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RE: Should we stop analyzing?

From: Jared Still <jkstill_at_cybcon.com>
Date: Thu, 08 Jan 2004 10:39:30 -0800
Message-ID: <F001.005DC2A0.20040108103930@fatcity.com>


> Me thinks CBO is probably never going to be bug free.
> What works for you, won't work for me unless we run
> identical systems, it is a general purpose system,
> CBO doesn't know your system or data usage.

At this point it would seem beneficial to differentiate between a bug and a logic error.

Roughly, a bug would seem to be code that falls into one of two categories:

A logic error would be found in code that does exactly what the developer intended, but what the developer intended is the wrong thing to do.

This could be expanded to include the inability of CBO to properly identify a usage pattern.

just my opinion.

Jared

On Thu, 2004-01-08 at 08:49, Jamadagni, Rajendra wrote:
> Me thinks CBO is probably never going to be bug free. What works for you, won't work for me unless we run identical systems, it is a general purpose system, CBO doesn't know your system or data usage. Still it tries to make a better judgment ..
>
> Hey it is a whale lot better than those RDBMS where there are no hints to use in case optimizer goes crazy.
>
> Raj
> --------------------------------------------------------------------------------
> Rajendra dot Jamadagni at nospamespn dot com
> All Views expressed in this email are strictly personal.
> QOTD: Any clod can have facts, having an opinion is an art !
>
>
> -----Original Message-----
> Sent: Thursday, January 08, 2004 11:29 AM
> To: Multiple recipients of list ORACLE-L
>
>
> > 2- the CBO like any other piece of code, is sometimes buggy?
>
> Always, not sometimes....
>
> Tanel.
>
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> Author: Jamadagni, Rajendra
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Jared Still
  INET: jkstill_at_cybcon.com

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Received on Thu Jan 08 2004 - 12:39:30 CST

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