Re: Function syntax ?

try

create or replace function fcn_max_dt(p_dt timestamp without time zone,
p_dt2 timestamp without time zone)
returns imestamp without time zone as $$
select greatest($1,$2);
$$ language sql;

or

begin
return greatest(p_dt, p_dt2);
end;
$$ language plpgsql;

or
begin
if p_dt > p_dt2 then
return p_dt;
else
return p_dt2;
end if;
end;
$$ language sql;

plpgsql is scripting language and almost is better minimalize number
of statements in function.

Regards
Pavel Stehule

2008/9/9 Ruben Gouveia <rubes7202(at)gmail(dot)com>:
> Does this syntax look correct? Can anyone think of a better way to write
> this?
>
> This function will accept two timestamp parameters and determine the highest
> of the two?
>
> create or replace function fcn_max_dt(p_dt timestamp without time zone,
> p_dt2 timestamp without time zone)
> returns timestamp without time zone as $$
> DECLARE
> v_dt timestamp without time zone;
> v_dt2 timestamp without time zone;
>
> BEGIN
> v_dt := p_dt;
> v_dt2 := p_dt2;
>
> if v_dt >= v_dt2 then
> return v_dt;
> else
> return v_dt2;
> end if;
>
> END;
> $$ LANGUAGE 'plpgsql';
>
>
>