TION stamp_user(id int, comment text) RETURNS void AS $$
    #variable_conflict use_variable
    DECLARE
        curtime timestamp := now();
    BEGIN
        UPDATE users SET last_modified = curtime, comment = comment
          WHERE users.id = id;
    END;
$$ LANGUAGE plpgsql;</PRE
><P>
    In the <TT
CLASS="LITERAL"
>UPDATE</TT
> command, <TT
CLASS="LITERAL"
>curtime</TT
>, <TT
CLASS="LITERAL"
>comment</TT
>,
    and <TT
CLASS="LITERAL"
>id</TT
> will refer to the function's variable and parameters
    w