Re: Why there is no records?

On 2/16/26 15:59, Igor Korot wrote:
> Hi,
>
> draft=# SELECT n.nspname, c.oid FROM pg_constraint c, pg_namespace n
> WHERE c.oid = n.oid AND c.conname = 'leagues_pkey';

Because you are doing:

c.oid = n.oid

which is comparing the pg_constraint.oid to the pg_namespace.oid which
are not the same thing.

You need:

c.connamespace = n.oid

> nspname | oid
> ---------+-----
> (0 rows)
>
> draft=# SELECT * FROM pg_constraint WHERE conname = 'leagues_pkey';
> oid | conname | connamespace | contype | condeferrable |
> condeferred | convalidated | conrelid | contypid | conindid |
> conparentid | confrelid | confupdtype | confdeltype | confmatchtype |
> conislocal | coninhcount | connoinherit | conkey | confkey | conpfeqop
> | conppeqop | conffeqop | confdelsetcols | conexclop | conbin
> -------+--------------+--------------+---------+---------------+-------------+--------------+----------+----------+----------+-------------+-----------+-------------+-------------+---------------+------------+-------------+--------------+--------+---------+-----------+-----------+-----------+----------------+-----------+--------
> 16395 | leagues_pkey | 2200 | p | f | f
> | t | 16390 | 0 | 16394 | 0 |
> 0 | | | | t |
> 0 | t | {1} | | | |
> | | |
> (1 row)
>
> Thank you.
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com