On Thu, Jan 27, 2011 at 1:31 PM, Mladen Gogala <mladen.gogala@xxxxxxxxxxx> wrote: > There is INDEX UNIQUE SCAN PK_EMP. Oracle will use an index. That's because Oracle has covering indexes. -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance