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Re: Index to support LIKE '%suffix' queries - Mailing list pgsql-sql

From A. Kretschmer
Subject Re: Index to support LIKE '%suffix' queries
Date
Msg-id 20060301113301.GD9939@webserv.wug-glas.de
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In response to Re: Index to support LIKE '%suffix' queries  (Florian Weimer <fw@deneb.enyo.de>)
List pgsql-sql
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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
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