You raise an interesting idea in my mind...
How useful would it be for us if Oracle created an INFINITE_DUAL table -
One where you could select as many rows as you wished. I guess it might be
dangerous but it would at least be very efficient if Oracle coded it as a
special table. Then you could just do things like "select rownum from
infinite_dual where rownum <= 1000000" without concern or consideration.
As you said - you wouldn't use it every day, but I'm sure it would be handy
to have. It would also provide new ways to crash Oracle I guess, with
queries like "select rownum the_row from infinite_dual order by the_row".
Hmm, perhaps this idea needs some additional thought? I'm sure it would be
practical to create something which works efficiently and safely though.
Regards,
Mark.
"Stephane
Faroult" To: Multiple recipients of list
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ORACLE-L
>----- ------- Original Message ------- -----
>From: "Mark Richard" <[EMAIL PROTECTED]>
>To: Multiple recipients of list ORACLE-L
><[EMAIL PROTECTED]>
>Sent: Tue, 16 Sep 2003 19:59:41
>
>
>I guess I should have added some criteria like:
>
>1) user_objects must have enough rows in it to
>cover the range (if not
>consider some other table)
>
This one is a very interesting consideration. The use of 'pivot' tables, as
in this case, without being something you meet daily is fairly frequent
(completing series like here is one usage, otherwise I commonly use them to
generate test data). It should be some standard feature, a kind of
'extended dual' (XDUAL ?).
Perhaps this (to be run as SYS) should be added as a standard part of the
catalogue :
create view xdual
as select rownum from sys.col$;
grant select on xdual to public;
create public synonym xdual for xdual;
sys.col$ always contains a 'respectable' number of rows (10,000+, even
without SAP :-)). Although indeed a standard sys.source$ is twice bigger
just after install ..
Regards,
Stephane Faroult
Oriole
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