Le mardi 09 août 2011 à 15:57 -0700, Postgres User a écrit :
>
>
> From a db function, I'd like to force the use of default when an input
> parameter is null.
May be something like this :
CREATE TABLE users (
id bigint NOT NULL,
username text NOT NULL,
is_active boolean DEFAULT false
);
CREATE FUNCTION new_user (text, boolean default 't') RETURNS SETOF users
AS $$
INSERT INTO users(username, is_active) VALUES($1, $2) RETURNING *;
$$ LANGUAGE SQL;
select new_user('no_status_defined');
new_user
--------------------------
(10,no_status_defined,t)
(1 ligne)
As you can see, in the case where the second parameter is absent, the
default set by the function (true) is used.
http://www.postgresql.org/docs/9.0/static/xfunc-sql.html#XFUNC-SQL-PARAMETER-DEFAULTS
It won't work if NOT NULL is set on the field.
--
Vincent Veyron
http://marica.fr/
Logiciel de gestion des sinistres et des contentieux pour le service juridique
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