Re: external query VS user function

Hello

2008/9/11 Joao Ferreira gmail <joao.miguel.c.ferreira@gmail.com>:
> Hello all,
>
> I'm trying to optimize the execution of a query which deletes a big
> amount of records based on time
>
> I need to remove from 100.000 to 1.000.000 records from my table once a
> day, and I'dd like to make that removal as fast as possible. This is the
> idea:
>
> DELETE FROM tt WHERE time < $1;
>
>
> Would it be considerably faster if I declare that query inside a user
> function, let's say function_delete(integer), and invoque it instead
>
> SELECT function_delete($max_time);
>
>

using function hasn't any positive effect there. Evaluation is same,

regards
Pavel Stehule

> Would this second approach be faster ? I imagine there could be some
> internal mechanism that would allow pg to have that query pre-optimized
> somehow ?
>
> thanks for the feedback.
>
> Joao
>
> [[[ I've been looking at Partitioning, but it seems to be a quite
> intrusive setup if you already have your system up and running]]]
>
>
>
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