On Tue, 2008-08-26 at 00:58 -0400, Tom Lane wrote: > Ow Mun Heng <Ow.Mun.Heng@xxxxxxx> writes: > > On Mon, 2008-08-25 at 10:18 -0400, Tom Lane wrote: > >> I suppose code_id is varchar or some such? > > > Yep > > After a few more investigation on the usefulness of the partial indexes, > > I found that, it really isn't all that useful, perhaps some experts can > > shed some light. > > I poked at that example a bit more earlier today, and found that 8.3 > has a problem that's interfering with optimizing x IN ('y','z') type > clauses when x is varchar. If you don't mind building a local copy, > see if this patch helps you any: > http://archives.postgresql.org/pgsql-committers/2008-08/msg00254.php I wouldn't mind if I have a box with a compiler installed or if i have a NON-Production Box at all. :-(