Re: Optimizing NOT IN plans / verify rewrite - Mailing list pgsql-performance

Hi,

On Mon, Aug 02, 2010 at 12:12:51PM -0700, Maciek Sakrejda wrote:
> I'm running PostgreSQL 8.3 and I have a query with a couple of NOT IN
> subqueries:
With 8.3 you will have to use manual antijoins (i.e LEFT JOIN
... WHERE NULL). If you use 8.4 NOT EXISTS() will do that
automatically in many cases (contrary to NOT IN () which has strange
NULL semantics).

Anbdres