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From: Karsten Hilbert <Karsten.Hilbert@gmx.net>
To: pgsql-sql@postgresql.org
Subject: Re: Very slow search using basic pattern matching
Date: Tue, 18 May 2004 19:15:04 +0200
Message-ID: <20040518191504.C607@hermes.hilbert.loc> (raw)
In-Reply-To: <A02B0582-A8E2-11D8-9565-000A958E367A@llgc.org.uk>
References: <A02B0582-A8E2-11D8-9565-000A958E367A@llgc.org.uk>

> WHERE  
> 	da_records.DESCRIPTION_CY ~* '.*Aberystwyth*.' 
>  OR  
> 	da_records.TITLE_CY ~* '.*Aberystwyth*.'  
> limit 100 
> 
> Is there a better way of matching the string? (Must be case 
> insensitive) 
Are you sure you can't anchor the search pattern ?

eg  ~* '^' || lower('Aberystwyth') || '.*'

That'd allow for use of (functional) indices.

Karsten
-- 
GPG key ID E4071346 @ wwwkeys.pgp.net
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