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152 lines
3.7 KiB
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152 lines
3.7 KiB
Plaintext
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_trigger.sgml,v 1.15 2003/05/04 02:23:16 petere Exp $
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PostgreSQL documentation
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-->
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<refentry id="SQL-DROPTRIGGER">
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<refmeta>
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<refentrytitle id="SQL-DROPTRIGGER-TITLE">DROP 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>DROP TRIGGER</refname>
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<refpurpose>remove a trigger</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<synopsis>
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DROP TRIGGER <replaceable class="PARAMETER">name</replaceable> ON <replaceable class="PARAMETER">table</replaceable> [ CASCADE | RESTRICT ]
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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>DROP TRIGGER</command> will remove an existing
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trigger definition. To execute this command, the current
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user must be the owner of the table for which the trigger is defined.
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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 trigger to remove.
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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 (optionally schema-qualified) of a table for which the
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trigger is defined.
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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><literal>CASCADE</literal></term>
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<listitem>
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<para>
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Automatically drop objects that depend on the 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><literal>RESTRICT</literal></term>
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<listitem>
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<para>
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Refuse to drop the trigger if any objects depend on it. This is
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the default.
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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>DROP TRIGGER</computeroutput></term>
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<listitem>
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<para>
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Message returned if the trigger was successfully dropped.
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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><computeroutput>ERROR: DropTrigger: there is no trigger <replaceable class="PARAMETER">name</replaceable> on relation "<replaceable class="parameter">table</replaceable>"</computeroutput></term>
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<listitem>
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<para>
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Message returned if the specified trigger does not exist.
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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 id="SQL-DROPTRIGGER-examples">
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<title>Examples</title>
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<para>
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Destroy the trigger <literal>if_dist_exists</literal> on the table
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<literal>films</literal>:
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<programlisting>
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DROP TRIGGER if_dist_exists ON films;
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</programlisting>
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</para>
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</refsect1>
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<refsect1 id="SQL-DROPTRIGGER-compatibility">
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<title>Compatibility</title>
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<para>
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The <command>DROP TRIGGER</command> statement in
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<productname>PostgreSQL</productname> is incompatible with the SQL
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standard. In the SQL standard, trigger names are not local to
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tables, so the command is simply <literal>DROP TRIGGER
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<replaceable>name</replaceable></literal>.
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</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<simplelist type="inline">
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<member><xref linkend="sql-createtrigger" endterm="sql-createtrigger-title"></member>
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</simplelist>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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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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