Use the text_pattern_ops operator when creating the index, see:
http://www.postgresql.org/docs/7.4/static/indexes-opclass.html
Michael Ryan S. Puncia wrote:
> Sorry .. I am a newbie and I don't know :(
> How can I know that I am in C locale ?
> How can I change my database to use C locale?
>
>
>
> -----Original Message-----
> From: pgsql-performance-owner@postgresql.org
> [mailto:pgsql-performance-owner@postgresql.org] On Behalf Of Christopher
> Kings-Lynne
> Sent: Wednesday, May 12, 2004 3:59 PM
> To: Michael Ryan S. Puncia
> Cc: pgsql-performance@postgresql.org
> Subject: Re: [PERFORM] Using LIKE expression problem..
>
> Are you in a non-C locale?
>
> Chris
>
> Michael Ryan S. Puncia wrote:
>
>
>>Yes , I already do that but the same result .. LIKE uses seq scan
>>
>>-----Original Message-----
>>From: pgsql-performance-owner@postgresql.org
>>[mailto:pgsql-performance-owner@postgresql.org] On Behalf Of Christopher
>>Kings-Lynne
>>Sent: Wednesday, May 12, 2004 2:48 PM
>>To: Michael Ryan S. Puncia
>>Cc: pgsql-performance@postgresql.org
>>Subject: Re: [PERFORM] Using LIKE expression problem..
>>
>>
>>
>>>In the query plan ..it uses seq scan rather than index scan .. why ? I
>>>have index on lastname, firtname.
>>
>>
>>Have you run VACUUM ANALYZE; on the table recently?
>>
>>Chris
>>
>>
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