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131 lines
3.5 KiB
Plaintext
131 lines
3.5 KiB
Plaintext
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_constraint.sgml,v 1.9 2003/04/22 10:08:08 petere Exp $
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PostgreSQL documentation
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-->
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<refentry id="SQL-CREATECONSTRAINT">
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<refmeta>
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<refentrytitle id="sql-createconstraint-title">CREATE CONSTRAINT TRIGGER</refentrytitle>
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<refmiscinfo>SQL - Language Statements</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>CREATE CONSTRAINT TRIGGER</refname>
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<refpurpose>define a new constraint trigger</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<synopsis>
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CREATE CONSTRAINT TRIGGER <replaceable class="parameter">name</replaceable>
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AFTER <replaceable class="parameter">events</replaceable> ON
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<replaceable class="parameter">table</replaceable> <replaceable class="parameter">constraint</replaceable> <replaceable class="parameter">attributes</replaceable>
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FOR EACH ROW EXECUTE PROCEDURE <replaceable class="parameter">func</replaceable> ( <replaceable class="parameter">args</replaceable> )
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</synopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>
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<command>CREATE CONSTRAINT TRIGGER</command> is used within
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<command>CREATE TABLE</command>/<command>ALTER TABLE</command> and by
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<application>pg_dump</application> to create the special triggers for
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referential integrity.
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It is not intended for general use.
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</para>
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</refsect1>
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<refsect1>
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<title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><replaceable class="PARAMETER">name</replaceable></term>
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<listitem>
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<para>
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The name of the constraint trigger.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="PARAMETER">events</replaceable></term>
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<listitem>
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<para>
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The event categories for which this trigger should be fired.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="PARAMETER">table</replaceable></term>
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<listitem>
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<para>
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The name (possibly schema-qualified) of the table in which
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the triggering events occur.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="PARAMETER">constraint</replaceable></term>
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<listitem>
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<para>
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Actual constraint specification.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="PARAMETER">attributes</replaceable></term>
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<listitem>
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<para>
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The constraint attributes.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="PARAMETER">func</replaceable>(<replaceable class="PARAMETER">args</replaceable>)</term>
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<listitem>
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<para>
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The function to call as part of the trigger processing.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Diagnostics</title>
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<variablelist>
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<varlistentry>
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<term><computeroutput>CREATE TRIGGER</computeroutput></term>
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<listitem>
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<para>
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Message returned if successful.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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</refentry>
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Local variables:
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mode: sgml
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sgml-default-dtd-file:"../reference.ced"
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sgml-local-catalogs:"/usr/lib/sgml/catalog"
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End:
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-->
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