tml"
>A Complete Event Trigger Example</A
></DT
></DL
></DIV
><P
>   To supplement the trigger mechanism discussed in <A
HREF="triggers.html"
>Chapter 36</A
>,
   <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> also provides event triggers.  Unlike regular
   triggers, which are attached to a single table and capture only DML events,
   event triggers are global to a particular database and are capable of
   capturing DDL events.
  </P
><P
>   Like regular triggers, event triggers can be written in any proced