On Fri, Jul 02, 2004 at 09:48:48 +0200,
  Peter Alberer <[EMAIL PROTECTED]> wrote:
> Postgres seems to execute the function "submission_status" for every row
> of
> the submissions table (~1500 rows). The query therefore takes quite a
> lot
> time, although in fact no row is returned from the assignments table
> when
> the condition package_id=949589 is used.

If submission_status is invertable you might want to create the
inverse function, mark it immutable and call it with 'closed'.
That would allow the optimizer to compare submissions.submission_id
to a constant.

Another option would be be to create an index on

---------------------------(end of broadcast)---------------------------
TIP 5: Have you checked our extensive FAQ?


Reply via email to