Understood. Thank you! ________________________________________ From: Tom Lane [tgl@xxxxxxxxxxxxx] Sent: Tuesday, December 11, 2012 9:10 AM To: Alex Burkoff Cc: pgsql-general@xxxxxxxxxxxxxx Subject: Re: execution plan is wrong, or the query ? Alex Burkoff <alex.burkoff@xxxxxxxxxxxxxxxx> writes: > I think I am just looking for an opinion on fundamentals. Can WHERE clause impact an OUTER JOIN ? Sure. I noticed for instance that your query had some outer joins that were simplified to plain joins as a result of strict WHERE clauses above them. That's not incorrect. > What I am seeing is that on 9.2 rows from the joined table are restricted prior to joining them with the rest > of the tables, and that leads to incorrect results. I have noticed such behaviour only when CASE is used > in the WHERE clause - straight text comparison does produce correct results. Oh? Hm, I wonder whether you are needing this fix: http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=72a4231f0c80f213a4fa75356dc3c6b7c7419059 Although that bug exists in some form back to 7.4, 9.2 had a more obvious form of the disease, which is what led to its diagnosis. If you're not running 9.2.2, give that a try and see if it's better. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
