Re: LIKE search and performance

Thank you all for the answers.
I will try your suggestions and see what that brings in terms of
performance.

Andy.

> -----Original Message-----
> From: pgsql-performance-owner@postgresql.org
> [mailto:pgsql-performance-owner@postgresql.org] On Behalf Of
> Rigmor Ukuhe
> Sent: Wednesday, May 23, 2007 6:52 PM
> Cc: pgsql-performance@postgresql.org
> Subject: Re: [PERFORM] LIKE search and performance
>
> Andy wrote:
> > Hi,
> >
> > I have a table with varchar and text columns, and I have to search
> > through these text in the whole table.
> >
> > An example would be:
> > SELECT * FROM table
> >                              WHERE name like '%john%' or
> street like '%srt%'
> >
> > Anyway, the query planner always does seq scan on the whole
> table and
> > that takes some time. How can this be optimized or made in
> another way
> > to be faster?
>
> Use tsearch2
> (http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/) for
> full text indexing.
>
> Rigmor
>
> >
> > I tried to make indexes on the columns but no success.
> >
> > PG 8.2
> >
> > Regards,
> > Andy.
>
>
>
>
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