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Re: Very slow search using basic pattern matching

From: Karsten Hilbert <Karsten(dot)Hilbert(at)gmx(dot)net>
To: pgsql-sql(at)postgresql(dot)org
Subject: Re: Very slow search using basic pattern matching
Date: 2004-05-18 17:15:04
Message-ID: 20040518191504.C607@hermes.hilbert.loc (view raw, whole thread or download thread mbox)
Lists: pgsql-sql
> 	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.

GPG key ID E4071346 @
E167 67FD A291 2BEA 73BD  4537 78B9 A9F9 E407 1346

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