On Mon, Dec 02, 2002 at 08:23:24PM +0100, Szima Gábor wrote:
> OK, but:
>
> template1=# select round('2.001'::numeric);
> round
> -------
> 2
> (1 row)
>
> template1=# select round('2.001'::numeric,2);
> round
> -------
> 2.00
> (1 row)
>
>
> The good idea (in 7.2):
>
> template1=# select text('2.000'::numeric);
> text
> ------
> 2
> (1 row)
>
> template1=# select text('2.001'::numeric);
> text
> -------
> 2.001
> (1 row)
>
>
> This feature is missing from 7.3..
Not sure I'd call it a feature -- ISTM that text(numeric) should show
all the precision you gave it, and not shave it down to the
least-precise number that is still equal.
Anyhoo, you can get what you want with some ugly-but-straightforward
trimming:
(in 7.3):
joel@joel=# select rtrim(rtrim('2.000'::numeric, '0'),'.');rtrim
-------2
(1 row)
joel@joel=# select rtrim(rtrim('2.001'::numeric, '0'),'.');rtrim
-------2.001
(1 row)
Easy enough to make this into a function trim_as_much(numeric) or
somesuch.
--
Joel BURTON | joel@joelburton.com | joelburton.com | aim: wjoelburton
Independent Knowledge Management Consultant