On Tue, 17 Jan 2006 J@xxxxxxxxxxx wrote: > I created the index like this: > > CREATE INDEX rcbee_idx > ON detail_summary > USING btree > (receipt, carrier_id, batchnum, encounternum, encounter_id); > > Is this correct ? That would work if you were asking for all the columns ascending or descending, but we don't currently use it for mixed orders. > How do I make a reverse opclass ? There's some information at the following: http://archives.postgresql.org/pgsql-novice/2005-10/msg00254.php http://archives.postgresql.org/pgsql-general/2005-01/msg00121.php http://archives.postgresql.org/pgsql-general/2004-06/msg00565.php