RE: CBO question ?

From: Igor Neyman <ineyman_at_perceptron.com>
Date: Thu, 2 Mar 2006 11:47:25 -0500
Message-ID: <F4C27E77F7A33E4CA98C19A9DC6722A2BB9C81@EXCHANGE.corp.perceptron.com>

You are wrong.

Igor

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Andem, Venu
Sent: Thursday, March 02, 2006 11:41 AM
To: oracle-l_at_freelists.org
Subject: RE: CBO question ?

Paul,

I think its the other way round, if one of the tables in the query does not contain statistics then Oracle uses RBO. pls correct me if i am wrong.

Venu

	-----Original Message-----
	From: oracle-l-bounce_at_freelists.org


[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Baumgartel, Paul

	Sent: 02 March 2006 15:31
	To: oracle-l_at_freelists.org
	Subject: RE: CBO question ?
	
	
	If any table mentioned in the query has statistics stored in the

data dictionary, Oracle will use the CBO.

	Paul Baumgartel 
	paul.baumgartel_at_credit-suisse.com 
	212.538.1143 

		-----Original Message-----
		From: oracle-l-bounce_at_freelists.org


[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Savio Pinto (s)

		Sent: Thursday, March 02, 2006 10:28 AM
		To: oracle-l_at_freelists.org
		Subject: CBO question ?
		
		

		Hi, 

		The execution plan for a query in oracle 9i shows

"Optimizer= CHOOSE", how can i force the DB engine to use the COST based optimization for a query ?

Oracle version is 9.2.0.4.0

		Thanks 
		Savio Pinto 


	
	
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Received on Thu Mar 02 2006 - 10:47:25 CST