Re: Dead slow count(*)

From: Jan Pruner <JPruner_at_email.cz>
Date: Fri, 30 Jan 2004 02:07:49 +0100
Message-ID: <4019AE65.7050103@email.cz>

I think it will always use fullscan if you use COUNT. But I'm using Oracle 8i or maybe I'm wrong.

JP

Wolfgang Breitling wrote:
> Not always. If Oracle CAN use an index to return the correct value it will.
>
> At 05:09 PM 1/29/2004, you wrote:
>

>>If You use function COUNT, Oracle will always do fullscan!!!
>>So, first question should be - Do I really need to use COUNT?
>>++++++++++++++++++++++++

>
>
> Wolfgang Breitling
> Oracle7, 8, 8i, 9i OCP DBA
> Centrex Consulting Corporation
> http://www.centrexcc.com
>
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Received on Thu Jan 29 2004 - 19:07:49 CST