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Igor Babaev 2011-01-21 22:48:28 -08:00
commit ec368ab9fa
17 changed files with 1680 additions and 443 deletions
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mysql-test/r/join_cache.result
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72
mysql-test/r/join_nested_jcl6.result
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@ -81,9 +81,9 @@ WHERE t3.a=1 OR t3.c IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
Warnings: Warnings:
Note 1003 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`)) Note 1003 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`) and (`test`.`t2`.`b` is not null))) where ((`test`.`t3`.`a` = 1) or isnull(`test`.`t3`.`c`))
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
FROM t2 FROM t2
LEFT JOIN LEFT JOIN
@ -157,10 +157,10 @@ WHERE t3.a>1 OR t3.c IS NULL;
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join) 1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join)
Warnings: Warnings:
Note 1003 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`)) Note 1003 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`) and (`test`.`t2`.`b` is not null))) 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 SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2 FROM t2
LEFT JOIN LEFT JOIN
@ -187,10 +187,10 @@ WHERE (t3.a>1 OR t3.c IS NULL) AND
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings: Warnings:
Note 1003 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`))) Note 1003 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`) and (`test`.`t2`.`b` is not null))) 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 SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,t5.a,t5.b
FROM t2 FROM t2
LEFT JOIN LEFT JOIN
@ -237,9 +237,9 @@ ON t7.b=t8.b AND t6.b < 10;
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join) 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t8 hash NULL hj_key 5 test.t7.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
Warnings: Warnings:
Note 1003 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`.`t6`.`b` < 10) and (`test`.`t8`.`b` = `test`.`t7`.`b`))) where 1 Note 1003 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`.`t6`.`b` < 10) and (`test`.`t8`.`b` = `test`.`t7`.`b`)) and (`test`.`t7`.`b` is not null))) where 1
SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b SELECT t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM (t6, t7) FROM (t6, t7)
LEFT JOIN LEFT JOIN
@ -551,16 +551,16 @@ t0.b=t1.b AND
(t2.a >= 4 OR t2.c IS NULL); (t2.a >= 4 OR t2.c IS NULL);
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 hash NULL hj_key 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join) 1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join)
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t8 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
Warnings: Warnings:
Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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`))) Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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, 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 t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
FROM t0,t1 FROM t0,t1
@ -646,17 +646,17 @@ t0.b=t1.b AND
(t9.a=1); (t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 hash NULL hj_key 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t8 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings: Warnings:
Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
SELECT t9.a,t9.b SELECT t9.a,t9.b
FROM t9; FROM t9;
a b a b
@ -845,9 +845,9 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (flat, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
Warnings: Warnings:
Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) where (`test`.`t1`.`a` <= 2) Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) where (`test`.`t1`.`a` <= 2)
CREATE INDEX idx_b ON t2(b); CREATE INDEX idx_b ON t2(b);
EXPLAIN EXTENDED EXPLAIN EXTENDED
SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b SELECT t2.a,t2.b,t3.a,t3.b,t4.a,t4.b
@ -913,17 +913,17 @@ t0.b=t1.b AND
(t9.a=1); (t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 hash NULL hj_key 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t4 hash NULL hj_key 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t5 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t8 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings: Warnings:
Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
CREATE INDEX idx_b ON t4(b); CREATE INDEX idx_b ON t4(b);
CREATE INDEX idx_b ON t5(b); CREATE INDEX idx_b ON t5(b);
EXPLAIN EXTENDED EXPLAIN EXTENDED
@ -963,17 +963,17 @@ t0.b=t1.b AND
(t9.a=1); (t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 hash NULL hj_key 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join) 1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t8 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings: Warnings:
Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
CREATE INDEX idx_b ON t8(b); CREATE INDEX idx_b ON t8(b);
EXPLAIN EXTENDED EXPLAIN EXTENDED
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b, SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
@ -1012,17 +1012,17 @@ t0.b=t1.b AND
(t9.a=1); (t9.a=1);
id select_type table type possible_keys key key_len ref rows filtered Extra id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t0 ALL NULL NULL NULL NULL 3 100.00 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 hash NULL hj_key 5 test.t0.b 3 100.00 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join) 1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join) 1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings: Warnings:
Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`)))
CREATE INDEX idx_b ON t1(b); CREATE INDEX idx_b ON t1(b);
CREATE INDEX idx_a ON t0(a); CREATE INDEX idx_a ON t0(a);
EXPLAIN EXTENDED EXPLAIN EXTENDED
@ -1067,12 +1067,12 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join) 1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t5 ALL idx_b NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t7 hash NULL hj_key 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join) 1 SIMPLE t8 ref idx_b idx_b 5 test.t7.b 2 100.00 Using where; Using join buffer (incremental, BKA join)
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
Warnings: Warnings:
Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t5`.`b` is not null)))) on(((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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`.`t9`.`b` = `test`.`t8`.`b`) or isnull(`test`.`t8`.`c`))) Note 1003 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`.`t3`.`a` = 1) and (`test`.`t4`.`b` = `test`.`t2`.`b`)) and (`test`.`t2`.`b` is not null))) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on((((`test`.`t6`.`b` < 10) and ((`test`.`t7`.`b` = `test`.`t5`.`b`) and (`test`.`t8`.`b` = `test`.`t5`.`b`))) and (`test`.`t7`.`b` is not null)))) on((((`test`.`t6`.`b` >= 2) and (`test`.`t7`.`b` = `test`.`t5`.`b`)) and (`test`.`t5`.`b` is not null)))) on((((`test`.`t3`.`b` = 2) or isnull(`test`.`t3`.`c`)) and ((`test`.`t6`.`b` = 2) or isnull(`test`.`t6`.`c`)) and (((`test`.`t1`.`b` = `test`.`t0`.`b`) 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`.`t9`.`b` = `test`.`t8`.`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, 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 t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
FROM t0,t1 FROM t0,t1
@ -1324,7 +1324,7 @@ c11 c21 c31
EXPLAIN SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21; EXPLAIN SELECT * FROM t1 LEFT JOIN (t2 LEFT JOIN t3 ON c21=c31) ON c11=c21;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 1 SIMPLE t1 ALL NULL NULL NULL NULL 2
1 SIMPLE t2 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 5 test.t1.c11 0 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t3 ALL NULL NULL NULL NULL 0 Using where; Using join buffer (incremental, BNL join)
DROP TABLE t1,t2,t3; DROP TABLE t1,t2,t3;
CREATE TABLE t1 (goods int(12) NOT NULL, price varchar(128) NOT NULL); CREATE TABLE t1 (goods int(12) NOT NULL, price varchar(128) NOT NULL);

12
mysql-test/r/join_outer_jcl6.result
View File

@ -319,11 +319,11 @@ Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null; explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 2 test.t1.id 3 Using where; Not exists; Using join buffer (flat, BNLH join)
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.name is null; explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.name is null;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 2 test.t1.id 3 Using where; Using join buffer (flat, BNLH join)
select count(*) from t1 left join t2 on (t1.id = t2.owner); select count(*) from t1 left join t2 on (t1.id = t2.owner);
count(*) count(*)
4 4
@ -339,11 +339,11 @@ Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null; explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Not exists; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 2 test.t1.id 3 Using where; Not exists; Using join buffer (flat, BNLH join)
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.name is null; explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.name is null;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 2 test.t1.id 3 Using where; Using join buffer (flat, BNLH join)
select count(*) from t2 right join t1 on (t1.id = t2.owner); select count(*) from t2 right join t1 on (t1.id = t2.owner);
count(*) count(*)
4 4
@ -695,8 +695,8 @@ a1 a2 b1 b2 c1 c2
explain select * from t1 left join t2 on b1 = a1 left join t3 on c1 = a1 and b1 is null; explain select * from t1 left join t2 on b1 = a1 left join t3 on c1 = a1 and b1 is null;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 4 test.t1.a1 2 Using where; Using join buffer (flat, BNLH join)
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (incremental, BNL join) 1 SIMPLE t3 hash NULL hj_key 5 test.t1.a1 2 Using where; Using join buffer (incremental, BNLH join)
drop table t1, t2, t3; drop table t1, t2, t3;
create table t1 ( create table t1 (
a int(11), a int(11),

32
mysql-test/r/select_jcl6.result
View File

@ -1370,7 +1370,7 @@ id select_type table type possible_keys key key_len ref rows Extra
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null; explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr is null;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 1 SIMPLE t4 ALL NULL NULL NULL NULL 12
1 SIMPLE t2 ALL NULL NULL NULL NULL 1200 Using where; Not exists; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1200 Using where; Not exists; Using join buffer (flat, BNLH join)
select companynr,companyname from t2 left join t4 using (companynr) where companynr is null; select companynr,companyname from t2 left join t4 using (companynr) where companynr is null;
companynr companyname companynr companyname
select count(*) from t2 left join t4 using (companynr) where companynr is not null; select count(*) from t2 left join t4 using (companynr) where companynr is not null;
@ -1398,39 +1398,39 @@ id select_type table type possible_keys key key_len ref rows Extra
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0; explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0; explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 and companynr > 0; explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 and companynr > 0;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr is null; explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr is null;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 1 SIMPLE t4 ALL NULL NULL NULL NULL 12
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0 or t4.companynr > 0; explain select t2.companynr,companyname from t4 left join t2 using (companynr) where t2.companynr > 0 or t2.companynr < 0 or t4.companynr > 0;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select t2.companynr,companyname from t4 left join t2 using (companynr) where ifnull(t2.companynr,1)>0; explain select t2.companynr,companyname from t4 left join t2 using (companynr) where ifnull(t2.companynr,1)>0;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 1 SIMPLE t4 ALL NULL NULL NULL NULL 12
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr is null; explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr is null;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0 or companynr > 0; explain select companynr,companyname from t4 left join t2 using (companynr) where companynr > 0 or companynr < 0 or companynr > 0;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where 1 SIMPLE t4 ALL PRIMARY NULL NULL NULL 12 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
explain select companynr,companyname from t4 left join t2 using (companynr) where ifnull(companynr,1)>0; explain select companynr,companyname from t4 left join t2 using (companynr) where ifnull(companynr,1)>0;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where 1 SIMPLE t4 ALL NULL NULL NULL NULL 12 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 1 test.t4.companynr 1199 Using where; Using join buffer (flat, BNLH join)
select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
companynr companynr companynr companynr
37 36 37 36
@ -1438,7 +1438,7 @@ companynr companynr
explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1; explain select distinct t2.companynr,t4.companynr from t2,t4 where t2.companynr=t4.companynr+1;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary 1 SIMPLE t4 index NULL PRIMARY 1 NULL 12 Using index; Using temporary
1 SIMPLE t2 ALL NULL NULL NULL NULL 1199 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 1 func 1199 Using where; Using join buffer (flat, BNLH join)
select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008; select t2.fld1,t2.companynr,fld3,period from t3,t2 where t2.fld1 = 38208 and t2.fld1=t3.t2nr and period = 1008 or t2.fld1 = 38008 and t2.fld1 =t3.t2nr and period = 1008;
fld1 companynr fld3 period fld1 companynr fld3 period
038008 37 reporters 1008 038008 37 reporters 1008
@ -2337,7 +2337,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t3 system NULL NULL NULL NULL 0 const row not found 1 SIMPLE t3 system NULL NULL NULL NULL 0 const row not found
1 SIMPLE t4 const id4 NULL NULL NULL 1 1 SIMPLE t4 const id4 NULL NULL NULL 1
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 1 SIMPLE t1 ALL NULL NULL NULL NULL 2
1 SIMPLE t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 4 test.t1.id1 1 Using where; Using join buffer (flat, BNLH join)
select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3 select * from t1 left join t2 on id1 = id2 left join t3 on id1 = id3
left join t4 on id3 = id4 where id2 = 1 or id4 = 1; left join t4 on id3 = id4 where id2 = 1 or id4 = 1;
id1 id2 id3 id4 id44 id1 id2 id3 id4 id44
@ -2916,12 +2916,12 @@ a
4 4
EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a; EXPLAIN SELECT t1.a FROM t1 STRAIGHT_JOIN t2 ON t1.a=t2.a;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t2 hash NULL hj_key 5 test.t1.a 3 Using where; Using join buffer (flat, BNLH join)
EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a; EXPLAIN SELECT t1.a FROM t1 INNER JOIN t2 ON t1.a=t2.a;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 Using where
1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) 1 SIMPLE t1 hash NULL hj_key 5 test.t2.a 5 Using where; Using join buffer (flat, BNLH join)
DROP TABLE t1,t2; DROP TABLE t1,t2;
select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0; select x'10' + 0, X'10' + 0, b'10' + 0, B'10' + 0;
x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0 x'10' + 0 X'10' + 0 b'10' + 0 B'10' + 0

22
mysql-test/r/subselect3_jcl6.result
View File

@ -1031,10 +1031,10 @@ explain select t21.* from t21,t22 where t21.a = t22.a and
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a; t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort
1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t21 hash NULL hj_key 4 test.t11.a 26 Using where; Using join buffer (flat, BNLH join)
1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer (incremental, BNL join) 1 PRIMARY t22 hash NULL hj_key 4 test.t11.a 26 Using where; Using join buffer (incremental, BNLH join)
2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where 2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where
2 SUBQUERY t12 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join) 2 SUBQUERY t12 hash NULL hj_key 4 test.t11.a 8 Using where; Using join buffer (flat, BNLH join)
select t21.* from t21,t22 where t21.a = t22.a and select t21.* from t21,t22 where t21.a = t22.a and
t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a; t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
a b c a b c
@ -1151,11 +1151,11 @@ set @@optimizer_switch='firstmatch=off,materialization=off';
set @@max_heap_table_size= 16384; set @@max_heap_table_size= 16384;
explain select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E); explain select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY E ALL NULL NULL NULL NULL 5 Start temporary 1 PRIMARY E ALL NULL NULL NULL NULL 5 Using where; Start temporary
1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join) 1 PRIMARY A ALL NULL NULL NULL NULL 10 Using join buffer (flat, BNL join)
1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (incremental, BNL join) 1 PRIMARY B ALL NULL NULL NULL NULL 10 Using join buffer (incremental, BNL join)
1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer (incremental, BNL join) 1 PRIMARY C ALL NULL NULL NULL NULL 10 Using join buffer (incremental, BNL join)
1 PRIMARY D ALL NULL NULL NULL NULL 10 Using where; End temporary; Using join buffer (incremental, BNL join) 1 PRIMARY D hash NULL hj_key 5 test.E.a 10 Using where; End temporary; Using join buffer (incremental, BNLH join)
flush status; flush status;
select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E); select count(*) from t0 A, t0 B, t0 C, t0 D where D.a in (select a from t1 E);
count(*) count(*)
@ -1192,12 +1192,12 @@ insert into t3 select * from t1;
insert into t3 values (1),(2); insert into t3 values (1),(2);
explain select * from t2 where a in (select a from t1); explain select * from t2 where a in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Start temporary
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer (flat, BNL join) 1 PRIMARY t1 hash NULL hj_key 4 test.t2.a 4 Using where; End temporary; Using join buffer (flat, BNLH join)
explain select * from t2 where a in (select a from t2); explain select * from t2 where a in (select a from t2);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Start temporary
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join) 1 PRIMARY t2 hash NULL hj_key 5 test.t2.a 2 Using where; End temporary; Using join buffer (flat, BNLH join)
explain select * from t2 where a in (select a from t3); explain select * from t2 where a in (select a from t3);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Start temporary
@ -1211,8 +1211,8 @@ create table t1 (a decimal);
insert into t1 values (1),(2); insert into t1 values (1),(2);
explain select * from t1 where a in (select a from t1); explain select * from t1 where a in (select a from t1);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Start temporary 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; Start temporary
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (flat, BNL join) 1 PRIMARY t1 hash NULL hj_key 6 test.t1.a 2 Using where; End temporary; Using join buffer (flat, BNLH join)
drop table t1; drop table t1;
set @@optimizer_switch=@save_optimizer_switch; set @@optimizer_switch=@save_optimizer_switch;
create table t1 (a int); create table t1 (a int);

10
mysql-test/r/subselect_sj2_jcl6.result
View File

@ -138,8 +138,8 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it); from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer (flat, BNL join) 1 PRIMARY ot hash NULL hj_key 5 test.it.a 32 Using where; Using join buffer (flat, BNLH join)
2 SUBQUERY it ALL NULL NULL NULL NULL 22 2 SUBQUERY it ALL NULL NULL NULL NULL 22 Using where
select select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it); from t1 ot where a in (select a from t2 it);
@ -206,8 +206,8 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it); from t1 ot where a in (select a from t2 it);
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22 1 PRIMARY subselect2 ALL unique_key NULL NULL NULL 22
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer (flat, BNL join) 1 PRIMARY ot hash NULL hj_key 5 test.it.a 52 Using where; Using join buffer (flat, BNLH join)
2 SUBQUERY it ALL NULL NULL NULL NULL 22 2 SUBQUERY it ALL NULL NULL NULL NULL 22 Using where
select select
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
from t1 ot where a in (select a from t2 it); from t1 ot where a in (select a from t2 it);
@ -588,7 +588,7 @@ explain
select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3)); select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3));
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 1 PRIMARY t1 ALL NULL NULL NULL NULL 3
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t2 hash NULL hj_key 5 test.t1.a 3 Using where; Using join buffer (flat, BNLH join)
2 DEPENDENT SUBQUERY t3 unique_subquery PRIMARY PRIMARY 4 func 1 Using index 2 DEPENDENT SUBQUERY t3 unique_subquery PRIMARY PRIMARY 4 func 1 Using index
drop table t0, t1, t2, t3; drop table t0, t1, t2, t3;
create table t1 (a int); create table t1 (a int);

1
mysql-test/r/subselect_sj_jcl6.result
View File

@ -1,6 +1,7 @@
set @save_optimizer_switch_jcl6=@@optimizer_switch; set @save_optimizer_switch_jcl6=@@optimizer_switch;
set @@optimizer_switch='semijoin_with_cache=on'; set @@optimizer_switch='semijoin_with_cache=on';
set @@optimizer_switch='outer_join_with_cache=on'; set @@optimizer_switch='outer_join_with_cache=on';
set @@optimizer_switch='join_cache_hashed=off';
set join_cache_level=6; set join_cache_level=6;
show variables like 'join_cache_level'; show variables like 'join_cache_level';
Variable_name Value Variable_name Value

2
mysql-test/suite/innodb/r/innodb_mysql.result
View File

@ -2656,7 +2656,7 @@ SELECT t1.pk FROM t1,t2
WHERE t1.pk = t2.pk AND t2.pk <> 8; WHERE t1.pk = t2.pk AND t2.pk <> 8;
id select_type table type possible_keys key key_len ref rows Extra id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 11 Using where; Using index 1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 11 Using where; Using index
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.pk 1 Using index; Using join buffer (flat, BNLH join) 1 SIMPLE t2 hash PRIMARY PRIMARY 4 test.t1.pk 13 Using index; Using join buffer (flat, BNLH join)
SELECT t1.pk FROM t1,t2 SELECT t1.pk FROM t1,t2
WHERE t1.pk = t2.pk AND t2.pk <> 8; WHERE t1.pk = t2.pk AND t2.pk <> 8;
pk pk

116
mysql-test/t/join_cache.test
View File

@ -58,6 +58,60 @@ SELECT City.Name, Country.Name, CountryLanguage.Language
set join_cache_level=2; set join_cache_level=2;
show variables like 'join_cache_level'; show variables like 'join_cache_level';
EXPLAIN
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
EXPLAIN
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
CountryLanguage.Country=Country.Code AND
City.Name LIKE 'L%' AND Country.Population > 3000000 AND
CountryLanguage.Percentage > 50;
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
CountryLanguage.Country=Country.Code AND
City.Name LIKE 'L%' AND Country.Population > 3000000 AND
CountryLanguage.Percentage > 50;
set join_cache_level=3;
show variables like 'join_cache_level';
EXPLAIN
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
EXPLAIN
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
CountryLanguage.Country=Country.Code AND
City.Name LIKE 'L%' AND Country.Population > 3000000 AND
CountryLanguage.Percentage > 50;
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
CountryLanguage.Country=Country.Code AND
City.Name LIKE 'L%' AND Country.Population > 3000000 AND
CountryLanguage.Percentage > 50;
set join_cache_level=4;
show variables like 'join_cache_level';
EXPLAIN EXPLAIN
SELECT City.Name, Country.Name FROM City,Country SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND WHERE City.Country=Country.Code AND
@ -116,6 +170,60 @@ SELECT City.Name, Country.Name, CountryLanguage.Language
set join_cache_level=2; set join_cache_level=2;
show variables like 'join_cache_level'; show variables like 'join_cache_level';
EXPLAIN
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
EXPLAIN
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
CountryLanguage.Country=Country.Code AND
City.Name LIKE 'L%' AND Country.Population > 3000000 AND
CountryLanguage.Percentage > 50;
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
CountryLanguage.Country=Country.Code AND
City.Name LIKE 'L%' AND Country.Population > 3000000 AND
CountryLanguage.Percentage > 50;
set join_cache_level=3;
show variables like 'join_cache_level';
EXPLAIN
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND
Country.Name LIKE 'L%' AND City.Population > 100000;
EXPLAIN
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
CountryLanguage.Country=Country.Code AND
City.Name LIKE 'L%' AND Country.Population > 3000000 AND
CountryLanguage.Percentage > 50;
SELECT City.Name, Country.Name, CountryLanguage.Language
FROM City,Country,CountryLanguage
WHERE City.Country=Country.Code AND
CountryLanguage.Country=Country.Code AND
City.Name LIKE 'L%' AND Country.Population > 3000000 AND
CountryLanguage.Percentage > 50;
set join_cache_level=4;
show variables like 'join_cache_level';
EXPLAIN EXPLAIN
SELECT City.Name, Country.Name FROM City,Country SELECT City.Name, Country.Name FROM City,Country
WHERE City.Country=Country.Code AND WHERE City.Country=Country.Code AND
@ -2642,13 +2750,13 @@ SET SESSION optimizer_switch = 'outer_join_with_cache=on';
SET SESSION join_cache_level = 6; SET SESSION join_cache_level = 6;
EXPLAIN EXPLAIN
SELECT * FROM t1 LEFT JOIN t2 JOIN t3 ON t3.a3 = t2.a2 ON t3.b3 <> 0 ; SELECT * FROM t1 LEFT JOIN t2 JOIN t3 ON t3.a3 = t2.a2 ON t3.b3 <> 0;
SELECT * FROM t1 LEFT JOIN t2 JOIN t3 ON t3.a3 = t2.a2 ON t3.b3 <> 0 ; SELECT * FROM t1 LEFT JOIN t2 JOIN t3 ON t3.a3 = t2.a2 ON t3.b3 <> 0;
SET SESSION join_cache_level = 5; SET SESSION join_cache_level = 5;
EXPLAIN EXPLAIN
SELECT * FROM t1 LEFT JOIN t2 JOIN t3 ON t3.a3 = t2.a2 ON t3.b3 <> 0 ; SELECT * FROM t1 LEFT JOIN t2 JOIN t3 ON t3.a3 = t2.a2 ON t3.b3 <> 0;
SELECT * FROM t1 LEFT JOIN t2 JOIN t3 ON t3.a3 = t2.a2 ON t3.b3 <> 0 ; SELECT * FROM t1 LEFT JOIN t2 JOIN t3 ON t3.a3 = t2.a2 ON t3.b3 <> 0;
SET SESSION optimizer_switch = 'outer_join_with_cache=off'; SET SESSION optimizer_switch = 'outer_join_with_cache=off';
SET SESSION join_cache_level = DEFAULT; SET SESSION join_cache_level = DEFAULT;

1
mysql-test/t/subselect_sj_jcl6.test
View File

@ -5,6 +5,7 @@
set @save_optimizer_switch_jcl6=@@optimizer_switch; set @save_optimizer_switch_jcl6=@@optimizer_switch;
set @@optimizer_switch='semijoin_with_cache=on'; set @@optimizer_switch='semijoin_with_cache=on';
set @@optimizer_switch='outer_join_with_cache=on'; set @@optimizer_switch='outer_join_with_cache=on';
set @@optimizer_switch='join_cache_hashed=off';
set join_cache_level=6; set join_cache_level=6;
show variables like 'join_cache_level'; show variables like 'join_cache_level';

14
sql/opt_index_cond_pushdown.cc
View File

@ -279,15 +279,12 @@ Item *make_cond_remainder(Item *cond, bool exclude_index)
tab A join tab that has tab->table->file and its condition tab A join tab that has tab->table->file and its condition
in tab->select_cond in tab->select_cond
keyno Index for which extract and push the condition keyno Index for which extract and push the condition
other_tbls_ok TRUE <=> Fields of other non-const tables are allowed
factor_out TRUE <=> Factor out the extracted condition
DESCRIPTION DESCRIPTION
Try to extract and push the index condition down to table handler Try to extract and push the index condition down to table handler
*/ */
void push_index_cond(JOIN_TAB *tab, uint keyno, bool other_tbls_ok, void push_index_cond(JOIN_TAB *tab, uint keyno)
bool factor_out)
{ {
DBUG_ENTER("push_index_cond"); DBUG_ENTER("push_index_cond");
Item *idx_cond; Item *idx_cond;
@ -320,7 +317,7 @@ void push_index_cond(JOIN_TAB *tab, uint keyno, bool other_tbls_ok,
print_where(tab->select_cond, "full cond", QT_ORDINARY);); print_where(tab->select_cond, "full cond", QT_ORDINARY););
idx_cond= make_cond_for_index(tab->select_cond, tab->table, keyno, idx_cond= make_cond_for_index(tab->select_cond, tab->table, keyno,
other_tbls_ok); tab->icp_other_tables_ok);
DBUG_EXECUTE("where", DBUG_EXECUTE("where",
print_where(idx_cond, "idx cond", QT_ORDINARY);); print_where(idx_cond, "idx cond", QT_ORDINARY););
@ -339,10 +336,8 @@ void push_index_cond(JOIN_TAB *tab, uint keyno, bool other_tbls_ok,
/* /*
if cache is used then the value is TRUE only if cache is used then the value is TRUE only
for BKA[_UNIQUE] cache (see check_join_cache_usage func). for BKA[_UNIQUE] cache (see check_join_cache_usage func).
In this case other_tbls_ok is an equivalent of
cache->is_key_access().
*/ */
other_tbls_ok && tab->icp_other_tables_ok &&
(idx_cond->used_tables() & (idx_cond->used_tables() &
~(tab->table->map | tab->join->const_table_map))) ~(tab->table->map | tab->join->const_table_map)))
tab->cache_idx_cond= idx_cond; tab->cache_idx_cond= idx_cond;
@ -360,7 +355,8 @@ void push_index_cond(JOIN_TAB *tab, uint keyno, bool other_tbls_ok,
if (idx_remainder_cond != idx_cond) if (idx_remainder_cond != idx_cond)
tab->ref.disable_cache= TRUE; tab->ref.disable_cache= TRUE;
Item *row_cond= factor_out ? make_cond_remainder(tab->select_cond, TRUE) : Item *row_cond= tab->idx_cond_fact_out ?
make_cond_remainder(tab->select_cond, TRUE) :
tab->pre_idx_push_select_cond; tab->pre_idx_push_select_cond;
DBUG_EXECUTE("where", DBUG_EXECUTE("where",

24
sql/opt_subselect.cc
View File

@ -1326,16 +1326,21 @@ static uint get_tmp_table_rec_length(List<Item> &items)
bool find_eq_ref_candidate(TABLE *table, table_map sj_inner_tables) bool find_eq_ref_candidate(TABLE *table, table_map sj_inner_tables)
{ {
KEYUSE *keyuse= table->reginfo.join_tab->keyuse; KEYUSE *keyuse= table->reginfo.join_tab->keyuse;
uint key;
if (keyuse) if (keyuse)
{ {
while (1) /* For each key */ do
{ {
key= keyuse->key; uint key= keyuse->key;
KEY *keyinfo= table->key_info + key; KEY *keyinfo;
key_part_map bound_parts= 0; key_part_map bound_parts= 0;
if (keyinfo->flags & HA_NOSAME) bool is_excluded_key= keyuse->is_for_hash_join();
if (!is_excluded_key)
{
keyinfo= table->key_info + key;
is_excluded_key= !test(keyinfo->flags & HA_NOSAME);
}
if (!is_excluded_key)
{ {
do /* For all equalities on all key parts */ do /* For all equalities on all key parts */
{ {
@ -1350,20 +1355,15 @@ bool find_eq_ref_candidate(TABLE *table, table_map sj_inner_tables)
if (bound_parts == PREV_BITS(uint, keyinfo->key_parts)) if (bound_parts == PREV_BITS(uint, keyinfo->key_parts))
return TRUE; return TRUE;
if (keyuse->table != table)
return FALSE;
} }
else else
{ {
do do
{ {
keyuse++; keyuse++;
if (keyuse->table != table) } while (keyuse->key == key && keyuse->table == table);
return FALSE;
}
while (keyuse->key == key);
}
} }
} while (keyuse->table == table);
} }
return FALSE; return FALSE;
} }

7
sql/sql_join_cache.cc
View File

@ -1060,9 +1060,8 @@ bool JOIN_CACHE::check_emb_key_usage()
CACHE_FIELD *copy; CACHE_FIELD *copy;
CACHE_FIELD *copy_end; CACHE_FIELD *copy_end;
uint len= 0; uint len= 0;
TABLE *table= join_tab->table;
TABLE_REF *ref= &join_tab->ref; TABLE_REF *ref= &join_tab->ref;
KEY *keyinfo= table->key_info+ref->key; KEY *keyinfo= join_tab->get_keyinfo_by_key_no(ref->key);
/* /*
If some of the key arguments are not from the local cache the key If some of the key arguments are not from the local cache the key
@ -2528,7 +2527,7 @@ int JOIN_CACHE_HASHED::init()
pack_length+= get_size_of_rec_offset(); pack_length+= get_size_of_rec_offset();
pack_length_with_blob_ptrs+= get_size_of_rec_offset(); pack_length_with_blob_ptrs+= get_size_of_rec_offset();
ref_key_info= join_tab->table->key_info+join_tab->ref.key; ref_key_info= join_tab->get_keyinfo_by_key_no(join_tab->ref.key);
ref_used_key_parts= join_tab->ref.key_parts; ref_used_key_parts= join_tab->ref.key_parts;
hash_func= &JOIN_CACHE_HASHED::get_hash_idx_simple; hash_func= &JOIN_CACHE_HASHED::get_hash_idx_simple;
@ -3437,7 +3436,7 @@ uchar *JOIN_CACHE_BNLH::get_matching_chain_by_join_key()
uchar *key_ref_ptr; uchar *key_ref_ptr;
TABLE *table= join_tab->table; TABLE *table= join_tab->table;
TABLE_REF *ref= &join_tab->ref; TABLE_REF *ref= &join_tab->ref;
KEY *keyinfo= table->key_info+ref->key; KEY *keyinfo= join_tab->get_keyinfo_by_key_no(ref->key);
/* Build the join key value out of the record in the record buffer */ /* Build the join key value out of the record in the record buffer */
key_copy(key_buff, table->record[0], keyinfo, key_length, TRUE); key_copy(key_buff, table->record[0], keyinfo, key_length, TRUE);
/* Look for this key in the join buffer */ /* Look for this key in the join buffer */

776
sql/sql_select.cc
View File

File diff suppressed because it is too large Load Diff

43
sql/sql_select.h
View File

@ -39,6 +39,11 @@
/* Values in optimize */ /* Values in optimize */
#define KEY_OPTIMIZE_EXISTS 1 #define KEY_OPTIMIZE_EXISTS 1
#define KEY_OPTIMIZE_REF_OR_NULL 2 #define KEY_OPTIMIZE_REF_OR_NULL 2
#define KEY_OPTIMIZE_EQ 4
inline uint get_hash_join_key_no() { return MAX_KEY; }
inline bool is_hash_join_key_no(uint key) { return key == MAX_KEY; }
typedef struct keyuse_t { typedef struct keyuse_t {
TABLE *table; TABLE *table;
@ -68,6 +73,8 @@ typedef struct keyuse_t {
MAX_UINT Otherwise MAX_UINT Otherwise
*/ */
uint sj_pred_no; uint sj_pred_no;
bool is_for_hash_join() { return is_hash_join_key_no(key); }
} KEYUSE; } KEYUSE;
class store_key; class store_key;
@ -127,7 +134,8 @@ typedef struct st_table_ref
*/ */
enum join_type { JT_UNKNOWN,JT_SYSTEM,JT_CONST,JT_EQ_REF,JT_REF,JT_MAYBE_REF, enum join_type { JT_UNKNOWN,JT_SYSTEM,JT_CONST,JT_EQ_REF,JT_REF,JT_MAYBE_REF,
JT_ALL, JT_RANGE, JT_NEXT, JT_FT, JT_REF_OR_NULL, JT_ALL, JT_RANGE, JT_NEXT, JT_FT, JT_REF_OR_NULL,
JT_UNIQUE_SUBQUERY, JT_INDEX_SUBQUERY, JT_INDEX_MERGE}; JT_UNIQUE_SUBQUERY, JT_INDEX_SUBQUERY, JT_INDEX_MERGE,
JT_HASH};
class JOIN; class JOIN;
@ -159,6 +167,8 @@ typedef struct st_join_table {
st_join_table() {} /* Remove gcc warning */ st_join_table() {} /* Remove gcc warning */
TABLE *table; TABLE *table;
KEYUSE *keyuse; /**< pointer to first used key */ KEYUSE *keyuse; /**< pointer to first used key */
KEY *hj_key; /**< descriptor of the used best hash join key
not supported by any index */
SQL_SELECT *select; SQL_SELECT *select;
COND *select_cond; COND *select_cond;
COND *on_precond; /**< part of on condition to check before COND *on_precond; /**< part of on condition to check before
@ -241,7 +251,15 @@ typedef struct st_join_table {
*/ */
ha_rows limit; ha_rows limit;
TABLE_REF ref; TABLE_REF ref;
/* TRUE <=> condition pushdown supports other tables presence */
bool icp_other_tables_ok;
/*
TRUE <=> condition pushed to the index has to be factored out of
the condition pushed to the table
*/
bool idx_cond_fact_out;
bool use_join_cache; bool use_join_cache;
uint used_join_cache_level;
ulong join_buffer_size_limit; ulong join_buffer_size_limit;
JOIN_CACHE *cache; JOIN_CACHE *cache;
/* /*
@ -408,6 +426,11 @@ typedef struct st_join_table {
double get_partial_join_cardinality() { return partial_join_cardinality; } double get_partial_join_cardinality() { return partial_join_cardinality; }
bool hash_join_is_possible(); bool hash_join_is_possible();
int make_scan_filter(); int make_scan_filter();
bool is_ref_for_hash_join() { return is_hash_join_key_no(ref.key); }
KEY *get_keyinfo_by_key_no(uint key)
{
return (is_hash_join_key_no(key) ? hj_key : table->key_info+key);
}
} JOIN_TAB; } JOIN_TAB;
@ -681,6 +704,15 @@ public:
Item *tmp_having; ///< To store having when processed temporary table Item *tmp_having; ///< To store having when processed temporary table
Item *having_history; ///< Store having for explain Item *having_history; ///< Store having for explain
ulonglong select_options; ulonglong select_options;
/*
Bitmap of allowed types of the join caches that
can be used for join operations
*/
uint allowed_join_cache_types;
bool allowed_semijoin_with_cache;
bool allowed_outer_join_with_cache;
/* Maximum level of the join caches that can be used for join operations */
uint max_allowed_join_cache_level;
select_result *result; select_result *result;
TMP_TABLE_PARAM tmp_table_param; TMP_TABLE_PARAM tmp_table_param;
MYSQL_LOCK *lock; MYSQL_LOCK *lock;
@ -947,6 +979,12 @@ public:
bool shrink_join_buffers(JOIN_TAB *jt, bool shrink_join_buffers(JOIN_TAB *jt,
ulonglong curr_space, ulonglong curr_space,
ulonglong needed_space); ulonglong needed_space);
void set_allowed_join_cache_types();
bool is_allowed_hash_join_access()
{
return test(allowed_join_cache_types & JOIN_CACHE_HASHED_BIT) &&
max_allowed_join_cache_level > JOIN_CACHE_HASHED_BIT;
}
private: private:
/** /**
@ -1223,8 +1261,7 @@ inline bool optimizer_flag(THD *thd, uint flag)
void eliminate_tables(JOIN *join); void eliminate_tables(JOIN *join);
/* Index Condition Pushdown entry point function */ /* Index Condition Pushdown entry point function */
void push_index_cond(JOIN_TAB *tab, uint keyno, bool other_tbls_ok, void push_index_cond(JOIN_TAB *tab, uint keyno);
bool factor_out);
/**************************************************************************** /****************************************************************************
Temporary table support for SQL Runtime Temporary table support for SQL Runtime

94
sql/table.cc
View File

@ -2342,7 +2342,7 @@ partititon_err:
/* Allocate bitmaps */ /* Allocate bitmaps */
bitmap_size= share->column_bitmap_size; bitmap_size= share->column_bitmap_size;
if (!(bitmaps= (uchar*) alloc_root(&outparam->mem_root, bitmap_size*4))) if (!(bitmaps= (uchar*) alloc_root(&outparam->mem_root, bitmap_size*5)))
goto err; goto err;
bitmap_init(&outparam->def_read_set, bitmap_init(&outparam->def_read_set,
(my_bitmap_map*) bitmaps, share->fields, FALSE); (my_bitmap_map*) bitmaps, share->fields, FALSE);
@ -2352,6 +2352,8 @@ partititon_err:
(my_bitmap_map*) (bitmaps+bitmap_size*2), share->fields, FALSE); (my_bitmap_map*) (bitmaps+bitmap_size*2), share->fields, FALSE);
bitmap_init(&outparam->tmp_set, bitmap_init(&outparam->tmp_set,
(my_bitmap_map*) (bitmaps+bitmap_size*3), share->fields, FALSE); (my_bitmap_map*) (bitmaps+bitmap_size*3), share->fields, FALSE);
bitmap_init(&outparam->eq_join_set,
(my_bitmap_map*) (bitmaps+bitmap_size*4), share->fields, FALSE);
outparam->default_column_bitmaps(); outparam->default_column_bitmaps();
/* The table struct is now initialized; Open the table */ /* The table struct is now initialized; Open the table */
@ -5203,6 +5205,52 @@ bool TABLE::alloc_keys(uint key_count)
} }
void TABLE::create_key_part_by_field(KEY *keyinfo,
KEY_PART_INFO *key_part_info,
Field *field)
{
field->flags|= PART_KEY_FLAG;
key_part_info->null_bit= field->null_bit;
key_part_info->null_offset= (uint) (field->null_ptr -
(uchar*) record[0]);
key_part_info->field= field;
key_part_info->offset= field->offset(record[0]);
key_part_info->length= (uint16) field->pack_length();
keyinfo->key_length+= key_part_info->length;
key_part_info->key_part_flag= 0;
/* TODO:
The below method of computing the key format length of the
key part is a copy/paste from opt_range.cc, and table.cc.
This should be factored out, e.g. as a method of Field.
In addition it is not clear if any of the Field::*_length
methods is supposed to compute the same length. If so, it
might be reused.
*/
key_part_info->store_length= key_part_info->length;
if (field->real_maybe_null())
{
key_part_info->store_length+= HA_KEY_NULL_LENGTH;
keyinfo->key_length+= HA_KEY_NULL_LENGTH;
}
if (field->type() == MYSQL_TYPE_BLOB ||
field->real_type() == MYSQL_TYPE_VARCHAR)
{
key_part_info->store_length+= HA_KEY_BLOB_LENGTH;
keyinfo->key_length+= HA_KEY_BLOB_LENGTH; // ???
key_part_info->key_part_flag|=
field->type() == MYSQL_TYPE_BLOB ? HA_BLOB_PART: HA_VAR_LENGTH_PART;
}
key_part_info->type= (uint8) field->key_type();
key_part_info->key_type =
((ha_base_keytype) key_part_info->type == HA_KEYTYPE_TEXT ||
(ha_base_keytype) key_part_info->type == HA_KEYTYPE_VARTEXT1 ||
(ha_base_keytype) key_part_info->type == HA_KEYTYPE_VARTEXT2) ?
0 : FIELDFLAG_BINARY;
}
/** /**
Add a key to a temporary table Add a key to a temporary table
@ -5253,54 +5301,18 @@ bool TABLE::add_tmp_key(uint key, uint key_parts,
if (!keyinfo->rec_per_key) if (!keyinfo->rec_per_key)
return TRUE; return TRUE;
bzero(keyinfo->rec_per_key, sizeof(ulong)*key_parts); bzero(keyinfo->rec_per_key, sizeof(ulong)*key_parts);
for (i= 0; i < key_parts; i++) for (i= 0; i < key_parts; i++)
{ {
reg_field= field + next_field_no(arg); reg_field= field + next_field_no(arg);
if (key_start) if (key_start)
(*reg_field)->key_start.set_bit(key); (*reg_field)->key_start.set_bit(key);
key_start= FALSE;
(*reg_field)->part_of_key.set_bit(key); (*reg_field)->part_of_key.set_bit(key);
(*reg_field)->flags|= PART_KEY_FLAG; create_key_part_by_field(keyinfo, key_part_info, *reg_field);
key_part_info->null_bit= (*reg_field)->null_bit; key_start= FALSE;
key_part_info->null_offset= (uint) ((*reg_field)->null_ptr -
(uchar*) record[0]);
key_part_info->field= *reg_field;
key_part_info->offset= (*reg_field)->offset(record[0]);
key_part_info->length= (uint16) (*reg_field)->pack_length();
keyinfo->key_length+= key_part_info->length;
key_part_info->key_part_flag= 0;
/* TODO:
The below method of computing the key format length of the
key part is a copy/paste from opt_range.cc, and table.cc.
This should be factored out, e.g. as a method of Field.
In addition it is not clear if any of the Field::*_length
methods is supposed to compute the same length. If so, it
might be reused.
*/
key_part_info->store_length= key_part_info->length;
if ((*reg_field)->real_maybe_null())
{
key_part_info->store_length+= HA_KEY_NULL_LENGTH;
keyinfo->key_length+= HA_KEY_NULL_LENGTH;
if (unique)
keyinfo->flags|= HA_NULL_ARE_EQUAL; // def. that NULL == NULL
}
if ((*reg_field)->type() == MYSQL_TYPE_BLOB ||
(*reg_field)->real_type() == MYSQL_TYPE_VARCHAR)
{
key_part_info->store_length+= HA_KEY_BLOB_LENGTH;
keyinfo->key_length+= HA_KEY_BLOB_LENGTH; // ???
}
key_part_info->type= (uint8) (*reg_field)->key_type();
key_part_info->key_type =
((ha_base_keytype) key_part_info->type == HA_KEYTYPE_TEXT ||
(ha_base_keytype) key_part_info->type == HA_KEYTYPE_VARTEXT1 ||
(ha_base_keytype) key_part_info->type == HA_KEYTYPE_VARTEXT2) ?
0 : FIELDFLAG_BINARY;
key_part_info++; key_part_info++;
} }
set_if_bigger(s->max_key_length, keyinfo->key_length); set_if_bigger(s->max_key_length, keyinfo->key_length);
s->keys++; s->keys++;
return FALSE; return FALSE;

3
sql/table.h
View File

@ -725,6 +725,7 @@ struct st_table {
uchar *null_flags; uchar *null_flags;
my_bitmap_map *bitmap_init_value; my_bitmap_map *bitmap_init_value;
MY_BITMAP def_read_set, def_write_set, def_vcol_set, tmp_set; MY_BITMAP def_read_set, def_write_set, def_vcol_set, tmp_set;
MY_BITMAP eq_join_set; /* used to mark equi-joined fields */
MY_BITMAP *read_set, *write_set, *vcol_set; /* Active column sets */ MY_BITMAP *read_set, *write_set, *vcol_set; /* Active column sets */
/* /*
The ID of the query that opened and is using this table. Has different The ID of the query that opened and is using this table. Has different
@ -955,6 +956,8 @@ struct st_table {
bool add_tmp_key(uint key, uint key_parts, bool add_tmp_key(uint key, uint key_parts,
uint (*next_field_no) (uchar *), uchar *arg, uint (*next_field_no) (uchar *), uchar *arg,
bool unique); bool unique);
void create_key_part_by_field(KEY *keyinfo, KEY_PART_INFO *key_part_info,
Field *field);
bool is_children_attached(void); bool is_children_attached(void);
inline void enable_keyread() inline void enable_keyread()
{ {