ok. thanks, when my project will move to 8.4, I `ll re-do this test.
________________________________ From: Tom Lane <t...@sss.pgh.pa.us> To: Kevin Grittner <kevin.gritt...@wicourts.gov> Cc: Robert Haas <robertmh...@gmail.com>; assaf lehr <assaf_l...@yahoo.com>; pgsql-bugs@postgresql.org Sent: Thu, November 5, 2009 5:21:28 PM Subject: Re: [BUGS] BUG #5165: Poor performance with Left-join where right side does not exist "Kevin Grittner" <kevin.gritt...@wicourts.gov> writes: > assaf lehr <assaf_l...@yahoo.com> wrote: >> let me explain it better. >> [hand-waving and pseudo-code] > People would like to help you, but you're not providing enough > information to let them. Well, the really important point is that this query is using a construction that was specifically improved in 8.4. The advice is still going to be the same: see if it isn't better with 8.4. regards, tom lane