 NULL NULL
1 NULL NULL
2 NULL NULL
3 NULL NULL
4 NULL NULL
5 NULL NULL
6 NULL NULL
7 NULL NULL
8 NULL NULL
9 NULL NULL
10 NULL NULL
11 NULL NULL
12 NULL NULL
13 NULL NULL
14 NULL NULL
15 NULL NULL
16 NULL NULL
17 NULL NULL
18 NULL NULL
19 NULL NULL
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (c11 int);
CREATE TABLE t2 (c21 int);
CREATE TABLE t3 (c31 int);
INSERT INTO t1 VALUES (4), (5);
SELECT * FROM t1 LEFT JOIN t2 ON c11=c21;
c11 c21
4 NULL
5 NULL
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON c11=c21;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL system NULL NULL NULL NULL 0 0.00 const row not found
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`c11` AS `c11`,NULL AS `c21` from `test`.`t1` where 1
SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21;
c11 c21 c31
4 NULL NULL
5 NULL NULL
EXPLAIN SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 0 0.00 Using where
1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 0 0.00 Using where
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`c11` AS `c11`,`test`.`t2`.`c21` AS `c21`,`test`.`t3`.`c31` AS `c31` from `test`.`t1` left join (`test`.`t2` left join `test`.`t3` on((`test`.`t3`.`c31` = `test`.`t1`.`c11`))) on((`test`.`t2`.`c21` = `test`.`t1`.`c11`)) where 1
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (goods int(12) NOT NULL, price varchar(128) NOT NULL);
INSERT INTO t1 VALUES (23, 2340), (26, 9900);
CREATE TABLE t2 (goods int(12), name varchar(50), shop char(2));
INSERT INTO t2 VALUES (23, 'as300', 'fr'), (26, 'as600', 'fr');
create table t3 (groupid int(12) NOT NULL, goodsid int(12) NOT NULL);
INSERT INTO t3 VALUES (3,23), (6,26);
CREATE TABLE t4 (groupid int(12));
INSERT INTO t4 VALUES (1), (2), (3), (4), (5), (6);
SELECT * FROM
(SELECT DISTINCT gl.groupid, gp.price
FROM t4 gl
LEFT JOIN
(t3 g INNER JOIN t2 p ON g.goodsid = p.goods
INNER JOIN t1 gp ON p.goods = gp.goods)
ON gl.groupid = g.groupid and p.shop = 'fr') t;
groupid price
1 NULL
2 NULL
3 2340
4 NULL
5 NULL
6 9900
CREATE VIEW v1 AS
SELECT g.groupid groupid, p.goods goods,
p.name name, p.shop shop,
gp.price price
FROM t3 g INNER JOIN t2 p ON g.goodsid = p.goods
INNER JOIN t1 gp on p.goods = gp.goods;
CREATE VIEW v2 AS
SELECT DISTINCT g.groupid, fr.price
FROM t4 g
LEFT JOIN
v1 fr on g.groupid = fr.groupid and fr.shop = 'fr';
SELECT * FROM v2;
groupid price
1 NULL
2 NULL
3 2340
4 NULL
5 NULL
6 9900
SELECT * FROM
(SELECT DISTINCT g.groupid, fr.price
FROM t4 g
LEFT JOIN
v1 fr on g.groupid = fr.groupid and fr.shop = 'fr') t;
groupid price
1 NULL
2 NULL
3 2340
4 NULL
5 NULL
6 9900
DROP VIEW v1,v2;
DROP TABLE t1,t2,t3,t4;
CREATE TABLE t1(a int);
CREATE TABLE t2(b int);
CREATE TABLE t3(c int, d int);
CREATE TABLE t4(d int);
CREATE TABLE t5(e int, f int);
CREATE TABLE t6(f int);
CREATE VIEW v1 AS
SELECT e FROM t5 JOIN t6 ON t5.e=t6.f;
CREATE VIEW v2 AS
SELECT e FROM t5 NATURAL JOIN t6;
SELECT t1.a FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c JOIN t4 USING(d);
a
SELECT t1.x FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c JOIN t4 USING(d);
ERROR 42S22: Unknown column 't1.x' in 'field list'
SELECT t1.a FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c NATURAL JOIN t4;
a
SELECT t1.x FROM t1 JOIN t2 ON a=b JOIN t3 ON a=c NATURAL JOIN t4;
ERROR 42S22: Unknown column 't1.x' in 'field list'
SELECT v1.e FROM v1 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d);
e
SELECT v1.x FROM v1 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d);
ERROR 42S22: Unknown column 'v1.x' in 'field list'
SELECT v2.e FROM v2 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d);
e
SELECT v2.x FROM v2 JOIN t2 ON e=b JOIN t3 ON e=c JOIN t4 USING(d);
ERROR 42S22: Unknown column 'v2.x' in 'field list'
DROP VIEW v1, v2;
DROP TABLE t1, t2, t3, t4, t5, t6;
create table t1 (id1 int(11) not null);
insert into t1 values (1),(2);
create table t2 (id2 int(11) not null);
insert into t2 values (1),(2),(3),(4);
create table t3 (id3 char(16) not null);
insert into t3 values ('100');
create table t4 (id2 int(11) not null, id3 char(16));
create table t5 (id1 int(11) not null, key (id1));
insert into t5 values (1),(2),(1);
create view v1 as
select t4.id3 from t4 join t2 on t4.id2 = t2.id2;
select t1.id1 from t1 inner join (t3 left join v1 on t3.id3 = v1.id3);
id1
1
2
drop view v1;
drop table t1, t2, t3, t4, t5;
create table t0 (a int);
insert into t0 values (0),(1),(2),(3);
create table t1(a int);
insert into t1 select A.a + 10*(B.a) from t0 A, t0 B;
create table t2 (a int, b int);
insert into t2 values (1,1), (2,2), (3,3);
create table t3(a int, b int, filler char(200), key(a));
insert into t3 select a,a,'filler' from t1;
insert into t3 select a,a,'filler' from t1;
create table t4 like t3;
insert into t4 select * from t3;
insert into t4 select * from t3;
create table t5 like t4;
insert into t5 select * from t4;
insert into t5 select * from t4;
create table t6 like t5;
insert into t6 select * from t5;
insert into t6 select * from t5;
create table t7 like t6;
insert into t7 select * from t6;
insert into t7 select * from t6;
explain select * from t4 join
t2 left join (t3 join t5 on t5.a=t3.b) on t3.a=t2.b where t4.a<=>t3.b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL X 100.00 NULL
1 SIMPLE t3 NULL ref a a 5 test.t2.b X 100.00 Using join buffer (Batched Key Access)
1 SIMPLE t5 NULL ref a a 5 test.t3.b X 100.00 Using join buffer (Batched Key Access)
1 SIMPLE t4 NULL ref a a 5 test.t3.b X 100.00 Using index condition; Using join buffer (Batched Key Access)
Warnings:
Note 1003 /* select#1 */ select `test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t4`.`filler` AS `filler`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t3`.`filler` AS `filler`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t5`.`filler` AS `filler` from `test`.`t4` join `test`.`t2` left join (`test`.`t3` join `test`.`t5`) on(((`test`.`t5`.`a` = `test`.`t3`.`b`) and (`test`.`t3`.`a` = `test`.`t2`.`b`))) where (`test`.`t4`.`a` <=> `test`.`t3`.`b`)
explain select * from (t4 join t6 on t6.a=t4.b) right join t3 on t4.a=t3.b
join t2 left join (t5 join t7 on t7.a=t5.b) on t5.a=t2.b where t3.a<=>t2.b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL X 100.00 NULL
1 SIMPLE t3 NULL ref a a 5 test.t2.b X 100.00 Using index condition; Using join buffer (Batched Key Access)
1 SIMPLE t4 NULL ref a a 5 test.t3.b X 100.00 Using join buffer (Batched Key Access)
1 SIMPLE t6 NULL ref a a 5 test.t4.b X 100.00 Using join buffer (Batched Key Access)
1 SIMPLE t5 NULL ref a a 5 test.t2.b X 100.00 Using join buffer (Batched Key Access)
1 SIMPLE t7 NULL ref a a 5 test.t5.b X 100.00 Using join buffer (Batched Key Access)
Warnings:
Note 1003 /* select#1 */ select `test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t4`.`filler` AS `filler`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t6`.`filler` AS `filler`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t3`.`filler` AS `filler`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t5`.`filler` AS `filler`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t7`.`filler` AS `filler` from `test`.`t3` left join (`test`.`t4` join `test`.`t6`) on(((`test`.`t6`.`a` = `test`.`t4`.`b`) and (`test`.`t4`.`a` = `test`.`t3`.`b`))) join `test`.`t2` left join (`test`.`t5` join `test`.`t7`) on(((`test`.`t7`.`a` = `test`.`t5`.`b`) and (`test`.`t5`.`a` = `test`.`t2`.`b`))) where (`test`.`t3`.`a` <=> `test`.`t2`.`b`)
explain select * from t2 left join
(t3 left join (t4 join t6 on t6.a=t4.b) on t4.a=t3.b
join t5 on t5.a=t3.b) on t3.a=t2.b;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL ALL NULL NULL NULL NULL X 100.00 NULL
1 SIMPLE t3 NULL ref a a 5 test.t2.b X 100.00 Using join buffer (Batched Key Access)
1 SIMPLE t5 NULL ref a a 5 test.t3.b X 100.00 Using join buffer (Batched Key Access)
1 SIMPLE t4 NULL ref a a 5 test.t5.a X 100.00 Using where; Using join buffer (Batched Key Access)
1 SIMPLE t6 NULL ref a a 5 test.t4.b X 100.00 Using join buffer (Batched Key Access)
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t3`.`filler` AS `filler`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t4`.`filler` AS `filler`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t6`.`filler` AS `filler`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t5`.`filler` AS `filler` from `test`.`t2` left join (`test`.`t3` left join (`test`.`t4` join `test`.`t6`) on(((`test`.`t6`.`a` = `test`.`t4`.`b`) and (`test`.`t4`.`a` = `test`.`t3`.`b`))) join `test`.`t5`) on(((`test`.`t5`.`a` = `test`.`t3`.`b`) and (`test`.`t3`.`a` = `test`.`t2`.`b`))) where 1
drop table t0, t1, t2, t3, t4, t5, t6, t7;
create table t1 (a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (a int, filler char(100), key(a));
insert into t2 select A.a + 10*B.a, '' from t1 A, t1 B;
create table t3 like t2;
insert into t3 select * from t2;
explain select * from t1 left join
(t2 left join t3 on (t2.a = t3.a))
on (t1.a = t2.a);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 10 100.00 NULL
1 SIMPLE t2 NULL ref a a 5 test.t1.a 1 100.00 Using join buffer (Batched Key Access)
1 SIMPLE t3 NULL ref a a 5 test.t1.a 1 100.00 Using join buffer (Batched Key Access)
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`filler` AS `filler`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`filler` AS `filler` from `test`.`t1` left join (`test`.`t2` left join `test`.`t3` on((`test`.`t3`.`a` = `test`.`t1`.`a`))) on((`test`.`t2`.`a` = `test`.`t1`.`a`)) where 1
drop table t1, t2, t3;
CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, type varchar(10));
CREATE TABLE t2 (pid int NOT NULL PRIMARY KEY, type varchar(10));
CREATE TABLE t3 (cid int NOT NULL PRIMARY KEY,
id int NOT NULL,
pid int NOT NULL);
INSERT INTO t1 VALUES (1, 'A'), (3, 'C');
INSERT INTO t2 VALUES (1, 'A'), (3, 'C');
INSERT INTO t3 VALUES (1, 1, 1), (3, 3, 3);
SELECT * FROM t1 p LEFT JOIN (t3 JOIN t1)
ON (t1.id=t3.id AND t1.type='B' AND p.id=t3.id)
LEFT JOIN t2 ON (t3.pid=t2.pid)
WHERE p.id=1;
id type cid id pid id type pid type
1 A NULL NULL NULL NULL NULL NULL NULL
CREATE VIEW v1 AS
SELECT t3.* FROM t3 JOIN t1 ON t1.id=t3.id AND t1.type='B';
SELECT * FROM t1 p LEFT JOIN v1 ON p.id=v1.id
LEFT JOIN t2 ON v1.pid=t2.pid
WHERE p.id=1;
id type cid id pid pid type
1 A NULL NULL NULL NULL NULL
DROP VIEW v1;
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (id1 int PRIMARY KEY, id2 int);
CREATE TABLE t2 (id1 int PRIMARY KEY, id2 int);
CREATE TABLE t3 (id1 int PRIMARY KEY, id2 int);
CREATE TABLE t4 (id1 int PRIMARY KEY, id2 int);
CREATE TABLE t5 (id1 int PRIMARY KEY, id2 int);
SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa
FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1
LEFT OUTER JOIN
(t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1)
ON t3.id2 IS NOT NULL
WHERE t1.id1=2;
id ngroupbynsa
PREPARE stmt FROM
"SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa
FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1
LEFT OUTER JOIN
(t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1)
ON t3.id2 IS NOT NULL
WHERE t1.id1=2";
EXECUTE stmt;
id ngroupbynsa
EXECUTE stmt;
id ngroupbynsa
EXECUTE stmt;
id ngroupbynsa
EXECUTE stmt;
id ngroupbynsa
INSERT INTO t1 VALUES (1,1), (2,1), (3,2);
INSERT INTO t2 VALUES (2,1), (3,2), (4,3);
INSERT INTO t3 VALUES (1,1), (3,2), (2,NULL);
INSERT INTO t4 VALUES (1,1), (2,1), (3,3);
INSERT INTO t5 VALUES (1,1), (2,2), (3,3), (4,3);
EXECUTE stmt;
id ngroupbynsa
2 1
2 1
EXECUTE stmt;
id ngroupbynsa
2 1
2 1
EXECUTE stmt;
id ngroupbynsa
2 1
2 1
EXECUTE stmt;
id ngroupbynsa
2 1
2 1
SELECT t1.id1 AS id, t5.id1 AS ngroupbynsa
FROM t1 INNER JOIN t2 ON t2.id2 = t1.id1
LEFT OUTER JOIN
(t3 INNER JOIN t4 ON t4.id1 = t3.id2 INNER JOIN t5 ON t4.id2 = t5.id1)
ON t3.id2 IS NOT NULL
WHERE t1.id1=2;
id ngroupbynsa
2 1
2 1
DROP TABLE t1,t2,t3,t4,t5;
CREATE TABLE t1 (
id int NOT NULL PRIMARY KEY,
ct int DEFAULT NULL,
pc int DEFAULT NULL,
INDEX idx_ct (ct),
INDEX idx_pc (pc)
);
INSERT INTO t1 VALUES
(1,NULL,NULL),(2,NULL,NULL),(3,NULL,NULL),(4,NULL,NULL),(5,NULL,NULL);
CREATE TABLE t2 (
id int NOT NULL PRIMARY KEY,
sr int NOT NULL,
nm varchar(255) NOT NULL,
INDEX idx_sr (sr)
);
INSERT INTO t2 VALUES
(2441905,4308,'LesAbymes'),(2441906,4308,'Anse-Bertrand');
CREATE TABLE t3 (
id int NOT NULL PRIMARY KEY,
ct int NOT NULL,
ln int NOT NULL,
INDEX idx_ct (ct),
INDEX idx_ln (ln)
);
CREATE TABLE t4 (
id int NOT NULL PRIMARY KEY,
nm varchar(255) NOT NULL
);
INSERT INTO t4 VALUES (4308,'Guadeloupe'),(4309,'Martinique');
SELECT t1.*
FROM t1 LEFT JOIN
(t2 LEFT JOIN t3 ON t3.ct=t2.id AND t3.ln='5') ON t1.ct=t2.id
WHERE t1.id='5';
id ct pc
5 NULL NULL
SELECT t1.*, t4.nm
FROM t1 LEFT JOIN
(t2 LEFT JOIN t3 ON t3.ct=t2.id AND t3.ln='5') ON t1.ct=t2.id
LEFT JOIN t4 ON t2.sr=t4.id
WHERE t1.id='5';
id ct pc nm
5 NULL NULL NULL
DROP TABLE t1,t2,t3,t4;
CREATE TABLE t1 (a INT, b INT);
CREATE TABLE t2 (a INT);
CREATE TABLE t3 (a INT, c INT);
CREATE TABLE t4 (a INT, c INT);
CREATE TABLE t5 (a INT, c INT);
SELECT b FROM t1 JOIN (t2 LEFT JOIN t3 USING (a) LEFT JOIN t4 USING (a)
LEFT JOIN t5 USING (a)) USING (a);
b
SELECT c FROM t1 JOIN (t2 LEFT JOIN t3 USING (a) LEFT JOIN t4 USING (a)
LEFT JOIN t5 USING (a)) USING (a);
ERROR 23000: Column 'c' in field list is ambiguous
SELECT b FROM t1 JOIN (t2 JOIN t3 USING (a) JOIN t4 USING (a)
JOIN t5 USING (a)) USING (a);
b
SELECT c FROM t1 JOIN (t2 JOIN t3 USING (a) JOIN t4 USING (a)
JOIN t5 USING (a)) USING (a);
ERROR 23000: Column 'c' in field list is ambiguous
DROP TABLE t1,t2,t3,t4,t5;
CREATE TABLE t1 (a INT, b INT);
CREATE TABLE t2 (a INT, b INT);
CREATE TABLE t3 (a INT, b INT);
INSERT INTO t1 VALUES (1,1);
INSERT INTO t2 VALUES (1,1);
INSERT INTO t3 VALUES (1,1);
SELECT * FROM t1 JOIN (t2 JOIN t3 USING (b)) USING (a);
ERROR 23000: Column 'a' in from clause is ambiguous
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (
carrier char(2) default NULL,
id int NOT NULL auto_increment PRIMARY KEY
);
INSERT INTO t1 VALUES
('CO',235371754),('CO',235376554),('CO',235376884),('CO',235377874),
('CO',231060394),('CO',231059224),('CO',231059314),('CO',231060484),
('CO',231060274),('CO',231060124),('CO',231060244),('CO',231058594),
('CO',231058924),('CO',231058504),('CO',231059344),('CO',231060424),
('CO',231059554),('CO',231060304),('CO',231059644),('CO',231059464),
('CO',231059764),('CO',231058294),('CO',231058624),('CO',231058864),
('CO',231059374),('CO',231059584),('CO',231059734),('CO',231059014),
('CO',231059854),('CO',231059494),('CO',231059794),('CO',231058534),
('CO',231058324),('CO',231058684),('CO',231059524),('CO',231059974);
CREATE TABLE t2 (
scan_date date default NULL,
package_id int default NULL,
INDEX scan_date(scan_date),
INDEX package_id(package_id)
);
INSERT INTO t2 VALUES
('2008-12-29',231062944),('2008-12-29',231065764),('2008-12-29',231066124),
('2008-12-29',231060094),('2008-12-29',231061054),('2008-12-29',231065644),
('2008-12-29',231064384),('2008-12-29',231064444),('2008-12-29',231073774),
('2008-12-29',231058594),('2008-12-29',231059374),('2008-12-29',231066004),
('2008-12-29',231068494),('2008-12-29',231070174),('2008-12-29',231071884),
('2008-12-29',231063274),('2008-12-29',231063754),('2008-12-29',231064144),
('2008-12-29',231069424),('2008-12-29',231073714),('2008-12-29',231058414),
('2008-12-29',231060994),('2008-12-29',231069154),('2008-12-29',231068614),
('2008-12-29',231071464),('2008-12-29',231074014),('2008-12-29',231059614),
('2008-12-29',231059074),('2008-12-29',231059464),('2008-12-29',231069094),
('2008-12-29',231067294),('2008-12-29',231070144),('2008-12-29',231073804),
('2008-12-29',231072634),('2008-12-29',231058294),('2008-12-29',231065344),
('2008-12-29',231066094),('2008-12-29',231069034),('2008-12-29',231058594),
('2008-12-29',231059854),('2008-12-29',231059884),('2008-12-29',231059914),
('2008-12-29',231063664),('2008-12-29',231063814),('2008-12-29',231063904);
CREATE TABLE t3 (
package_id int default NULL,
INDEX package_id(package_id)
);
INSERT INTO t3 VALUES
(231058294),(231058324),(231058354),(231058384),(231058414),(231058444),
(231058474),(231058504),(231058534),(231058564),(231058594),(231058624),
(231058684),(231058744),(231058804),(231058864),(231058924),(231058954),
(231059014),(231059074),(231059104),(231059134),(231059164),(231059194),
(231059224),(231059254),(231059284),(231059314),(231059344),(231059374),
(231059404),(231059434),(231059464),(231059494),(231059524),(231059554),
(231059584),(231059614),(231059644),(231059674),(231059704),(231059734),
(231059764),(231059794),(231059824),(231059854),(231059884),(231059914),
(231059944),(231059974),(231060004),(231060034),(231060064),(231060094),
(231060124),(231060154),(231060184),(231060214),(231060244),(231060274),
(231060304),(231060334),(231060364),(231060394),(231060424),(231060454),
(231060484),(231060514),(231060544),(231060574),(231060604),(231060634),
(231060664),(231060694),(231060724),(231060754),(231060784),(231060814),
(231060844),(231060874),(231060904),(231060934),(231060964),(231060994),
(231061024),(231061054),(231061084),(231061144),(231061174),(231061204),
(231061234),(231061294),(231061354),(231061384),(231061414),(231061474),
(231061564),(231061594),(231061624),(231061684),(231061714),(231061774),
(231061804),(231061894),(231061984),(231062074),(231062134),(231062224),
(231062254),(231062314),(231062374),(231062434),(231062494),(231062554),
(231062584),(231062614),(231062644),(231062704),(231062734),(231062794),
(231062854),(231062884),(231062944),(231063004),(231063034),(231063064),
(231063124),(231063154),(231063184),(231063214),(231063274),(231063334),
(231063394),(231063424),(231063454),(231063514),(231063574),(231063664);
CREATE TABLE t4 (
carrier char(2) NOT NULL default '' PRIMARY KEY,
id int(11) default NULL,
INDEX id(id)
);
INSERT INTO t4 VALUES
('99',6),('SK',456),('UA',486),('AI',1081),('OS',1111),('VS',1510);
CREATE TABLE t5 (
carrier_id int default NULL,
INDEX carrier_id(carrier_id)
);
INSERT INTO t5 VALUES
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),
(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(6),(456),(456),(456),
(456),(456),(456),(456),(456),(456),(456),(456),(456),(456),(456),(456),
(456),(486),(1081),(1111),(1111),(1111),(1111),(1510);
SELECT COUNT(*)
FROM((t2 JOIN t1 ON t2.package_id = t1.id)
JOIN t3 ON t3.package_id = t1.id);
COUNT(*)
6
EXPLAIN
SELECT COUNT(*)
FROM ((t2 JOIN t1 ON t2.package_id = t1.id)
JOIN t3 ON t3.package_id = t1.id)
LEFT JOIN
(t5 JOIN t4 ON t5.carrier_id = t4.id)
ON t4.carrier = t1.carrier;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 NULL index package_id package_id 5 NULL 45 100.00 Using where; Using index
1 SIMPLE t1 NULL eq_ref PRIMARY PRIMARY 4 test.t2.package_id 1 100.00 Using join buffer (Batched Key Access)
1 SIMPLE t4 NULL eq_ref PRIMARY,id PRIMARY 2 test.t1.carrier 1 100.00 NULL
1 SIMPLE t5 NULL ref carrier_id carrier_id 5 test.t4.id 22 100.00 Using index
1 SIMPLE t3 NULL ref package_id package_id 5 test.t2.package_id 1 100.00 Using index
Warnings:
Note 1003 /* select#1 */ select count(0) AS `COUNT(*)` from `test`.`t2` join `test`.`t1` join `test`.`t3` left join (`test`.`t5` join `test`.`t4`) on(((`test`.`t5`.`carrier_id` = `test`.`t4`.`id`) and (`test`.`t4`.`carrier` = `test`.`t1`.`carrier`))) where ((`test`.`t1`.`id` = `test`.`t2`.`package_id`) and (`test`.`t3`.`package_id` = `test`.`t2`.`package_id`))
SELECT COUNT(*)
FROM ((t2 JOIN t1 ON t2.package_id = t1.id)
JOIN t3 ON t3.package_id = t1.id)
LEFT JOIN
(t5 JOIN t4 ON t5.carrier_id = t4.id)
ON t4.carrier = t1.carrier;
COUNT(*)
6
DROP TABLE t1,t2,t3,t4,t5;
End of 5.0 tests
CREATE TABLE t5 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b));
CREATE TABLE t6 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b));
CREATE TABLE t7 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b));
CREATE TABLE t8 (a int, b int, c int, PRIMARY KEY(a), KEY b_i (b));
INSERT INTO t5 VALUES (1,1,0), (2,2,0), (3,3,0);
INSERT INTO t6 VALUES (1,2,0), (3,2,0), (6,1,0);
INSERT INTO t7 VALUES (1,1,0), (2,2,0);
INSERT INTO t8 VALUES (0,2,0), (1,2,0);
EXPLAIN
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b AND
(t8.a > 0 OR t8.c IS NULL);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t5 NULL ALL NULL NULL NULL NULL 3 100.00 NULL
1 SIMPLE t7 NULL ref b_i b_i 5 test.t5.b 2 100.00 NULL
1 SIMPLE t6 NULL ALL b_i NULL NULL NULL 3 100.00 Using where
1 SIMPLE t8 NULL ref b_i b_i 5 test.t5.b 2 100.00 Using where
Warnings:
Note 1003 /* select#1 */ select `test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t8`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` < 10)))) on(((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t6`.`b` >= 2) and ((`test`.`t8`.`a` > 0) or isnull(`test`.`t8`.`c`)))) where 1
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5
LEFT JOIN
(
(t6, t7)
LEFT JOIN
t8
ON t7.b=t8.b AND t6.b < 10
)
ON t6.b >= 2 AND t5.b=t7.b AND
(t8.a > 0 OR t8.c IS NULL);
a b a b a b a b
1 1 1 2 1 1 NULL NULL
1 1 3 2 1 1 NULL NULL
2 2 1 2 2 2 1 2
2 2 3 2 2 2 1 2
3 3 NULL NULL NULL NULL NULL NULL
DELETE FROM t5;
DELETE FROM t6;
DELETE FROM t7;
DELETE FROM t8;
INSERT INTO t5 VALUES (1,3,0), (3,2,0);
INSERT INTO t6 VALUES (3,3,0);
INSERT INTO t7 VALUES (1,2,0);
INSERT INTO t8 VALUES (1,1,0);
EXPLAIN
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5 LEFT JOIN
(t6 LEFT JOIN t7 ON t7.a=1, t8)
ON (t5.b=t8.b);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t5 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 1 100.00 NULL
1 SIMPLE t7 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
1 SIMPLE t8 NULL ALL b_i NULL NULL NULL 1 100.00 Using where
Warnings:
Note 1003 /* select#1 */ select `test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t5` left join (`test`.`t6` left join `test`.`t7` on((`test`.`t7`.`a` = 1)) join `test`.`t8`) on((`test`.`t8`.`b` = `test`.`t5`.`b`)) where 1
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5 LEFT JOIN
(t6 LEFT JOIN t7 ON t7.a=1, t8)
ON (t5.b=t8.b);
a b a b a b a b
1 3 NULL NULL NULL NULL NULL NULL
3 2 NULL NULL NULL NULL NULL NULL
EXPLAIN
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5 LEFT JOIN
(t6 LEFT JOIN t7 ON t7.b=2, t8)
ON (t5.b=t8.b);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t5 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 1 100.00 NULL
1 SIMPLE t7 NULL ref b_i b_i 5 const 1 100.00 NULL
1 SIMPLE t8 NULL ALL b_i NULL NULL NULL 1 100.00 Using where
Warnings:
Note 1003 /* select#1 */ select `test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t5` left join (`test`.`t6` left join `test`.`t7` on((`test`.`t7`.`b` = 2)) join `test`.`t8`) on((`test`.`t8`.`b` = `test`.`t5`.`b`)) where 1
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5 LEFT JOIN
(t6 LEFT JOIN t7 ON t7.b=2, t8)
ON (t5.b=t8.b);
a b a b a b a b
1 3 NULL NULL NULL NULL NULL NULL
3 2 NULL NULL NULL NULL NULL NULL
EXPLAIN
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5 LEFT JOIN
(t8, t6 LEFT JOIN t7 ON t7.a=1)
ON (t5.b=t8.b);
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t5 NULL ALL NULL NULL NULL NULL 2 100.00 NULL
1 SIMPLE t8 NULL ALL b_i NULL NULL NULL 1 100.00 Using where
1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 1 100.00 NULL
1 SIMPLE t7 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b` from `test`.`t5` left join (`test`.`t8` join `test`.`t6` left join `test`.`t7` on((`test`.`t7`.`a` = 1))) on((`test`.`t8`.`b` = `test`.`t5`.`b`)) where 1
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t5 LEFT JOIN
(t8, t6 LEFT JOIN t7 ON t7.a=1)
ON (t5.b=t8.b);
a b a b a b a b
1 3 NULL NULL NULL NULL NULL NULL
3 2 NULL NULL NULL NULL NULL NULL
DROP TABLE t5,t6,t7,t8;
set optimizer_switch=default;