timestamp</TT
> type by calling the
     <CODE
CLASS="FUNCTION"
>text_out</CODE
> and <CODE
CLASS="FUNCTION"
>timestamp_in</CODE
>
     functions for the conversion.  So, the computed time stamp is updated
     on each execution as the programmer expects.  Even though this
     happens to work as expected, it's not terribly efficient, so
     use of the <TT
CLASS="LITERAL"
>now()</TT
> function would still be a better idea.
    </P
></DIV
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
