mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 20:12:31 +01:00
117 lines
1.8 KiB
Text
117 lines
1.8 KiB
Text
drop table if exists x1;
|
|
drop table if exists x2;
|
|
set @tmp_subselect_nulls=@@optimizer_switch;
|
|
set optimizer_switch='semijoin=off';
|
|
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
|
|
set optimizer_switch= @tmp_subselect_nulls;
|
|
drop table x1;
|
|
drop table x2;
|