From: | "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com> |
---|---|
To: | "Ruben Gouveia" <rubes7202(at)gmail(dot)com> |
Cc: | pgsql-sql <pgsql-sql(at)postgresql(dot)org> |
Subject: | Re: Function syntax ? |
Date: | 2008-09-09 18:05:34 |
Message-ID: | 162867790809091105l73b1d18bt7b14ef70d5601b08@mail.gmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-sql |
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';
>
>
>
From | Date | Subject | |
---|---|---|---|
Next Message | Scott Marlowe | 2008-09-09 18:07:55 | Re: Function syntax ? |
Previous Message | Ruben Gouveia | 2008-09-09 17:55:28 | Function syntax ? |