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Backport of subquery optimizations to 5.3.

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There are still test failures because of:
- Wrong query results in outer join + semi join
- EXPLAIN output differences
This commit is contained in:
Sergey Petrunya
2010-01-17 17:51:10 +03:00
parent 1a490f2da4
commit b83cb52e9e
57 changed files with 30727 additions and 504 deletions
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114
mysql-test/r/subselect_nulls.result Normal file
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@ -0,0 +1,114 @@
drop table if exists x1;
drop table if exists x2;
create table x1(k int primary key, d1 int, d2 int);
create table x2(k int primary key, d1 int, d2 int);
insert into x1 values
(10, 10, 10),
(20, 20, 20),
(21, 20, null),
(30, null, 30),
(40, 40, 40);
insert into x2 values
(10, 10, 10),
(20, 20, 20),
(21, 20, null),
(30, null, 30);
select *
from x1
where (d1, d2) in (select d1, d2
from x2);
k d1 d2
10 10 10
20 20 20
select *
from x1
where (d1, d2) in (select d1, d2
from x2) is true;
k d1 d2
10 10 10
20 20 20
select *
from x1
where (d1, d2) in (select d1, d2
from x2) is false;
k d1 d2
40 40 40
select *
from x1
where (d1, d2) in (select d1, d2
from x2) is unknown;
k d1 d2
21 20 NULL
30 NULL 30
select *
from x1
where d1 in (select d1
from x2
where x1.d2=x2.d2);
k d1 d2
10 10 10
20 20 20
select *
from x1
where d1 in (select d1
from x2
where x1.d2=x2.d2) is true;
k d1 d2
10 10 10
20 20 20
select *
from x1
where d1 in (select d1
from x2
where x1.d2=x2.d2) is false;
k d1 d2
21 20 NULL
40 40 40
select *
from x1
where d1 in (select d1
from x2
where x1.d2=x2.d2) is unknown;
k d1 d2
30 NULL 30
select *
from x1
where 1 in (select 1
from x2
where x1.d1=x2.d1 and x1.d2=x2.d2);
k d1 d2
10 10 10
20 20 20
select *
from x1
where 1 in (select 1
from x2
where x1.d1=x2.d1 and x1.d2=x2.d2) is true;
k d1 d2
10 10 10
20 20 20
select *
from x1
where 1 in (select 1
from x2
where x1.d1=x2.d1 and x1.d2=x2.d2) is false;
k d1 d2
21 20 NULL
30 NULL 30
40 40 40
select *
from x1
where 1 in (select 1
from x2
where x1.d1=x2.d1 and x1.d2=x2.d2) is unknown;
k d1 d2
select *
from x1
where exists (select *
from x2
where x1.d1=x2.d1 and x1.d2=x2.d2);
k d1 d2
10 10 10
20 20 20
drop table x1;
drop table x2;