On 09/27/2012 03:55 PM, Scott Marlowe wrote:
Have you tried re-writing this query first? Is there a reason to have a bunch of subselects instead of joining the tables? What pg version are you running btw? A newer version of pg might help too.
Wow, yeah. I was just about to say something about that. I even pasted it into a notepad and started cutting it apart, but I wasn't sure about enough of the column sources in all those subqueries.
It looks like it'd be a very, very good candidate for a window function or two, and maybe a few CASE statements. But I'm about 80% certain it's not very efficient as is.
-- Shaun Thomas OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604 312-444-8534 sthomas@xxxxxxxxxxxxxxxx ______________________________________________ See http://www.peak6.com/email_disclaimer/ for terms and conditions related to this email -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
