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The endterm attribute is mainly useful when the toolchain does not support automatic link target text generation for a particular situation. In the past, this was required by the man page tools for all reference page links, but that is no longer the case, and it now actually gets in the way of proper automatic link text generation. The only remaining use cases are currently xrefs to refsects.
127 lines
3.0 KiB
Plaintext
127 lines
3.0 KiB
Plaintext
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$PostgreSQL: pgsql/doc/src/sgml/ref/drop_trigger.sgml,v 1.24 2010/04/03 07:23:01 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>DROP TRIGGER</refentrytitle>
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<manvolnum>7</manvolnum>
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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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<indexterm zone="sql-droptrigger">
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<primary>DROP TRIGGER</primary>
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</indexterm>
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<refsynopsisdiv>
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<synopsis>
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DROP TRIGGER [ IF EXISTS ] <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> removes 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><literal>IF EXISTS</literal></term>
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<listitem>
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<para>
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Do not throw an error if the trigger does not exist. A notice is issued
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in this case.
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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">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 the table for which
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the 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 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"></member>
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</simplelist>
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</refsect1>
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</refentry>
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