is trigger will actually make the update run slower.
    </P
><P
>      The <CODE
CLASS="FUNCTION"
>suppress_redundant_updates_trigger</CODE
> function can be
      added to a table like this:
</P><PRE
CLASS="PROGRAMLISTING"
>CREATE TRIGGER z_min_update
BEFORE UPDATE ON tablename
FOR EACH ROW EXECUTE PROCEDURE suppress_redundant_updates_trigger();</PRE
><P>
      In most cases, you would want to fire this trigger last for each row.
      Bearing in mind that triggers fire in name order, you would then
     