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bugfix: join a=b where cast(a as type_of_b) can produce NULL
optimizer implicitly assumed that if `a` in `a=b` is not NULL, then it's safe to convert `a` to the type of `b` and search the result in the index(b). which is not always the case, as converting a non-null value to a different type might produce NULL. And searching for NULL in the index might find NULL there, so NULL will be equal to NULL, making `a=b` behave as if it was `a<=>b`
This commit is contained in:
Sergei Golubchik
@@ -1698,7 +1698,7 @@ Subquery_cache_miss 18
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show status like '%Handler_read%';
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show status like '%Handler_read%';
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Variable_name Value
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Variable_name Value
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Handler_read_first 0
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Handler_read_first 0
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Handler_read_key 32
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Handler_read_key 29
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Handler_read_last 0
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Handler_read_last 0
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Handler_read_next 0
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Handler_read_next 0
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Handler_read_prev 0
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Handler_read_prev 0
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@@ -1763,7 +1763,7 @@ Subquery_cache_miss 10
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show status like '%Handler_read%';
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show status like '%Handler_read%';
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Variable_name Value
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Variable_name Value
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Handler_read_first 0
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Handler_read_first 0
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Handler_read_key 13
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Handler_read_key 12
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Handler_read_last 0
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Handler_read_last 0
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Handler_read_next 0
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Handler_read_next 0
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Handler_read_prev 0
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Handler_read_prev 0
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@@ -288,7 +288,11 @@ t2 CREATE TABLE `t2` (
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`b` int(11) NOT NULL,
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`b` int(11) NOT NULL,
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KEY `a` (`a`)
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KEY `a` (`a`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
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) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
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select * from t1, t2 where t1.a=t2.a;
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explain select * from t1 left join t2 on (t1.a=t2.a);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 64
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1 SIMPLE t2 ref a a 17 test.t1.a 1 Using where
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select * from t1 left join t2 on (t1.a=t2.a);
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a b a b
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a b a b
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11223344-5566-0777-0888-99aabbccddee 0 11223344-5566-0777-0888-99aabbccddee 0
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11223344-5566-0777-0888-99aabbccddee 0 11223344-5566-0777-0888-99aabbccddee 0
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11223344-5566-0777-8888-99aabbccddee 1 11223344-5566-0777-8888-99aabbccddee 1
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11223344-5566-0777-8888-99aabbccddee 1 11223344-5566-0777-8888-99aabbccddee 1
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@@ -346,6 +350,345 @@ a b a b
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11223344-5566-f777-8888-99aabbccddee 61 11223344-5566-f777-8888-99aabbccddee 61
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11223344-5566-f777-8888-99aabbccddee 61 11223344-5566-f777-8888-99aabbccddee 61
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11223344-5566-f777-c888-99aabbccddee 62 11223344-5566-f777-c888-99aabbccddee 62
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11223344-5566-f777-c888-99aabbccddee 62 11223344-5566-f777-c888-99aabbccddee 62
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11223344-5566-f777-e888-99aabbccddee 63 11223344-5566-f777-e888-99aabbccddee 63
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11223344-5566-f777-e888-99aabbccddee 63 11223344-5566-f777-e888-99aabbccddee 63
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NULL 32 NULL NULL
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NULL 36 NULL NULL
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NULL 40 NULL NULL
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NULL 44 NULL NULL
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NULL 48 NULL NULL
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NULL 52 NULL NULL
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NULL 56 NULL NULL
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NULL 60 NULL NULL
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explain select * from t1 left join t2 on (t1.a<=>t2.a);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 64
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1 SIMPLE t2 ref a a 17 test.t1.a 1 Using where
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select * from t1 left join t2 on (t1.a<=>t2.a);
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a b a b
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11223344-5566-0777-0888-99aabbccddee 0 11223344-5566-0777-0888-99aabbccddee 0
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11223344-5566-0777-8888-99aabbccddee 1 11223344-5566-0777-8888-99aabbccddee 1
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11223344-5566-0777-c888-99aabbccddee 2 11223344-5566-0777-c888-99aabbccddee 2
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11223344-5566-0777-e888-99aabbccddee 3 11223344-5566-0777-e888-99aabbccddee 3
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11223344-5566-1777-0888-99aabbccddee 4 11223344-5566-1777-0888-99aabbccddee 4
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11223344-5566-1777-8888-99aabbccddee 5 11223344-5566-1777-8888-99aabbccddee 5
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11223344-5566-1777-c888-99aabbccddee 6 11223344-5566-1777-c888-99aabbccddee 6
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11223344-5566-1777-e888-99aabbccddee 7 11223344-5566-1777-e888-99aabbccddee 7
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11223344-5566-2777-0888-99aabbccddee 8 11223344-5566-2777-0888-99aabbccddee 8
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11223344-5566-2777-8888-99aabbccddee 9 11223344-5566-2777-8888-99aabbccddee 9
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11223344-5566-2777-c888-99aabbccddee 10 11223344-5566-2777-c888-99aabbccddee 10
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11223344-5566-2777-e888-99aabbccddee 11 11223344-5566-2777-e888-99aabbccddee 11
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11223344-5566-3777-0888-99aabbccddee 12 11223344-5566-3777-0888-99aabbccddee 12
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11223344-5566-3777-8888-99aabbccddee 13 11223344-5566-3777-8888-99aabbccddee 13
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11223344-5566-3777-c888-99aabbccddee 14 11223344-5566-3777-c888-99aabbccddee 14
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11223344-5566-3777-e888-99aabbccddee 15 11223344-5566-3777-e888-99aabbccddee 15
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11223344-5566-4777-0888-99aabbccddee 16 11223344-5566-4777-0888-99aabbccddee 16
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11223344-5566-4777-8888-99aabbccddee 17 11223344-5566-4777-8888-99aabbccddee 17
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11223344-5566-4777-c888-99aabbccddee 18 11223344-5566-4777-c888-99aabbccddee 18
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11223344-5566-4777-e888-99aabbccddee 19 11223344-5566-4777-e888-99aabbccddee 19
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11223344-5566-5777-0888-99aabbccddee 20 11223344-5566-5777-0888-99aabbccddee 20
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11223344-5566-5777-8888-99aabbccddee 21 11223344-5566-5777-8888-99aabbccddee 21
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11223344-5566-5777-c888-99aabbccddee 22 11223344-5566-5777-c888-99aabbccddee 22
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11223344-5566-5777-e888-99aabbccddee 23 11223344-5566-5777-e888-99aabbccddee 23
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11223344-5566-6777-0888-99aabbccddee 24 11223344-5566-6777-0888-99aabbccddee 24
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11223344-5566-6777-8888-99aabbccddee 25 11223344-5566-6777-8888-99aabbccddee 25
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11223344-5566-6777-c888-99aabbccddee 26 11223344-5566-6777-c888-99aabbccddee 26
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11223344-5566-6777-e888-99aabbccddee 27 11223344-5566-6777-e888-99aabbccddee 27
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11223344-5566-7777-0888-99aabbccddee 28 11223344-5566-7777-0888-99aabbccddee 28
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11223344-5566-7777-8888-99aabbccddee 29 11223344-5566-7777-8888-99aabbccddee 29
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11223344-5566-7777-c888-99aabbccddee 30 11223344-5566-7777-c888-99aabbccddee 30
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11223344-5566-7777-e888-99aabbccddee 31 11223344-5566-7777-e888-99aabbccddee 31
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11223344-5566-8777-8888-99aabbccddee 33 11223344-5566-8777-8888-99aabbccddee 33
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11223344-5566-8777-c888-99aabbccddee 34 11223344-5566-8777-c888-99aabbccddee 34
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11223344-5566-8777-e888-99aabbccddee 35 11223344-5566-8777-e888-99aabbccddee 35
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11223344-5566-9777-8888-99aabbccddee 37 11223344-5566-9777-8888-99aabbccddee 37
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11223344-5566-9777-c888-99aabbccddee 38 11223344-5566-9777-c888-99aabbccddee 38
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11223344-5566-9777-e888-99aabbccddee 39 11223344-5566-9777-e888-99aabbccddee 39
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11223344-5566-a777-8888-99aabbccddee 41 11223344-5566-a777-8888-99aabbccddee 41
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11223344-5566-a777-c888-99aabbccddee 42 11223344-5566-a777-c888-99aabbccddee 42
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11223344-5566-a777-e888-99aabbccddee 43 11223344-5566-a777-e888-99aabbccddee 43
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11223344-5566-b777-8888-99aabbccddee 45 11223344-5566-b777-8888-99aabbccddee 45
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11223344-5566-b777-c888-99aabbccddee 46 11223344-5566-b777-c888-99aabbccddee 46
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11223344-5566-b777-e888-99aabbccddee 47 11223344-5566-b777-e888-99aabbccddee 47
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11223344-5566-c777-8888-99aabbccddee 49 11223344-5566-c777-8888-99aabbccddee 49
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11223344-5566-c777-c888-99aabbccddee 50 11223344-5566-c777-c888-99aabbccddee 50
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11223344-5566-c777-e888-99aabbccddee 51 11223344-5566-c777-e888-99aabbccddee 51
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11223344-5566-d777-8888-99aabbccddee 53 11223344-5566-d777-8888-99aabbccddee 53
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11223344-5566-d777-c888-99aabbccddee 54 11223344-5566-d777-c888-99aabbccddee 54
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11223344-5566-d777-e888-99aabbccddee 55 11223344-5566-d777-e888-99aabbccddee 55
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11223344-5566-e777-8888-99aabbccddee 57 11223344-5566-e777-8888-99aabbccddee 57
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11223344-5566-e777-c888-99aabbccddee 58 11223344-5566-e777-c888-99aabbccddee 58
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11223344-5566-e777-e888-99aabbccddee 59 11223344-5566-e777-e888-99aabbccddee 59
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11223344-5566-f777-8888-99aabbccddee 61 11223344-5566-f777-8888-99aabbccddee 61
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11223344-5566-f777-c888-99aabbccddee 62 11223344-5566-f777-c888-99aabbccddee 62
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11223344-5566-f777-e888-99aabbccddee 63 11223344-5566-f777-e888-99aabbccddee 63
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NULL 32 NULL NULL
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NULL 36 NULL NULL
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NULL 40 NULL NULL
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NULL 44 NULL NULL
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NULL 48 NULL NULL
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NULL 52 NULL NULL
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NULL 56 NULL NULL
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NULL 60 NULL NULL
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explain select * from t2 left join t1 on (t1.a=t2.a);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 64
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1 SIMPLE t1 ref a a 17 test.t2.a 1 Using where
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select * from t2 left join t1 on (t1.a=t2.a);
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a b a b
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11223344-5566-0777-0888-99aabbccddee 0 11223344-5566-0777-0888-99aabbccddee 0
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11223344-5566-0777-8888-99aabbccddee 1 11223344-5566-0777-8888-99aabbccddee 1
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11223344-5566-0777-c888-99aabbccddee 2 11223344-5566-0777-c888-99aabbccddee 2
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11223344-5566-0777-e888-99aabbccddee 3 11223344-5566-0777-e888-99aabbccddee 3
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11223344-5566-1777-0888-99aabbccddee 4 11223344-5566-1777-0888-99aabbccddee 4
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11223344-5566-1777-8888-99aabbccddee 5 11223344-5566-1777-8888-99aabbccddee 5
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11223344-5566-1777-c888-99aabbccddee 6 11223344-5566-1777-c888-99aabbccddee 6
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11223344-5566-1777-e888-99aabbccddee 7 11223344-5566-1777-e888-99aabbccddee 7
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11223344-5566-2777-0888-99aabbccddee 8 11223344-5566-2777-0888-99aabbccddee 8
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11223344-5566-6777-c888-99aabbccddee 26 11223344-5566-6777-c888-99aabbccddee 26
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11223344-5566-6777-e888-99aabbccddee 27 11223344-5566-6777-e888-99aabbccddee 27
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11223344-5566-7777-0888-99aabbccddee 28 11223344-5566-7777-0888-99aabbccddee 28
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11223344-5566-7777-c888-99aabbccddee 30 11223344-5566-7777-c888-99aabbccddee 30
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11223344-5566-8777-0888-99aabbccddee 32 NULL NULL
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11223344-5566-8777-8888-99aabbccddee 33 11223344-5566-8777-8888-99aabbccddee 33
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11223344-5566-9777-0888-99aabbccddee 36 NULL NULL
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11223344-5566-9777-8888-99aabbccddee 37 11223344-5566-9777-8888-99aabbccddee 37
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11223344-5566-a777-0888-99aabbccddee 40 NULL NULL
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11223344-5566-a777-8888-99aabbccddee 41 11223344-5566-a777-8888-99aabbccddee 41
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11223344-5566-b777-0888-99aabbccddee 44 NULL NULL
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11223344-5566-b777-8888-99aabbccddee 45 11223344-5566-b777-8888-99aabbccddee 45
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11223344-5566-c777-0888-99aabbccddee 48 NULL NULL
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11223344-5566-d777-0888-99aabbccddee 52 NULL NULL
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11223344-5566-e777-0888-99aabbccddee 56 NULL NULL
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11223344-5566-f777-0888-99aabbccddee 60 NULL NULL
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||||||
|
11223344-5566-f777-8888-99aabbccddee 61 11223344-5566-f777-8888-99aabbccddee 61
|
||||||
|
11223344-5566-f777-c888-99aabbccddee 62 11223344-5566-f777-c888-99aabbccddee 62
|
||||||
|
11223344-5566-f777-e888-99aabbccddee 63 11223344-5566-f777-e888-99aabbccddee 63
|
||||||
|
explain select * from t2 left join t1 on (t1.a<=>t2.a);
|
||||||
|
id select_type table type possible_keys key key_len ref rows Extra
|
||||||
|
1 SIMPLE t2 ALL NULL NULL NULL NULL 64
|
||||||
|
1 SIMPLE t1 ref a a 17 test.t2.a 1 Using where
|
||||||
|
select * from t2 left join t1 on (t1.a<=>t2.a);
|
||||||
|
a b a b
|
||||||
|
11223344-5566-0777-0888-99aabbccddee 0 11223344-5566-0777-0888-99aabbccddee 0
|
||||||
|
11223344-5566-0777-8888-99aabbccddee 1 11223344-5566-0777-8888-99aabbccddee 1
|
||||||
|
11223344-5566-0777-c888-99aabbccddee 2 11223344-5566-0777-c888-99aabbccddee 2
|
||||||
|
11223344-5566-0777-e888-99aabbccddee 3 11223344-5566-0777-e888-99aabbccddee 3
|
||||||
|
11223344-5566-1777-0888-99aabbccddee 4 11223344-5566-1777-0888-99aabbccddee 4
|
||||||
|
11223344-5566-1777-8888-99aabbccddee 5 11223344-5566-1777-8888-99aabbccddee 5
|
||||||
|
11223344-5566-1777-c888-99aabbccddee 6 11223344-5566-1777-c888-99aabbccddee 6
|
||||||
|
11223344-5566-1777-e888-99aabbccddee 7 11223344-5566-1777-e888-99aabbccddee 7
|
||||||
|
11223344-5566-2777-0888-99aabbccddee 8 11223344-5566-2777-0888-99aabbccddee 8
|
||||||
|
11223344-5566-2777-8888-99aabbccddee 9 11223344-5566-2777-8888-99aabbccddee 9
|
||||||
|
11223344-5566-2777-c888-99aabbccddee 10 11223344-5566-2777-c888-99aabbccddee 10
|
||||||
|
11223344-5566-2777-e888-99aabbccddee 11 11223344-5566-2777-e888-99aabbccddee 11
|
||||||
|
11223344-5566-3777-0888-99aabbccddee 12 11223344-5566-3777-0888-99aabbccddee 12
|
||||||
|
11223344-5566-3777-8888-99aabbccddee 13 11223344-5566-3777-8888-99aabbccddee 13
|
||||||
|
11223344-5566-3777-c888-99aabbccddee 14 11223344-5566-3777-c888-99aabbccddee 14
|
||||||
|
11223344-5566-3777-e888-99aabbccddee 15 11223344-5566-3777-e888-99aabbccddee 15
|
||||||
|
11223344-5566-4777-0888-99aabbccddee 16 11223344-5566-4777-0888-99aabbccddee 16
|
||||||
|
11223344-5566-4777-8888-99aabbccddee 17 11223344-5566-4777-8888-99aabbccddee 17
|
||||||
|
11223344-5566-4777-c888-99aabbccddee 18 11223344-5566-4777-c888-99aabbccddee 18
|
||||||
|
11223344-5566-4777-e888-99aabbccddee 19 11223344-5566-4777-e888-99aabbccddee 19
|
||||||
|
11223344-5566-5777-0888-99aabbccddee 20 11223344-5566-5777-0888-99aabbccddee 20
|
||||||
|
11223344-5566-5777-8888-99aabbccddee 21 11223344-5566-5777-8888-99aabbccddee 21
|
||||||
|
11223344-5566-5777-c888-99aabbccddee 22 11223344-5566-5777-c888-99aabbccddee 22
|
||||||
|
11223344-5566-5777-e888-99aabbccddee 23 11223344-5566-5777-e888-99aabbccddee 23
|
||||||
|
11223344-5566-6777-0888-99aabbccddee 24 11223344-5566-6777-0888-99aabbccddee 24
|
||||||
|
11223344-5566-6777-8888-99aabbccddee 25 11223344-5566-6777-8888-99aabbccddee 25
|
||||||
|
11223344-5566-6777-c888-99aabbccddee 26 11223344-5566-6777-c888-99aabbccddee 26
|
||||||
|
11223344-5566-6777-e888-99aabbccddee 27 11223344-5566-6777-e888-99aabbccddee 27
|
||||||
|
11223344-5566-7777-0888-99aabbccddee 28 11223344-5566-7777-0888-99aabbccddee 28
|
||||||
|
11223344-5566-7777-8888-99aabbccddee 29 11223344-5566-7777-8888-99aabbccddee 29
|
||||||
|
11223344-5566-7777-c888-99aabbccddee 30 11223344-5566-7777-c888-99aabbccddee 30
|
||||||
|
11223344-5566-7777-e888-99aabbccddee 31 11223344-5566-7777-e888-99aabbccddee 31
|
||||||
|
11223344-5566-8777-0888-99aabbccddee 32 NULL 32
|
||||||
|
11223344-5566-8777-0888-99aabbccddee 32 NULL 36
|
||||||
|
11223344-5566-8777-0888-99aabbccddee 32 NULL 40
|
||||||
|
11223344-5566-8777-0888-99aabbccddee 32 NULL 44
|
||||||
|
11223344-5566-8777-0888-99aabbccddee 32 NULL 48
|
||||||
|
11223344-5566-8777-0888-99aabbccddee 32 NULL 52
|
||||||
|
11223344-5566-8777-0888-99aabbccddee 32 NULL 56
|
||||||
|
11223344-5566-8777-0888-99aabbccddee 32 NULL 60
|
||||||
|
11223344-5566-8777-8888-99aabbccddee 33 11223344-5566-8777-8888-99aabbccddee 33
|
||||||
|
11223344-5566-8777-c888-99aabbccddee 34 11223344-5566-8777-c888-99aabbccddee 34
|
||||||
|
11223344-5566-8777-e888-99aabbccddee 35 11223344-5566-8777-e888-99aabbccddee 35
|
||||||
|
11223344-5566-9777-0888-99aabbccddee 36 NULL 32
|
||||||
|
11223344-5566-9777-0888-99aabbccddee 36 NULL 36
|
||||||
|
11223344-5566-9777-0888-99aabbccddee 36 NULL 40
|
||||||
|
11223344-5566-9777-0888-99aabbccddee 36 NULL 44
|
||||||
|
11223344-5566-9777-0888-99aabbccddee 36 NULL 48
|
||||||
|
11223344-5566-9777-0888-99aabbccddee 36 NULL 52
|
||||||
|
11223344-5566-9777-0888-99aabbccddee 36 NULL 56
|
||||||
|
11223344-5566-9777-0888-99aabbccddee 36 NULL 60
|
||||||
|
11223344-5566-9777-8888-99aabbccddee 37 11223344-5566-9777-8888-99aabbccddee 37
|
||||||
|
11223344-5566-9777-c888-99aabbccddee 38 11223344-5566-9777-c888-99aabbccddee 38
|
||||||
|
11223344-5566-9777-e888-99aabbccddee 39 11223344-5566-9777-e888-99aabbccddee 39
|
||||||
|
11223344-5566-a777-0888-99aabbccddee 40 NULL 32
|
||||||
|
11223344-5566-a777-0888-99aabbccddee 40 NULL 36
|
||||||
|
11223344-5566-a777-0888-99aabbccddee 40 NULL 40
|
||||||
|
11223344-5566-a777-0888-99aabbccddee 40 NULL 44
|
||||||
|
11223344-5566-a777-0888-99aabbccddee 40 NULL 48
|
||||||
|
11223344-5566-a777-0888-99aabbccddee 40 NULL 52
|
||||||
|
11223344-5566-a777-0888-99aabbccddee 40 NULL 56
|
||||||
|
11223344-5566-a777-0888-99aabbccddee 40 NULL 60
|
||||||
|
11223344-5566-a777-8888-99aabbccddee 41 11223344-5566-a777-8888-99aabbccddee 41
|
||||||
|
11223344-5566-a777-c888-99aabbccddee 42 11223344-5566-a777-c888-99aabbccddee 42
|
||||||
|
11223344-5566-a777-e888-99aabbccddee 43 11223344-5566-a777-e888-99aabbccddee 43
|
||||||
|
11223344-5566-b777-0888-99aabbccddee 44 NULL 32
|
||||||
|
11223344-5566-b777-0888-99aabbccddee 44 NULL 36
|
||||||
|
11223344-5566-b777-0888-99aabbccddee 44 NULL 40
|
||||||
|
11223344-5566-b777-0888-99aabbccddee 44 NULL 44
|
||||||
|
11223344-5566-b777-0888-99aabbccddee 44 NULL 48
|
||||||
|
11223344-5566-b777-0888-99aabbccddee 44 NULL 52
|
||||||
|
11223344-5566-b777-0888-99aabbccddee 44 NULL 56
|
||||||
|
11223344-5566-b777-0888-99aabbccddee 44 NULL 60
|
||||||
|
11223344-5566-b777-8888-99aabbccddee 45 11223344-5566-b777-8888-99aabbccddee 45
|
||||||
|
11223344-5566-b777-c888-99aabbccddee 46 11223344-5566-b777-c888-99aabbccddee 46
|
||||||
|
11223344-5566-b777-e888-99aabbccddee 47 11223344-5566-b777-e888-99aabbccddee 47
|
||||||
|
11223344-5566-c777-0888-99aabbccddee 48 NULL 32
|
||||||
|
11223344-5566-c777-0888-99aabbccddee 48 NULL 36
|
||||||
|
11223344-5566-c777-0888-99aabbccddee 48 NULL 40
|
||||||
|
11223344-5566-c777-0888-99aabbccddee 48 NULL 44
|
||||||
|
11223344-5566-c777-0888-99aabbccddee 48 NULL 48
|
||||||
|
11223344-5566-c777-0888-99aabbccddee 48 NULL 52
|
||||||
|
11223344-5566-c777-0888-99aabbccddee 48 NULL 56
|
||||||
|
11223344-5566-c777-0888-99aabbccddee 48 NULL 60
|
||||||
|
11223344-5566-c777-8888-99aabbccddee 49 11223344-5566-c777-8888-99aabbccddee 49
|
||||||
|
11223344-5566-c777-c888-99aabbccddee 50 11223344-5566-c777-c888-99aabbccddee 50
|
||||||
|
11223344-5566-c777-e888-99aabbccddee 51 11223344-5566-c777-e888-99aabbccddee 51
|
||||||
|
11223344-5566-d777-0888-99aabbccddee 52 NULL 32
|
||||||
|
11223344-5566-d777-0888-99aabbccddee 52 NULL 36
|
||||||
|
11223344-5566-d777-0888-99aabbccddee 52 NULL 40
|
||||||
|
11223344-5566-d777-0888-99aabbccddee 52 NULL 44
|
||||||
|
11223344-5566-d777-0888-99aabbccddee 52 NULL 48
|
||||||
|
11223344-5566-d777-0888-99aabbccddee 52 NULL 52
|
||||||
|
11223344-5566-d777-0888-99aabbccddee 52 NULL 56
|
||||||
|
11223344-5566-d777-0888-99aabbccddee 52 NULL 60
|
||||||
|
11223344-5566-d777-8888-99aabbccddee 53 11223344-5566-d777-8888-99aabbccddee 53
|
||||||
|
11223344-5566-d777-c888-99aabbccddee 54 11223344-5566-d777-c888-99aabbccddee 54
|
||||||
|
11223344-5566-d777-e888-99aabbccddee 55 11223344-5566-d777-e888-99aabbccddee 55
|
||||||
|
11223344-5566-e777-0888-99aabbccddee 56 NULL 32
|
||||||
|
11223344-5566-e777-0888-99aabbccddee 56 NULL 36
|
||||||
|
11223344-5566-e777-0888-99aabbccddee 56 NULL 40
|
||||||
|
11223344-5566-e777-0888-99aabbccddee 56 NULL 44
|
||||||
|
11223344-5566-e777-0888-99aabbccddee 56 NULL 48
|
||||||
|
11223344-5566-e777-0888-99aabbccddee 56 NULL 52
|
||||||
|
11223344-5566-e777-0888-99aabbccddee 56 NULL 56
|
||||||
|
11223344-5566-e777-0888-99aabbccddee 56 NULL 60
|
||||||
|
11223344-5566-e777-8888-99aabbccddee 57 11223344-5566-e777-8888-99aabbccddee 57
|
||||||
|
11223344-5566-e777-c888-99aabbccddee 58 11223344-5566-e777-c888-99aabbccddee 58
|
||||||
|
11223344-5566-e777-e888-99aabbccddee 59 11223344-5566-e777-e888-99aabbccddee 59
|
||||||
|
11223344-5566-f777-0888-99aabbccddee 60 NULL 32
|
||||||
|
11223344-5566-f777-0888-99aabbccddee 60 NULL 36
|
||||||
|
11223344-5566-f777-0888-99aabbccddee 60 NULL 40
|
||||||
|
11223344-5566-f777-0888-99aabbccddee 60 NULL 44
|
||||||
|
11223344-5566-f777-0888-99aabbccddee 60 NULL 48
|
||||||
|
11223344-5566-f777-0888-99aabbccddee 60 NULL 52
|
||||||
|
11223344-5566-f777-0888-99aabbccddee 60 NULL 56
|
||||||
|
11223344-5566-f777-0888-99aabbccddee 60 NULL 60
|
||||||
|
11223344-5566-f777-8888-99aabbccddee 61 11223344-5566-f777-8888-99aabbccddee 61
|
||||||
|
11223344-5566-f777-c888-99aabbccddee 62 11223344-5566-f777-c888-99aabbccddee 62
|
||||||
|
11223344-5566-f777-e888-99aabbccddee 63 11223344-5566-f777-e888-99aabbccddee 63
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-8777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-8777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-8777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-8777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-8777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-8777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-8777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-8777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-8777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-9777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-9777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-9777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-9777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-9777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-9777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-9777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-9777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-9777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-a777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-a777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-a777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-a777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-a777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-a777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-a777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-a777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-a777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-b777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-b777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-b777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-b777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-b777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-b777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-b777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-b777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-b777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-c777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-c777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-c777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-c777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-c777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-c777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-c777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-c777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-c777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-d777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-d777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-d777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-d777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-d777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-d777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-d777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-d777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-d777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-e777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-e777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-e777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-e777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-e777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-e777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-e777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-e777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-e777-0888-99aabbccddee'
|
||||||
|
Warning 1292 Incorrect uuid value: '11223344-5566-f777-0888-99aabbccddee'
|
||||||
|
Warnings:
|
||||||
select * from t1 union select * from t2;
|
select * from t1 union select * from t2;
|
||||||
a b
|
a b
|
||||||
11223344-5566-0777-0888-99aabbccddee 0
|
11223344-5566-0777-0888-99aabbccddee 0
|
||||||
|
|||||||
@@ -16,7 +16,21 @@ select * from t2;
|
|||||||
select * from t2 order by a;
|
select * from t2 order by a;
|
||||||
show create table t2;
|
show create table t2;
|
||||||
|
|
||||||
select * from t1, t2 where t1.a=t2.a;
|
explain select * from t1 left join t2 on (t1.a=t2.a);
|
||||||
|
--sorted_result
|
||||||
|
select * from t1 left join t2 on (t1.a=t2.a);
|
||||||
|
|
||||||
|
explain select * from t1 left join t2 on (t1.a<=>t2.a);
|
||||||
|
--sorted_result
|
||||||
|
select * from t1 left join t2 on (t1.a<=>t2.a);
|
||||||
|
|
||||||
|
explain select * from t2 left join t1 on (t1.a=t2.a);
|
||||||
|
--sorted_result
|
||||||
|
select * from t2 left join t1 on (t1.a=t2.a);
|
||||||
|
|
||||||
|
explain select * from t2 left join t1 on (t1.a<=>t2.a);
|
||||||
|
--sorted_result
|
||||||
|
select * from t2 left join t1 on (t1.a<=>t2.a);
|
||||||
|
|
||||||
--sorted_result
|
--sorted_result
|
||||||
select * from t1 union select * from t2;
|
select * from t1 union select * from t2;
|
||||||
|
|||||||
@@ -25562,7 +25562,8 @@ cp_buffer_from_ref(THD *thd, TABLE *table, TABLE_REF *ref)
|
|||||||
thd->count_cuted_fields= CHECK_FIELD_IGNORE;
|
thd->count_cuted_fields= CHECK_FIELD_IGNORE;
|
||||||
for (store_key **copy=ref->key_copy ; *copy ; copy++)
|
for (store_key **copy=ref->key_copy ; *copy ; copy++)
|
||||||
{
|
{
|
||||||
if ((*copy)->copy(thd) & 1)
|
if ((*copy)->copy(thd) & 1 ||
|
||||||
|
(ref->null_rejecting && (*copy)->null_key))
|
||||||
{
|
{
|
||||||
result= 1;
|
result= 1;
|
||||||
break;
|
break;
|
||||||
|
|||||||
Reference in New Issue
Block a user