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Commit81d46ea

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doc: mention trigger helper functions in CREATE TRIGGER docs
Reported-by: petermpallesen@gmail.comDiscussion:https://postgr.es/m/159195294959.673.5752624528747900508@wrigleys.postgresql.orgBackpatch-through: 9.5
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‎doc/src/sgml/ref/create_trigger.sgml

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@@ -457,6 +457,12 @@ UPDATE OF <replaceable>column_name1</replaceable> [, <replaceable>column_name2</
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</para>
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<para>
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There are a few built-in trigger functions that can be used to
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solve common problems without having to write your own trigger code;
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see <xref linkend="functions-trigger"/>.
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</para>
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<para>
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In a <literal>BEFORE</literal> trigger, the <literal>WHEN</literal> condition is
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evaluated just before the function is or would be executed, so using

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