USE tpch1;
drop table if exists a1;
drop table if exists a2;
create table a1 (c1 int, c2 int)engine=columnstore;
create table a2 (c1 int, c2 int)engine=columnstore;
insert into a1 values (1, 1),(2,2),(3,null),(null,3),(null,null);
insert into a2 values (1, 1),(2, null),(null, 2),(3, 3),(null, null);
select * from a1 where c1 not in (select c2 from a2);
c1	c2
select * from a1 where c1 not in (select c2 from a2 where a1.c2=a2.c2);
c1	c2
3	NULL
NULL	NULL
select * from a1 where not exists (select c2 from a2 where a1.c2=a2.c2 and a1.c1=a2.c1);
c1	c2
2	2
3	NULL
NULL	3
NULL	NULL
select * from a1 where not exists (select c2 from a2 where a1.c2=a2.c2);
c1	c2
3	NULL
NULL	NULL
select * from a1 where (c1,c2) not in (select c1,c2 from a2 where a2.c1 > a1.c2);
c1	c2
1	1
2	2
3	NULL
NULL	3
NULL	NULL
select * from a1 where c1 not in (select c2 from a2 where a1.c2>a2.c2);
c1	c2
1	1
2	2
3	NULL
NULL	NULL
select * from a1 where c1 not in (select 1 from a2 where a1.c1=a2.c1);
c1	c2
2	2
3	NULL
NULL	3
NULL	NULL
select count(*) from a1 where c1 not in (select c2 from a2 where a1.c2=a2.c2);
count(*)
2
select count(*) from a1 where not exists (select c2 from a2 where a1.c2=a2.c2 and a1.c1=a2.c1);
count(*)
4
drop table a1;
drop table a2;