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+<!--
+doc/src/sgml/ref/drop_trigger.sgml
+PostgreSQL documentation
+-->
+
+<refentry id="sql-droptrigger">
+ <indexterm zone="sql-droptrigger">
+ <primary>DROP TRIGGER</primary>
+ </indexterm>
+
+ <refmeta>
+ <refentrytitle>DROP TRIGGER</refentrytitle>
+ <manvolnum>7</manvolnum>
+ <refmiscinfo>SQL - Language Statements</refmiscinfo>
+ </refmeta>
+
+ <refnamediv>
+ <refname>DROP TRIGGER</refname>
+ <refpurpose>remove a trigger</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+<synopsis>
+DROP TRIGGER [ IF EXISTS ] <replaceable class="parameter">name</replaceable> ON <replaceable class="parameter">table_name</replaceable> [ CASCADE | RESTRICT ]
+</synopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>
+ <command>DROP TRIGGER</command> removes an existing
+ trigger definition. To execute this command, the current
+ user must be the owner of the table for which the trigger is defined.
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>Parameters</title>
+
+ <variablelist>
+
+ <varlistentry>
+ <term><literal>IF EXISTS</literal></term>
+ <listitem>
+ <para>
+ Do not throw an error if the trigger does not exist. A notice is issued
+ in this case.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><replaceable class="parameter">name</replaceable></term>
+ <listitem>
+ <para>
+ The name of the trigger to remove.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><replaceable class="parameter">table_name</replaceable></term>
+ <listitem>
+ <para>
+ The name (optionally schema-qualified) of the table for which
+ the trigger is defined.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>CASCADE</literal></term>
+ <listitem>
+ <para>
+ Automatically drop objects that depend on the trigger,
+ and in turn all objects that depend on those objects
+ (see <xref linkend="ddl-depend"/>).
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><literal>RESTRICT</literal></term>
+ <listitem>
+ <para>
+ Refuse to drop the trigger if any objects depend on it. This is
+ the default.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1 id="sql-droptrigger-examples">
+ <title>Examples</title>
+
+ <para>
+ Destroy the trigger <literal>if_dist_exists</literal> on the table
+ <literal>films</literal>:
+
+<programlisting>
+DROP TRIGGER if_dist_exists ON films;
+</programlisting></para>
+ </refsect1>
+
+ <refsect1 id="sql-droptrigger-compatibility">
+ <title>Compatibility</title>
+
+ <para>
+ The <command>DROP TRIGGER</command> statement in
+ <productname>PostgreSQL</productname> is incompatible with the SQL
+ standard. In the SQL standard, trigger names are not local to
+ tables, so the command is simply <literal>DROP TRIGGER
+ <replaceable>name</replaceable></literal>.
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+
+ <simplelist type="inline">
+ <member><xref linkend="sql-createtrigger"/></member>
+ </simplelist>
+ </refsect1>
+
+</refentry>