
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="FUNCTIONS-TRIGGER"
>9.27. Trigger Functions</A
></H1
><P
>      Currently <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> provides one built in trigger
      function, <CODE
CLASS="FUNCTION"
>suppress_redundant_updates_trigger</CODE
>,
      which will prevent any update
      that does not actually change the data in the row from taking place, in
      contrast to the normal behavior which always performs the upda