Re: rounding down a number

Why not create a wrapper function? Something along the lines of:

CREATE OR REPLACE FUNCTION f_round( NUMERIC ) RETURNS INTEGER AS '
DECLARE

original_number ALIAS FOR $1;
rounded_number INTEGER;

BEGIN

rounded_number := ROUND( original_number );
IF rounded_number = original_number + 0.5 THEN

rounded_number := rounded_number - 1;

END IF;

RETURN rounded_number;

END;
' LANGUAGE 'plpgsql';

SELECT f_round( 100.0 ) FROM team LIMIT 1;
SELECT f_round( 100.1 ) FROM team LIMIT 1;
SELECT f_round( 100.4 ) FROM team LIMIT 1;
SELECT f_round( 100.4999999999 ) FROM team LIMIT 1;
SELECT f_round( 100.5 ) FROM team LIMIT 1;
SELECT f_round( 100.5000000001 ) FROM team LIMIT 1;
SELECT f_round( 100.6 ) FROM team LIMIT 1;
SELECT f_round( 100.9 ) FROM team LIMIT 1;

f_round
---------
100
(1 row)

f_round
---------
100
(1 row)

f_round
---------
100
(1 row)

f_round
---------
100
(1 row)

f_round
---------
100
(1 row)

f_round
---------
101
(1 row)

f_round
---------
101
(1 row)

f_round
---------
101
(1 row)
-----Original Message-----
From: pgsql-novice-owner(at)postgresql(dot)org
[mailto:pgsql-novice-owner(at)postgresql(dot)org]On Behalf Of Michael
Sent: 30 March 2007 22:39
To: pgsql-novice(at)postgresql(dot)org
Subject: [NOVICE] rounding down a number

Hi,

I'm trying to round down any number with a half, but keep the round
function for all other fractions.

For example

100.1 becomes 100

100.4 becomes 100

100.5 becomes 100 (this one would ordinarily round to 101)

100.6 becomes 101

100.9 becomes 101

Thanks, Mick