diff options
Diffstat (limited to 'mysql-test/r/subselect.result')
| -rw-r--r-- | mysql-test/r/subselect.result | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result index 3dc1795a65a..8d4a5ee32be 100644 --- a/mysql-test/r/subselect.result +++ b/mysql-test/r/subselect.result @@ -904,8 +904,8 @@ a t1.a in (select t2.a from t2,t3 where t3.a=t2.a) explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) FROM t1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index -2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using where; Using index; Using join cache -2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where +2 DEPENDENT SUBQUERY t2 ref_or_null a a 5 func 2 100.00 Using where; Using index +2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,<in_optimizer>(`test`.`t1`.`a`,<exists>(select 1 AS `Not_used` from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t2`.`a`) and ((<cache>(`test`.`t1`.`a`) = `test`.`t2`.`a`) or isnull(`test`.`t2`.`a`))) having <is_not_null_test>(`test`.`t2`.`a`))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1` drop table t1,t2,t3; @@ -1354,8 +1354,8 @@ a explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 index NULL a 5 NULL 4 100.00 Using where; Using index -2 DEPENDENT SUBQUERY t1 ref a a 5 func 1001 100.00 Using where; Using index; Using join cache -2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 100.00 Using where; Using index +2 DEPENDENT SUBQUERY t1 ref a a 5 func 1001 100.00 Using where; Using index +2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 100.00 Using where; Using index; Using join buffer Warnings: Note 1003 select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(select 1 AS `Not_used` from `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`a` = `test`.`t1`.`b`) and (<cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`)))) insert into t1 values (3,31); @@ -4071,6 +4071,16 @@ id st 2 GA 4 FL DROP TABLE t1,t2; +CREATE TABLE t1 (a int); +INSERT INTO t1 VALUES (1), (2); +EXPLAIN EXTENDED +SELECT * FROM (SELECT count(*) FROM t1 GROUP BY a) as res; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00 +2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort +Warnings: +Note 1003 select `res`.`count(*)` AS `count(*)` from (select count(0) AS `count(*)` from `test`.`t1` group by `test`.`t1`.`a`) `res` +DROP TABLE t1; End of 5.0 tests. CREATE TABLE t1 (a int, b int); INSERT INTO t1 VALUES (2,22),(1,11),(2,22); |