Thanks a lot Kretschmer. i will try it .
Regards,
Ram
----- Original Message -----
From: "A. Kretschmer" <andreas.kretschmer@schollglas.com>
To: <pgsql-performance@postgresql.org>
Sent: Tuesday, November 24, 2009 11:45 AM
Subject: Re: [PERFORM] Query is slow when executing in procedure
> In response to ramasubramanian :
>> Dear all,
>> The query is slow when executing in the stored procedure(it is taking
>> around 1 minute). when executing as a sql it is taking 4 seconds.
>> basically i am selecting the varchar column which contain 4000 character.
>> We
>> have as iindex on the table. We have analyzed the table also. What could
>> be the
>> reason. How to improve it?
>
> The reason is hard to guess, because you don't provide enough
> informations like the function code.
>
> My guess:
>
> You calls the function with a parameter, and the planner isn't able to
> chose a fast plan because he doesn't know the parameter. That's why he
> is choosen a seq-scan. You can rewrite your function to using dynamical
> execute a string that contains your sql to force the planner search an
> optimal plan for your actual parameter.
>
> But yes, that's only a wild guess (and sorry about my english...)
>
> Please, show us the table and the function-code.
>
>
> Regards, Andreas
> --
> Andreas Kretschmer
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