chris_at_databaseguy.com (Chris Leonard) wrote in message news:<b8cc3cda.0206171427.56230eb6_at_posting.google.com>...
> I assume you mean "choose" and not "rule" ... ??? Just a sanity check.
> Also, do you have the necessary statistics generated?
>
> HTH,
> Chris
> ______________________________
> Chris Leonard
> MCSE, MCDBA, MCT, OCP, CIW
> The Database Guy at PPI
> http://www.propoint.com
> Brainbench MVP for Oracle Admin
> http://www.brainbench.com
>
>
> alhepworth_at_hotmail.com (Alan) wrote in message news:<9920a15d.0206170208.4e0f8c07_at_posting.google.com>...
> > Hi
> > I'm investigating some performance problems within our system and am
> > looking at the explain plans for some sql. On one box (v8.1.7) when I
> > run the following:
> >
> > alter session set optimizer_mode = rule
> > select blah from blah where blah
> >
> > I can see that plan and no costs are present.
> >
> > When I run it on our v8.0.5 box, I can see costs in the plan. Does
> > this mean that the optimizer_mode is not set to rule for some reason?
> >
> > Thanks in advance
> > Alan
I have _no_ statistics generated on either box at the moment. My query
is why the 8.0.5 explain plans are showing costs when I would expect
the rule based optimiser to be used.
Alan
Received on Wed Jun 19 2002 - 04:43:04 CDT
