Re: Pushing IN (subquery) down through UNION ALL?

On Thu, Feb 24, 2011 at 12:33 PM, Vik Reykja <vikreykja@gmail.com> wrote:

On Thu, Feb 24, 2011 at 16:14, Dave Johansen <davejohansen@gmail.com> wrote:

You'll notice that the subquery version is doing the full join and then the filtering, but the explicitly listed version pushing the filtering into the plan before the join. Is there a way to make the subquery version perform the same optimization?

EXPLAIN ANALYZE SELECT * FROM addressesall WHERE id = ANY (array(SELECT id FROM users WHERE name='A'));

(Tested on 9.0.3)

I just tested that on 8.3.3 and it performed quickly like I expected the other query to, so that did the trick.

Thanks a ton,