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Home -> Community -> Mailing Lists -> Oracle-L -> FW: SQL help needed
How incredibly frustrating! My original response keeps getting truncated
just before the good stuff! Here is one more try with HTML turned off...
Sorry for the last response in this thread which was truncated. Very annoying! The full response looks as follows (hope this goes through in it¹s entirety)...
Great idea, Mark!
By the way, does anyone remember the "yes" command in UNIX? Same concept. I think it was invented to answer ³yes² to any program which mindlessly prompt for ³yes/no² responses in situations where only ³yes² makes sense. Case in point: ³fsck². As in: ³Do you want to repair this block (y/n)? ³. Later on, the ³fsck y² option made the separate ³yes² command unnecessary. Nice thing about the ³yes² command is that it could also answer ³no² endlessly (i.e. ³yes n²) or other themed responses (i.e. ³yes eat me²)...
Anyway, here's your INFINITE_DUAL table, obviously requiring Oracle9i or above...
> SQL> create type InfiniteDualType as object (dummy number);
> 2 /
>
> Type created.
>
> SQL>
> SQL> create type InfiniteDualTable as table of InfiniteDualType;
> 2 /
>
> Type created.
>
> SQL>
> SQL> create function f_infinite_dual(upper_limit in number default null)
> 2 return InfiniteDualTable
> 3 pipelined
> 4 is
> 5 v_rtn InfiniteDualType;
> 6 i integer := 1;
> 7 begin
> 8 --
> 9 v_rtn := InfiniteDualType(null);
> 10 while true loop
> 11 v_rtn.dummy := i;
> 12 if upper_limit is not null and i > upper_limit then
> 13 exit;
> 14 end if;
> 15 i := i + 1;
> 16 pipe row (v_rtn);
> 17 end loop;
> 18 --
> 19 return;
> 20 --
> 21 end f_infinite_dual;
> 22 /
>
> Function created.
>
> SQL>
> SQL> select * from table(f_infinite_dual(10));
>
> DUMMY
> ----------
> 1
> 2
> 3
> 4
> 5
> 6
> 7
> 8
> 9
> 10
>
> 10 rows selected.
>
> SQL>
> SQL> create view infinite_dual
> 2 as
> 3 select * from table(f_infinite_dual);
>
> View created.
>
> SQL>
> SQL> select * from infinite_dual;
>
> DUMMY
> ----------
> 1
> 2
> 3
> 4
> 5
> 6
> 7
> 8
> 9
> 10
> 11
>
> DUMMY
> ----------
> 12
> 13
> 14
> 15
> 16
> 17
> 18
> 19
> 20
> 21
> 22
>
> DUMMY
> ----------
> 23
> 24
> 25
> 26
> 27
> 28
> 29
> 30
> 31
> 32
> 33
..and so on, and so on, and so on, until you hit CTRL-C (or 42, which ever represents infinity in your own belief system)...
Just for grins, I had installed an UPPER_LIMIT parameter to the F_INFINITE_DUAL function, but it defaults to infinity.
Great idea, Mark!
-Tim
on 9/17/03 6:24 PM, Mark Richard at mrichard_at_transurban.com.au wrote:
>
> 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 ORACLE-L <ORACLE-L_at_fatcity.com>
> <sfaroult_at_oriolec cc:
> orp.com> Subject: RE: Re: SQL help needed
> Sent by:
> ml-errors_at_fatcity
> .com
>
>
> 17/09/2003 18:39
> Please respond to
> ORACLE-L
>
>
>
>
>
>
>
>> ----- ------- Original Message ------- ----- >> From: "Mark Richard" <mrichard_at_transurban.com.au> >> To: Multiple recipients of list ORACLE-L >> <ORACLE-L_at_fatcity.com> >> 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) >>
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Tim Gorman INET: tim_at_sagelogix.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (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 also send the HELP command for other information (like subscribing).Received on Sat Sep 20 2003 - 14:19:43 CDT
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