I'm not an expert, but AFAIK locale and collation heavily affects LIKE, and
thus, IIRC there is no index search for like, maybe except the simplest
locales (maybe C and/or en_US?)
But if you mean it... there is a nasty trick in the archives:
http://archives.postgresql.org/pgsql-general/2002-08/msg00819.php
Really, really nasty, but really nice at the same time.
G.
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while (!asleep()) sheep++;
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----- Original Message -----
From: "Diehl, Jeffrey" <jdiehl@sandia.gov>
To: <pgsql-sql@postgresql.org>; <pgsql-performance@postgresql.org>
Sent: Wednesday, April 30, 2003 6:34 PM
Subject: [PERFORM] Like search performance.
> Hi all,
>
> I have a fairly large table with a char(20) field in it which I search on
> quite a bit. The problem is that I tend to do a lot of
> "...where field like '%-d%'" type searches on this field.
>
> Is there any to speed up this type of search?
>
> TIA,
>
> Mike Diehl.
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>
