On Fri, Jun 13, 2003 at 20:45:06 +0200,
Ryszard Lach <siaco@autograf.pl> wrote:
> I can't understand where comes the big difference in query plan from, and
> (that's more important) - how to force postgres 7.3 to execute it more
> efficient?
I am guessing that your are really using 7.3.x and not 7.3. There was
a bug in 7.3 that was fixed in 7.3.1 or 7.3.2 with subselects. However
this fix was made with safety in mind (as it was a point release)
and resulted in some queries running slower. A complete fix was made for
7.4. To test to see if this is really the problem, you could try a 7.4
snapshot or 7.3 to see if you get improved plans.