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Re: is it possible to get the optimizer to use indexes

From: Dave Cramer <pg(at)fastcrypt(dot)com>
To: Doug McNaught <doug(at)mcnaught(dot)org>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: is it possible to get the optimizer to use indexes
Date: 2003-12-24 13:58:34
Message-ID: 1072274314.1687.12.camel@localhost.localdomain (view raw, whole thread or download thread mbox)
Lists: pgsql-performance

Yes, it does depend on the locale, you can get around this in 7.4 by
building the index with smart operators

On Thu, 2003-12-18 at 20:38, Doug McNaught wrote:
> Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au> writes:
> >> It appears that the optimizer only uses indexes for = clause?
> >
> > The optimizer will used indexes for LIKE clauses, so long as the
> > clause is a prefix search, eg:
> >
> > SELECT * FROM test WHERE a LIKE 'prf%';
> Doesn't this still depend on your locale?
> -Doug
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