From: A. Kretschmer <andreas.kretschmer@schollglas.com>
To: pgsql-sql@postgresql.org
Subject: Re: Index to support LIKE '%suffix' queries
Date: Wed, 1 Mar 2006 12:33:01 +0100
Message-ID: <20060301113301.GD9939@webserv.wug-glas.de> (raw)
In-Reply-To: <874q2ik4xf.fsf@mid.deneb.enyo.de>
References: <87mzgfh69m.fsf@mid.deneb.enyo.de>
<11673.1140888147@sss.pgh.pa.us>
<877j7jfhqs.fsf@mid.deneb.enyo.de>
<20060225181346.GA6092@surnet.cl>
<874q2ik4xf.fsf@mid.deneb.enyo.de>
am 01.03.2006, um 8:19:40 +0100 mailte Florian Weimer folgendes:
> * Alvaro Herrera:
>
> >> > Florian Weimer <fw@deneb.enyo.de> writes:
> >> >> Is it possible to create an index to support queries of the form
> >> >> "column LIKE '%suffix'" (similar to an ordinary index for LIKE
> >> >> 'prefix%', which I also need)?
> >
> > It is possible to create a functional index on the reverse of the
> > string.
>
> Okay. Is there a predefined reverse function? I couldn't find one
> and I'm wondering if I just missed it.
simple to write one, http://a-kretschmer.de/diverses.shtml
HTH, Andreas
--
Andreas Kretschmer (Kontakt: siehe Header)
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To: pgsql-sql@postgresql.org
Cc: andreas.kretschmer@schollglas.com
Subject: Re: Index to support LIKE '%suffix' queries
In-Reply-To: <20060301113301.GD9939@webserv.wug-glas.de>
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