I am combining query results that I know are disjoint. I'm wondering how much overhead there is in calling union versus union all. (Just curious really; I can't see a reason not to use union all.) (cc me please; not subscribed...)
THK -- Timothy H. Keitt http://www.keittlab.org/ -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
