hello
2010/1/12 Yan Cheng Cheok <yccheok@yahoo.com>:
> In c++, whenever we encounter an unexpected parameters, here is what we usually did :
>
> bool fun(int i) {
> if (i < 0) {
> return false;
> }
> }
>
> void fun(int i) {
> if (i < 0) {
> throw std::exception("Invalid parameter");
> }
> }
>
> void fun(int i) {
> assert (i >= 0);
> }
>
> How about stored procedure? Now, I have the following stored procedure :
>
> CREATE OR REPLACE FUNCTION insert_unit(text[], text[])
> RETURNS unit AS
> $BODY$DECLARE
> _measurement_types ALIAS FOR $1;
> _measurement_units ALIAS FOR $2;
> _unit unit;
> BEGIN
> IF array_upper(_measurement_values, 1) != array_upper(_measurement_units, 1) THEN
> RAISE NOTICE 'What I should do here to return early???';
> END IF;
>
> May I know what is the good practice to handle invalid parameters? I am using libpq to interface with PostgreSQL.
see RAISE EXCEPTION
http://www.depesz.com/index.php/2008/05/14/waiting-for-84-plpgsql-raise/
Regards
Pavel Stehule
>
> Thanks and Regards
> Yan Cheng CHEOK
>
>
>
>
>
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