Re: Analyze with rule based optimizer

From: Rod Corderey <RodCorderey_at_Lane-Associates.com>
Date: Fri, 07 Jul 2000 09:06:36 +0100
Message-Id: <10551.111409@fatcity.com>

Another point to bear in mind is that if your optimizer_mode is set to CHOOSE, COST based will be used even if only one table referred to in the query has been analysed.

This can lead to full table scans on the remaining un-analysed tables in the query from list.

Rod

-- 
Rod Corderey

Lane Associates
RodCorderey_at_Lane-Associates.com
http://www.Lane-Associates.com

djordjej wrote:


> 

> 

> If it is set to RULE it will not use the statistics.  If it CHOOSE it will

> consider statistics.

> 

> Djordje

> 

> -----Original Message-----

> To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>

> Date: Thursday, July 06, 2000 6:43 PM

> 

> >

> >If tables were analyzed on an 8.0.5 database that was set to

> >RULE, will it effect anything or will it just ignore that they

> >were analyzed and continue to use RULE anyway?

> >

> >-----

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> --

> Author: djordjej

>   INET: djordjej_at_attcanada.ca

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Received on Fri Jul 07 2000 - 03:06:36 CDT