Marcus Engene <mengpg2@xxxxxxxxx> writes: > ... In a case with some 5000 rows belonging to owner 123, this select really > takes a long time. Way longer than without the subselect and order by > filelength. I agree that with the subselect it would take some extra > juice, but in my mind it would do some hash in memory which wouldn't be > too slow to lookup in. 8.4 can turn EXISTS subqueries into hash joins, but previous releases won't... regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
