index 1c2d17725091ac3a0c555131c850089478c75ac1..fb8996ac15bab5573bad663342ad1535edb48aeb 100644 (file)
@@ -457,6 +457,12 @@ UPDATE OF <replaceable>column_name1</replaceable> [, <replaceable>column_name2</
value did not change.
</para>
+ <para>
+ There are a few built-in trigger functions that can be used to
+ solve common problems without having to write your own trigger code;
+ see <xref linkend="functions-trigger"/>.
+ </para>
+
<para>
In a <literal>BEFORE</literal> trigger, the <literal>WHEN</literal> condition is
evaluated just before the function is or would be executed, so using