Re: which should be faster

"the predicate order can make a difference" - does oracle (of course if it does not have a better clue) analyze predicates in a certan order: bottom-up, or top-down, similar as for the FROM clause ? you said "under oracle 8" - including 8i ?

Thanks.

Djordje

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Saturday, May 03, 2003 11:11 AM

>
> Did you also test with index compression in place
> on the organization column ?
>
> If your tests were:
> organization = 'XXX'
> and inv_date between ....
>
> did you also test
> inv_date between ....
> and organization = 'XXX'
>
> Under Oracle 8, the predicate order
> can make a difference - although in
> this case I don't think you would see
> much difference, as neither predicate
> is an eliminator at the filter level.
>
>
> Regards
>
> Jonathan Lewis
> http://www.jlcomp.demon.co.uk
>
> The educated person is not the person
> who can answer the questions, but the
> person who can question the answers -- T. Schick Jr
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> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> Sent: 02 May 2003 22:31
>
>
> > Actually I found a note on tom kyte's book(expert one on one) that
> it
> > shouldn't matter weather u index c1,c2 or c2,c1 . Although my
> scenerio is
> > not exact . But its kinda similer . I did a little testing and found
> that
> > just invdate is faster compare to org , indate .
> >
> > Thanks ,
> > -ak
> >
>
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Djordje Jankovic
  INET: djordjej_at_rogers.com

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