Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Mailing Lists -> Oracle-L -> Re: full-scan vs index for "small" tables

Re: full-scan vs index for "small" tables

From: Connor McDonald <mcdonald.connor_at_gmail.com>
Date: Fri, 30 Jun 2006 21:33:18 +0800
Message-ID: <5e3048620606300633l36717221ua4d0528b837409a@mail.gmail.com>


Sheesh, people are really keen on bagging the CBO...Hell, we all know its trivial to produce scenarios where the CBO will get it wrong (inter-column dependencies always being a common one)..

But a little humility please...I've also had many times where I've seen a plan and thought..."Nah, CBO has got it wrong"...so I hint it in the way that I think will be best, and guess what, my option sucks and the CBO's choice was better...Man, we all stay quiet on that one don't we...

:-)

-- 
Connor McDonald
===========================
email: connor_mcdonald_at_yahoo.com
web:   http://www.oracledba.co.uk

"Semper in excremento, sole profundum qui variat"
--
http://www.freelists.org/webpage/oracle-l
Received on Fri Jun 30 2006 - 08:33:18 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US