Re: Base conversion

From: Igor Neyman <ineyman_at_perceptron.com>
Date: Tue, 28 Jan 2003 08:29:10 -0800
Message-ID: <F001.0053C28A.20030128082910@fatcity.com>

Try this:

CREATE FUNCTION to_dec
( p_str in varchar2,
  p_from_base in number default 16 ) return number AS

        l_num   number default 0;
--        l_hex   varchar2(16) default '0123456789ABCDEF';
        l_base   varchar2(16) default '0123456789ABCDEF....YZ';    -- fill

in the blanks
begin

        for i in 1 .. length(p_str) loop
                l_num := l_num * p_from_base +
instr(l_base,upper(substr(p_str,i,1)))-1;
        end loop;
        return l_num;

end
/

HTH, don't forget to fill in l_base local variable. Obviosly, in your case "p_from_base" parameter will be 36.

Igor Neyman, OCP DBA
ineyman_at_perceptron.com

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Tuesday, January 28, 2003 10:45 AM

> For very obscure reasons (read: one of those developer decisions that you
> want to use a time-machine to go back and change), we're storing some
> information in base-36 (0,1,2,3...8,9,A,B,C,...,Y,Z) in a varchar field.
> And you thought hexadecimal was fun :-)
>
> Now some bright spark would like me to build some PL/SQL to do base
> conversion - in the first instance from base 36 to base 10 (i.e decimal).
> Has anyone done something similar in the past ... that I could borrow or
> co-opt? As you've guessed, the deadline is yesterday :-)
>
> Ciao
> Fuzzy
> :-)
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Grant Allen
> INET: grant_at_towersoft.co.uk
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Igor Neyman
  INET: ineyman_at_perceptron.com

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Received on Tue Jan 28 2003 - 10:29:10 CST