Message-ID: <20040430141145.40776.qmail@web20809.mail.yahoo.com>
Date: Fri, 30 Apr 2004 07:11:45 -0700 (PDT)
From: Jeff Eckermann <jeff_eckermann@yahoo.com>
Subject: Re: isnumeric() function?
To: Yudie <yudie@axiontech.com>, pgsql-sql@postgresql.org
In-Reply-To: <000c01c42e3b$cc18c4e0$8401a8c0@home.axiontech.com>
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--- Yudie <yudie@axiontech.com> wrote:
> What is isnumeric function in postgresql? 
> I'm using psql version 7.2.2
> thanks
> Yudie

I don't think that function is included as such.  But
you could do something like:

CREATE FUNCTION isnumeric(text) RETURNS boolean AS '
SELECT $1 ~ ''^[0-9]+$''
' LANGUAGE 'sql';

Note that you would need to create this function for
every parameter datatype that you would intend to use,
or else be prepared to cast your input datatype as
appropriate.

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