2009/4/16 Matthew Wakeling <matt...@flymine.org>: > On Thu, 16 Apr 2009, Grzegorz Jaśkiewicz wrote: >> >> On Thu, Apr 16, 2009 at 11:37 AM, Matthew Wakeling <matt...@flymine.org> >> wrote: >>> >>> I have a query that is executed really badly by Postgres. It is a nine >>> table >>> join, where two of the tables are represented in a view. If I remove one >>> of >>> the tables from the query, then the query runs very quickly using a >>> completely different plan. >> >> And what happens if you execute that view alone, with WHERE .. just >> like it would be a part of the whole query? ((id = 1267676)) > > Really quick, just like the query that works in my email.
What happens if you change join_collapse_limit and from_collapse_limit to some huge number? http://www.postgresql.org/docs/current/static/runtime-config-query.html#GUC-FROM-COLLAPSE-LIMIT ...Robert -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
