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Re: isnumeric() function?

From: Jeff Eckermann <jeff_eckermann(at)yahoo(dot)com>
To: Yudie <yudie(at)axiontech(dot)com>, pgsql-sql(at)postgresql(dot)org
Subject: Re: isnumeric() function?
Date: 2004-04-30 14:11:45
Message-ID: 20040430141145.40776.qmail@web20809.mail.yahoo.com (view raw or flat)
Thread:
Lists: pgsql-sql
--- Yudie <yudie(at)axiontech(dot)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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