Oracle FAQ Your Portal to the Oracle Knowledge Grid

Home -> Community -> Mailing Lists -> Oracle-L -> RE: Re[2]: Re[2]:Upgrading Oracle

RE: Re[2]: Re[2]:Upgrading Oracle

From: Adams, Matthew (GEA, 088130) <MATT.ADAMS_at_APPL.GE.COM>
Date: Wed, 25 Oct 2000 10:19:21 -0400
Message-Id: <>


  Why can't you create indexes on these columns? (offhand they sound like candidates for bitmapped indexes)


R. Matt Adams - GE Appliances -

      No electrons were harmed in the making of this e-mail.

> -----Original Message-----
> From: Rachel Carmichael []
> Sent: Wednesday, October 25, 2000 12:06 AM
> To: Multiple recipients of list ORACLE-L
> Subject: Re: Re[2]: Re[2]:Upgrading Oracle
> oh that was minor compared to today's rant... a third party
> product that
> denormalizes tables because their "experts" told them that if
> you have more
> than 4 tables in a join performance suffers significantly.
> So instead of a parent table with a child table that contains
> one row for
> each option selected, I have ONE table with a column for
> every possible
> option, and a Y/N switch for each one. AND just to make it even more
> interesting, if you want to add a new option, the product
> automatically adds
> a new column to the table. We expect to have something like
> 5-15 million
> rows in that table. And we will do selections for mass emails
> based on each
> of those columns. Which I can't index, so we will do multiple
> full table
> scans on a table way too large to pin into the buffer pool.
> I managed not to foam at the mouth. And made sure that
> EVERYONE in that
> meeting knew that I thought that this design was going to
> cause us major
> performance problems that I could not necessarily do DBA
> magic to remove.
> Sigh......
> Rachel
> >From:
> >To: "Rachel Carmichael" <>,
> Multiple recipients
> >of list ORACLE-L <>
> >Subject: Re[2]: Re[2]:Upgrading Oracle
> >Date: Tue, 24 Oct 2000 18:35:20 -0400
> >
> >Nice to see I can still get a rise out of you. Cheers!!
> >
> >Dick Goulet
> ______________________________________________________________
> ___________
> Get Your Private, Free E-mail from MSN Hotmail at

Share information about yourself, create your own public profile at

Please see the official ORACLE-L FAQ:
Author: Rachel Carmichael

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
To REMOVE yourself from this mailing list, send an E-Mail message
to: (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
Received on Wed Oct 25 2000 - 09:19:21 CDT

Original text of this message