You forgot to escape the quotes:
CREATE OR REPLACE FUNCTION getnumber(varchar(1)) RETURNS integer AS '
BEGIN
return ($1 ~ ''[0-9]'');
END;
' LANGUAGE 'plpgsql';
> -----Original Message-----
> From: pgsql-general-owner@postgresql.org
> [mailto:pgsql-general-owner@postgresql.org]On Behalf Of Ron St.Pierre
> Sent: Tuesday, January 28, 2003 5:56 PM
> To: pgsql-general@postgresql.org
> Subject: [GENERAL] is_numeric() or extract_numeric() functions?
>
>
> I can't find an is_numeric() or extract_numeric() function in postgres
> so I decided I would make my own. However, when I try to create the
> following function:
>
>
> CREATE OR REPLACE FUNCTION getnumber(varchar(1)) RETURNS integer AS '
> BEGIN
> return ($1 ~ '[0-9]');
> END;
> ' LANGUAGE 'plpgsql';
>
>
> I get the following error:
>
> parse error at or near "["
>
>
> Anyone know how to fix this, or if there is an is_numeric() or
> extract_numeric() function available?
>
> Thanks
>
> --
> Ron St.Pierre
> Syscor R&D
> tel: 250-361-1681
> email: rstpierre@syscor.com
>
>
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