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

Home -> Community -> Usenet -> c.d.o.server -> Re: Don't rely on 9i Skip Scan Indexing

Re: Don't rely on 9i Skip Scan Indexing

From: Niall Litchfield <n-litchfield_at_audit-commission.gov.uk>
Date: Mon, 21 Oct 2002 16:39:09 +0100
Message-ID: <3db41f9e$0$8506$ed9e5944@reading.news.pipex.net>


"Jonathan Lewis" <jonathan_at_jlcomp.demon.co.uk> wrote in message news:ap0amv$4cp$1$8300dec7_at_news.demon.co.uk...
> Rule one when 'feature does not work' is
> to hint it in to find out what the cost of
> making it work is going to be.
>
> Try /*+ index_ss_asc */ with the query
> and you may find that a skip scan on
> your data set has a cost which is higher
> than the FTS..

Incidentally I did try this hint, but presumably got the syntax wrong, so I went to the 9i docs at tahiti. Unfortunately this hint doesn't seem to appear where I'd expect it (in the access paths hints section for performance tuning.), or in a search. Did you find it elsewhere or is it time for a documentation bug.

--
Niall Litchfield
Oracle DBA
Audit Commission UK
*****************************************
Please include version and platform
and SQL where applicable
It makes life easier and increases the
likelihood of a good answer

******************************************
Received on Mon Oct 21 2002 - 10:39:09 CDT

Original text of this message

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