Re: which should be faster

Is the predicate order relavent for 8.1.7.3? Im doing quite a bit of tuning and am wondering whether its worth the effort to reorganize the predicate?

So is the rule of thumb on predicates.

 Filters before joins..

If I have col1 = 'ABC', put that before my join?

BTW, logically I would think it would help to put filters into inline views, but Im not seeing any performance improvements. You have any luck with this?

select col1, b.col2
from a,
(select col2
from tabb
where col2 = 'blah') b
where a.col1 = b.col1

Someone told me this can help. Any good rules of thumb on this or documents? All the books seem to only focus on the basic things. ----- 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
> >
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Jonathan Lewis
> INET: jonathan_at_jlcomp.demon.co.uk
>
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