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mirror of https://github.com/MariaDB/server.git synced 2025-08-07 00:04:31 +03:00
This commit is contained in:
Sergey Petrunya
2011-11-02 19:37:26 +04:00
2 changed files with 8 additions and 8 deletions

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

View File

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