Cherie,
My first response is 'WHY?'. Do they mean that they want to create 2
new sequences and use the DUAL table to retrieve the values? It will cause
performance problems and there are better solutions. I have some information
on the performance implications of DUAL at
http://www.optimaldba.com/internals/oraint_dual.html.
Dan Fink
-----Original Message-----
Sent: Tuesday, July 30, 2002 11:54 AM
To: Multiple recipients of list ORACLE-L
I have a request from one of our developers to create two new sequences on
the DUAL table.
This seems like a bad idea to me. I've never had such a request in the
past. I asked for clarification on why this is needed and I didn't get a
lot of details yet.
Is this something that is standard operating procedure? My understanding
that interfacing with the DUAL table is usually inviting poor performance.
Plus, I don't like to mess around with system tables, in general.
Under what circumstances would it be justified to create sequences on the
DUAL table? Should I just flat-out refuse this request and if so, why?
Thanks,
Cherie Machler
Oracle DBA
Gelco Information Network
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