On Wed, Dec 15, 2010 at 08:56, AI Rumman <rumman...@gmail.com> wrote: > My question is why "crmentity_setype_idx" index is being used only. > "crmentity_deleted_idx" index is not using. > Any idea please.
Because the planner determined that the cost of scanning *two* indexes and combining the results is more expensive than scanning one index and filtering the results afterwards. Looks like your query could use a composite index on both columns: (deleted, setype) Or a partial index: (setype) WHERE deleted=0 Regards, Marti -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
