RE: Indexing SYS tables

Again since the indexes store the row in ordered fashion, I guess a normal index should be able to do ORDER BY DESC by reading backwards

Not sure though

Regards
Naveen

-----Original Message-----
Sent: Tuesday, October 01, 2002 10:33 PM To: Multiple recipients of list ORACLE-L

Yes, you are obviously correct. I really need to RTFM. <sigh> Too many pots on the stove!

Just a regular index, then. Any other input?

Thx!
Rich

Rich Jesse                           System/Database Administrator
Rich.Jesse_at_qtiworld.com              Quad/Tech International, Sussex, WI USA

> -----Original Message-----
> From: Naveen Nahata [mailto:naveen_nahata_at_mindtree.com]
> Sent: Tuesday, October 01, 2002 10:49 AM
> To: Multiple recipients of list ORACLE-L
> Subject: RE: Indexing SYS tables
>
>
> Reverse key index won't help you in ORDER BY DESC, will it?
>
> AFAIK Reverse-key index will store 'Naveen' as 'neevaN' and
> 'Rich' as 'hciR'
> and so won't be helpful in ORDER BY DESC
>
> Regards
> Naveen
>
> -----Original Message-----
> Sent: Tuesday, October 01, 2002 8:58 PM
> To: Multiple recipients of list ORACLE-L
>
>
> Hey,
>
> Anyone have any advice on indexing SYS tables? Specifically,
> I've been
> experimenting with putting a reverse index on the TIMESTAMP#
> column of AUD$,
> since almost all of my queries against the AUD$ views end
> with "ORDER BY
> TIMESTAMP DESC".
>
> In 8.1.7.4.0 test DBs on HP/UX, the index -- created under a
> non-SYS DBA
> schema -- works great. I'm looking for pitfalls, but can't
> come up with any
> of my own...
>
> TIA!
> Rich

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