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2004-10-07 08:42:11 +00:00
parent 10cd526ded
commit 1f43673426
2 changed files with 8 additions and 8 deletions

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@ -10,7 +10,7 @@ explain select * from t2 where p NOT IN (select p from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using where
2 DEPENDENT SUBQUERY t1 unique_subquery PRIMARY PRIMARY 4 func 1 Using index
select * from t2 where p NOT IN (select p from t1);
select * from t2 where p NOT IN (select p from t1) order by p;
p u o
4 4 4
5 5 5
@ -18,7 +18,7 @@ explain select * from t2 where p NOT IN (select u from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using where
2 DEPENDENT SUBQUERY t1 unique_subquery u u 4 func 1 Using index
select * from t2 where p NOT IN (select u from t1);
select * from t2 where p NOT IN (select u from t1) order by p;
p u o
4 4 4
5 5 5
@ -26,7 +26,7 @@ explain select * from t2 where p NOT IN (select o from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using where
2 DEPENDENT SUBQUERY t1 index_subquery o o 4 func 1 Using index
select * from t2 where p NOT IN (select o from t1);
select * from t2 where p NOT IN (select o from t1) order by p;
p u o
4 4 4
5 5 5
@ -34,7 +34,7 @@ explain select * from t2 where p NOT IN (select p+0 from t1);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using where
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 Using where
select * from t2 where p NOT IN (select p+0 from t1);
select * from t2 where p NOT IN (select p+0 from t1) order by p;
p u o
4 4 4
5 5 5

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@ -18,19 +18,19 @@ insert into t2 values (1,1,1),(2,2,2),(3,3,3), (4,4,4), (5,5,5);
# Use pk
explain select * from t2 where p NOT IN (select p from t1);
select * from t2 where p NOT IN (select p from t1);
select * from t2 where p NOT IN (select p from t1) order by p;
# Use unique index
explain select * from t2 where p NOT IN (select u from t1);
select * from t2 where p NOT IN (select u from t1);
select * from t2 where p NOT IN (select u from t1) order by p;
# Use ordered index
explain select * from t2 where p NOT IN (select o from t1);
select * from t2 where p NOT IN (select o from t1);
select * from t2 where p NOT IN (select o from t1) order by p;
# Use scan
explain select * from t2 where p NOT IN (select p+0 from t1);
select * from t2 where p NOT IN (select p+0 from t1);
select * from t2 where p NOT IN (select p+0 from t1) order by p;
drop table t1;
drop table t2;