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<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_rule.sgml,v 1.17 2003/05/04 02:23:16 petere Exp $
PostgreSQL documentation
-->
<refentry id="SQL-DROPRULE">
<refmeta>
<refentrytitle id="SQL-DROPRULE-TITLE">DROP RULE</refentrytitle>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>DROP RULE</refname>
<refpurpose>remove a rewrite rule</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
DROP RULE <replaceable class="PARAMETER">name</replaceable> ON <replaceable class="PARAMETER">relation</replaceable> [ CASCADE | RESTRICT ]
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>DROP RULE</command> drops a rewrite rule.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><replaceable class="parameter">name</replaceable></term>
<listitem>
<para>
The name of the rule to drop.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">relation</replaceable></term>
<listitem>
<para>
The name (optionally schema-qualified) of the table or view that
the rule applies to.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>CASCADE</literal></term>
<listitem>
<para>
Automatically drop objects that depend on the rule.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>RESTRICT</literal></term>
<listitem>
<para>
Refuse to drop the rule if any objects depend on it. This is
the default.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Diagnostics</title>
<variablelist>
<varlistentry>
<term><computeroutput>DROP RULE</computeroutput></term>
<listitem>
<para>
Message returned if the command was successful.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><computeroutput>ERROR: Rule "<replaceable class="parameter">name</replaceable>" not found</computeroutput></term>
<listitem>
<para>
Message if the specified rule does not exist.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
To drop the rewrite rule <literal>newrule</literal>:
<programlisting>
DROP RULE newrule ON mytable;
</programlisting>
</para>
</refsect1>
<refsect1>
<title>Compatibility</title>
<para>
There is no <command>DROP RULE</command> statement in the SQL standard.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createrule" endterm="sql-createrule-title"></member>
</simplelist>
</refsect1>
</refentry>
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