Josh Berkus <josh@xxxxxxxxxxxx> writes: > So ... should I assume my diagnosis is correct? Haven't heard any other > suggestions. I don't see any reason to think this is worth worrying about, or worth spending planner cycles on to produce a cosmetically nicer cost estimate. One-time filters always apply at the top plan level so they're unlikely to change any planner choices. Moreover, for any case other than the not-terribly-interesting constant FALSE case, we're better off assuming that the filter condition will be true (and so there's nothing to adjust). regards, tom lane -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance