Re: LIKE on index not working

From: "Chris Cox" <cjcox(at)optushome(dot)com(dot)au>
To: "Peter Eisentraut" <peter_e(at)gmx(dot)net>
Cc: <pgsql-sql(at)postgresql(dot)org>
Subject: Re: LIKE on index not working
Date: 2004-07-22 23:46:27
Message-ID: 002a01c47046$1b31b2c0$5100000a@PHOENIX
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Hi Peter,

Thanks for the tip. The locale we're using is en_US.UTF-8. From my limited
knowledge of locales, that's a non-C one isn't it?

Am I right in saying that to fix it I need to initdb again with a C locale?
How do I go about doing that on an environment with some 132 databases?

What a pain!

Chris

----- Original Message -----
From: "Peter Eisentraut" <peter_e(at)gmx(dot)net>
To: "Chris Cox" <cjcox(at)optushome(dot)com(dot)au>
Cc: <pgsql-sql(at)postgresql(dot)org>
Sent: Thursday, July 22, 2004 10:41 PM
Subject: Re: [SQL] LIKE on index not working

> Am Donnerstag, 22. Juli 2004 09:38 schrieb Chris Cox:
> > For some reason I just can't get this to use the index for the following
> > query. I'm using PostgreSQL 7.3.4.
>
> In 7.3, LIKE cannot use an index unless you set the locale to C. In 7.4,
LIKE
> can use an index, but it has to be a different kind of index, as explained
> here:
>
> http://www.postgresql.org/docs/7.4/static/indexes-opclass.html
>
> --
> Peter Eisentraut
> http://developer.postgresql.org/~petere/
>

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