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Re: Plea for Query Tuning Help

From: Ghassan Salem <salem.ghassan_at_gmail.com>
Date: Wed, 13 Sep 2006 09:45:09 +0200
Message-ID: <411d50f60609130045l4184cc9eh78f77daef4403938@mail.gmail.com>


Norman,
if you use the "view" several times in the query, CBO can decide to materialize it, without the hint.

rgds

On 9/13/06, Norman Dunbar <norman.dunbar_at_environment-agency.gov.uk> wrote:
>
>
> Morning all,
>
> >> It is more than cosmetic as it can be referenced multiple times and
> the
> >> query is only run once and materialized, then processed as a table
> in the
> >> main query
>
> Correct me if I'm wrong, but I'm sure it is only materiali[sz]ed if you
> use the materialize hint ? Jonathan has a post somewhere on this list on
> this very subject (I think !).
>
>
> Cheers,
> Norman.
>
> Norman Dunbar.
> Contract Oracle DBA.
> Rivers House, Leeds.
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Received on Wed Sep 13 2006 - 02:45:09 CDT

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