Re: equivalent for isdate, isnumeric

Hi!

Boolean is a datatype existing and usable in Oracle. Deterministic is an Oracle way to tell a function is deterministic, i.e. always returning the same result on the same input. Required for FBIs for example.

http://tahiti.oracle.com

Tanel.

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Thursday, September 25, 2003 9:54 PM

> boolean is not SQL datatype and it's unclear what "deterministic"
> means here.
>
> Mladen Gogala wrote:
> > create or replace function
> > isnumeric(str varchar2) return boolean deterministic
> > as
> > num number:=0;
> > begin
> > num:=to_number(str);
> > return(true);
> > exception
> > when others then
> > return(false);
> > end;
> > /
> >
> > --
> > Mladen Gogala
> > Oracle DBA
> --
> Vladimir Begun
> The statements and opinions expressed here are my own and
> do not necessarily represent those of Oracle Corporation.
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Tanel Poder
  INET: tanel.poder.003_at_mail.ee

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