Thread: BUG #7580: repeatable test case for the BUG #7579

The following bug has been logged on the website:

Bug reference:      7580
Logged by:          Maxim Boguk
Email address:      maxim.boguk@gmail.com
PostgreSQL version: 9.2.1
Operating system:   Linux
Description:        =



create table t1 as select id from generate_series(1,100000) as g(id);
create table t2 as select id from generate_series(1,100000) as g(id);
alter table t1 add primary key (id);
alter table t2 add primary key (id);
analyze t1;
analyze t2;

explain select * from t1
left outer join =

(
  select distinct t2.id from t2 =

  where t2.id>100
) as _t on _t.id=3Dt1.id
where
(t1.id>100  or (t1.id<100 and _t.id IS NOT NULL));

The connection to the server was lost.

maxim.boguk@gmail.com writes:
> create table t1 as select id from generate_series(1,100000) as g(id);
> create table t2 as select id from generate_series(1,100000) as g(id);
> alter table t1 add primary key (id);
> alter table t2 add primary key (id);
> analyze t1;
> analyze t2;

> explain select * from t1
> left outer join
> (
>   select distinct t2.id from t2
>   where t2.id>100
> ) as _t on _t.id=t1.id
> where
> (t1.id>100  or (t1.id<100 and _t.id IS NOT NULL));

> The connection to the server was lost.

Hm, I get an Assert trap in the planner, which means this is probably
my fault.  Will look.

            regards, tom lane