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@ -63,8 +63,8 @@ a b c
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3 -3 -3
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explain select * from t1 where b in (select c from t3);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where
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2 DEPENDENT SUBQUERY t3 index_subquery c c 5 func 1 Using index
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1 PRIMARY t3 index c c 5 NULL 3 Using index
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
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# select_type=PRIMARY, type=range,ref
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select * from t1 where c in (select c from t3 where c between -2 and -1);
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a b c
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@ -73,8 +73,8 @@ a b c
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1 -1 -1
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explain select * from t1 where c in (select c from t3 where c between -2 and -1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where
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2 DEPENDENT SUBQUERY t3 index_subquery c c 5 func 1 Using index; Using where
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1 PRIMARY t3 index c c 5 NULL 3 Using where; Using index
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1 PRIMARY t1 ref c c 5 test.t3.c 1
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# select_type=UNION, type=system
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# select_type=UNION RESULT, type=<union1,2>
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select * from t1 union select * from t2;
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@ -63,8 +63,8 @@ a b c
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3 -3 -3
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explain select * from t1 where b in (select c from t3);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where
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2 DEPENDENT SUBQUERY t3 index_subquery c c 5 func 2 Using index
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1 PRIMARY t3 index c c 5 NULL 3 Using index
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
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# select_type=PRIMARY, type=range,ref
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select * from t1 where c in (select c from t3 where c between -2 and -1);
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a b c
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@ -73,8 +73,8 @@ a b c
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1 -1 -1
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explain select * from t1 where c in (select c from t3 where c between -2 and -1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where
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2 DEPENDENT SUBQUERY t3 index_subquery c c 5 func 2 Using index; Using where
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1 PRIMARY t3 index c c 5 NULL 3 Using where; Using index
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1 PRIMARY t1 ref c c 5 test.t3.c 2
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# select_type=UNION, type=system
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# select_type=UNION RESULT, type=<union1,2>
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select * from t1 union select * from t2;
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