From: Tom Lane <tgl@sss.pgh.pa.us>
To: postgres@leangen.net
Cc: pgsql-performance@postgresql.org
Subject: Re: Improving query performance
Date: Fri, 02 Mar 2007 00:48:08 -0500
Message-ID: <1763.1172814488@sss.pgh.pa.us> (raw)
In-Reply-To: <1172808030.27446.12.camel@sonoda.bioscene.co.jp>
References: <1172808030.27446.12.camel@sonoda.bioscene.co.jp>
David Leangen <postgres@leangen.net> writes:
> And this is the actual query:
> SELECT COUNT(t0.ID) FROM public.MY_TABLE t0
> WHERE ((POSITION('adenosine cyclic 35-monophosphate' IN LOWER(t0.TITLE))
> - 1) >=0 OR
> (POSITION('adenosine cyclic 55-monophosphate' IN LOWER(t0.TEXT)) - 1) >=
> 0 OR
> (POSITION('cyclic amp, disodium salt' IN LOWER(t0.TITLE)) - 1) >= 0 OR
> (POSITION('cyclic amp, disodium salt' IN LOWER(t0.TEXT)) - 1) >= 0 OR
> (POSITION('cyclic amp, sodium salt' IN LOWER(t0.TEXT)) - 1) >= 0 OR
> ...etc...
I think you need to look into full-text indexing (see tsearch2).
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, postgres@leangen.net
Subject: Re: Improving query performance
In-Reply-To: <1763.1172814488@sss.pgh.pa.us>
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