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fixing EXPLAIN select types

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unknown
2002-10-03 18:47:04 +03:00
parent c9a2b58986
commit f094b6af4c
25 changed files with 189 additions and 187 deletions
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30
mysql-test/r/join_outer.result
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@ -91,11 +91,11 @@ grp a c id a c d
NULL NULL NULL NULL NULL NULL
explain select t1.*,t2.* from t1,t2 where t1.a=t2.a and isnull(t2.a)=1;
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST Impossible WHERE noticed after reading const tables
1 SIMPLE Impossible WHERE noticed after reading const tables
explain select t1.*,t2.* from t1 left join t2 on t1.a=t2.a where isnull(t2.a)=1;
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 7
1 FIRST t2 eq_ref PRIMARY PRIMARY 8 t1.a 1 where used
1 SIMPLE t1 ALL NULL NULL NULL NULL 7
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 8 t1.a 1 where used
select t1.*,t2.*,t3.a from t1 left join t2 on (t1.a=t2.a) left join t1 as t3 on (t2.a=t3.a);
grp a c id a c d a
1 1 a 1 1 a 1 1
@ -312,12 +312,12 @@ name name id
Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.id is null;
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 3
1 FIRST t2 ALL NULL NULL NULL NULL 3 where used; Not exists
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 where used; Not exists
explain select t1.name, t2.name, t2.id from t1 left join t2 on (t1.id = t2.owner) where t2.name is null;
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 3
1 FIRST t2 ALL NULL NULL NULL NULL 3 where used
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 where used
select count(*) from t1 left join t2 on (t1.id = t2.owner);
count(*)
4
@ -332,12 +332,12 @@ name name id
Lilliana Angelovska NULL NULL
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.id is null;
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 3
1 FIRST t2 ALL NULL NULL NULL NULL 3 where used; Not exists
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 where used; Not exists
explain select t1.name, t2.name, t2.id from t2 right join t1 on (t1.id = t2.owner) where t2.name is null;
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 3
1 FIRST t2 ALL NULL NULL NULL NULL 3 where used
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 where used
select count(*) from t2 right join t1 on (t1.id = t2.owner);
count(*)
4
@ -619,8 +619,8 @@ UNIQUE id (id,idx)
INSERT INTO t2 VALUES (1,1);
explain SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t1 ALL NULL NULL NULL NULL 2
1 FIRST t2 index id id 8 NULL 1 where used; Using index; Not exists
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
1 SIMPLE t2 index id id 8 NULL 1 where used; Using index; Not exists
SELECT * from t1 left join t2 on t1.id=t2.id where t2.id IS NULL;
id name id idx
2 no NULL NULL
@ -639,8 +639,8 @@ insert into t1 (fooID) values (10),(20),(30);
insert into t2 values (10,1),(20,2),(30,3);
explain select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30;
id select_type table type possible_keys key key_len ref rows Extra
1 FIRST t2 index NULL PRIMARY 4 NULL 3 Using index
1 FIRST t1 eq_ref PRIMARY PRIMARY 2 const 1 where used; Using index
1 SIMPLE t2 index NULL PRIMARY 4 NULL 3 Using index
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 2 const 1 where used; Using index
select * from t2 left join t1 on t1.fooID = t2.fooID and t1.fooID = 30;
fooID barID fooID
10 1 NULL