Re: Dead slow count(*)
- From: Jan Pruner <JPruner@xxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Fri, 30 Jan 2004 02:07:42 +0100
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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