RE: A brief detour....;-)

From: Jamadagni, Rajendra <Rajendra.Jamadagni_at_espn.com>
Date: Tue, 09 Dec 2003 05:04:24 -0800
Message-ID: <F001.005D94C6.20031209050424@fatcity.com>

I am just glad that so many on this read /. too ... that's my homepage ... on my Firebird browser.

Raj

Rajendra dot Jamadagni at nospamespn dot com All Views expressed in this email are strictly personal. QOTD: Any clod can have facts, having an opinion is an art !

-----Original Message-----
Bobak, Mark
Sent: Tuesday, December 09, 2003 12:54 AM To: Multiple recipients of list ORACLE-L

Vladimir,

Nice solution! I had first briefly considered a SQL solution, but it didn't immediately come to mind, and the PL/SQL recursive solution was pretty straightforward, so, I went that direction. I wasn't really too concerned about expense, in this case....;-) I don't see too many practical applications. ;-)

-Mark

-----Original Message-----

From:	Vladimir Begun [mailto:Vladimir.Begun_at_oracle.com]
Sent:	Mon 12/8/2003 8:19 PM
To:	Multiple recipients of list ORACLE-L
Cc:	
Subject:	Re: A brief detour....;-)

Bobak, Mark wrote:
> Here it is:

[...]
> This concludes this public service announcement. We now return
> you to our regularly scheduled programming.

Interesting. PL/SQL recursive solutions are expensive, though. :) Did not check it, maybe something alike was posted already...

SET VERIFY OFF PAGES 200
DEFINE disks=7
REM Please do not use all_objects :)
DEFINE big_table=all_objects
COLUMN "Implementation Plan" FORMAT A20
SPOOL hanoi_solution.txt
SELECT 'Move it from '

     || TO_CHAR(MOD(BITAND(ROWNUM, ROWNUM - 1), 3) + 1)
     || ' to '
     || TO_CHAR(MOD(-BITAND(-ROWNUM - 1, -ROWNUM), 3) + 1) AS "Implementation Plan"

   FROM &&big_table
  WHERE ROWNUM < POWER(2, &&disks)
    AND &&disks < 8
/
SPOOL OFF Should work correctly.

Regards,

-- 
Vladimir Begun
The statements and opinions expressed here are my own and
do not necessarily represent those of Oracle Corporation.



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Received on Tue Dec 09 2003 - 07:04:24 CST