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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Re: Rule Based Optimizer
what did oracle use before the RBO?
>
> From: Mogens Nørgaard <[EMAIL PROTECTED]>
> Date: 2003/06/11 Wed AM 12:39:20 EDT
> To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
> Subject: Re: Rule Based Optimizer
>
> Yep. Here's the official statement from Oracle about RBO in 10i:
>
> "The RBO is Oracle's legacy optimizer originating from Oracle Version 6
> and earlier. The RBO is being desupported in Oracle10i. The RBO will
> still exist in Oracle10i, but will be an unsupported feature and will be
> removed in a future release. No code changes will be made to the RBO
> code and no bug fixes will be provided. The RBO was superseded in
> Oracle7 by the CBO and has continued to be available for backwards
> compatibility. Oracle Oracle10i will support only one optimizer, and all
> applications running on that release should use that optimizer. "
>
> What's behind this wording? I don't really know, but I can guess.
> There's a myth that the RBO hasn't been enhanced since the introduction
> of CBO in 7.0. That, I learned one day in Steve Adams' car, is not true.
> It has been enhanced to know about new segment types, etc. A fun (well,
> fun...) exception to this is partitions. If you're using partitions
> you're using CBO.
>
> So I read it as: "Yeah, we haven't really enhanced the RBO since 7.0
> except to allow it to recognize IOT's and other new segment types. In
> 10i we won't even do that."
>
> Mogens
>
> Freeman Robert - IL wrote:
>
> >RWB,
> >
> >I'll tell you, if KG says it about Oracle, I pretty much would go to the
> >bank with it.
> >
> >RF
> >
> >-----Original Message-----
> >To: Multiple recipients of list ORACLE-L
> >Sent: 6/10/2003 4:24 PM
> >
> >
> >Mr. Gopalakrishnan:
> >
> >How do you know this? Can anyone confirm (or deny) this? I hope it is
> >true!
> >Oracle should just quit cold turkey and not support the RULE optimizer
> >at
> >all in any future releases.
> >
> >RWB
> >========================================================================
> >====================================
> >
> >Reginald W. Bailey
> >IBM Global Services - ETS SW GDSD - Database Management
> >Your Friendly Neighborhood DBA
> >713-216-7703 (Office) 281-798-5474 (Mobile) 713-415-5410 (Pager)
> >========================================================================
> >====================================
> >
> >
> >
> >
> > [EMAIL PROTECTED]
> >
> > .com To: [EMAIL PROTECTED]
> >
> > Sent by: cc:
> >
> > [EMAIL PROTECTED] Subject: RE: Rule Based
> >Optimizer
> > ity.com
> >
> >
> >
> >
> >
> > 06/10/2003
> >
> > 12:59 PM
> >
> > Please respond
> >
> > to ORACLE-L
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >RULE optimizer will not be supported in next version.
> >But you can still use the RULE optimizer and it is
> >just a matter of official support from Oracle.
> >
> >Best Regards,
> >K Gopalakrishnan
> >
> >
> >
> >
> >-----Original Message-----
> >Goulet, Dick
> >Sent: Tuesday, June 10, 2003 10:16 AM
> >To: Multiple recipients of list ORACLE-L
> >
> >
> >There appears to be a number of folks on the list who have some insight
> >into
> >the next version of the database. I'd like to ask those folks a simple
> >question. What is the future of the Rule Based Optimizer looking like?
> >Does it die in 10i??
> >
> >Dick Goulet
> >Senior Oracle DBA
> >Oracle Certified 8i DBA
> >--
> >Please see the official ORACLE-L FAQ: http://www.orafaq.net
> >--
> >Author: Goulet, Dick
> > INET: [EMAIL PROTECTED]
> >
> >Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> >San Diego, California -- Mailing list and web hosting services
> >---------------------------------------------------------------------
> >To REMOVE yourself from this mailing list, send an E-Mail message
> >to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
> >the message BODY, include a line containing: UNSUB ORACLE-L
> >(or the name of mailing list you want to be removed from). You may
> >also send the HELP command for other information (like subscribing).
> >
> >
> >--
> >Please see the official ORACLE-L FAQ: http://www.orafaq.net
> >--
> >Author: K Gopalakrishnan
> > INET: [EMAIL PROTECTED]
> >
> >Fat City Network Services -- 858-538-5051 http://www.fatcity.com
> >San Diego, California -- Mailing list and web hosting services
> >---------------------------------------------------------------------
> >To REMOVE yourself from this mailing list, send an E-Mail message
> >to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in
> >the message BODY, include a line containing: UNSUB ORACLE-L
> >(or the name of mailing list you want to be removed from). You may
> >also send the HELP command for other information (like subscribing).
> >
> >
> >
> >
> >
>
>
>
Yep. Here's the official statement from Oracle about RBO in 10i:
“The RBO is Oracle's legacy optimizer originating from Oracle Version 6 and earlier. The RBO is being desupported in Oracle10i. The RBO will still exist in Oracle10i, but will be an unsupported feature and will be removed in a future release. No code changes will be made to the RBO code and no bug fixes will be provided. The RBO was superseded in Oracle7 by the CBO and has continued to be available for backwards compatibility. Oracle Oracle10i will support only one optimizer, and all applications running on that release should use that optimizer. “
What's behind this wording? I don't really know, but I can guess. There's a myth that the RBO hasn't been enhanced since the introduction of CBO in 7.0. That, I learned one day in Steve Adams' car, is not true. It has been enhanced to know about new segment types, etc. A fun (well, fun...) exception to this is partitions. If you're using partitions you're using CBO.
So I read it as: "Yeah, we haven't really enhanced the RBO since 7.0 except to allow it to recognize IOT's and other new segment types. In 10i we won't even do that."
Mogens
Freeman Robert - IL wrote:
<blockquote type="cite"
cite="">
RWB,
I'll tell you, if KG says it about Oracle, I pretty much would go to the
bank with it.
RF
-----Original Message-----
To: Multiple recipients of list ORACLE-L
Sent: 6/10/2003 4:24 PM
Mr. Gopalakrishnan:
How do you know this? Can anyone confirm (or deny) this? I hope it is
true!
Oracle should just quit cold turkey and not support the RULE optimizer
at
all in any future releases.
RWB
Reginald W. Bailey
IBM Global Services - ETS SW GDSD - Database Management
Your Friendly Neighborhood DBA
713-216-7703 (Office) 281-798-5474 (Mobile) 713-415-5410 (Pager)
[EMAIL PROTECTED]
.com To: [EMAIL PROTECTED]
Sent by: cc:
[EMAIL PROTECTED] Subject: RE: Rule Based
Optimizer
ity.com
06/10/2003
12:59 PM
Please respond
to ORACLE-L
RULE optimizer will not be supported in next version. But you can still use the RULE optimizer and it is just a matter of official support from Oracle.
Best Regards,
K Gopalakrishnan
-----Original Message-----
Goulet, Dick
Sent: Tuesday, June 10, 2003 10:16 AM
To: Multiple recipients of list ORACLE-L
There appears to be a number of folks on the list who have some insight
into
the next version of the database. I'd like to ask those folks a simple
question. What is the future of the Rule Based Optimizer looking like?
Does it die in 10i??
Dick Goulet
Senior Oracle DBA
Oracle Certified 8i DBA
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Goulet, Dick INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: K Gopalakrishnan INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Wed Jun 11 2003 - 05:57:02 CDT
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