Robert Haas wrote: > Tom Lane wrote: >> I don't think that suppressing nulls from an index this way is >> really very useful. Using a partial index probably eats more >> planner cycles than you'll save, overall. > > If only 1% of the table has non-NULL values in that column, maybe > not. We definitely have indexes with less than 1% non-NULL, and we've found partial indexes to be efficient for them. On the other hand, I can't think where we do min/max on any of them; so as long as this regression only affects those aggregates, it won't hurt our shop. The use case doesn't seem all that far-fetched to me, though. -Kevin
-- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
