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>Chapter 37. Event Triggers</H1
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>37.1. <A
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>Overview of Event Trigger Behavior</A
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> 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 procedural
language that includes event trigger support, or in C, but not in plain
SQL.
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