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postgres/doc/src/sgml/ref/drop_rule.sgml
Peter Eisentraut bb4eefe7bf doc: Improve DocBook XML validity
DocBook XML is superficially compatible with DocBook SGML but has a
slightly stricter DTD that we have been violating in a few cases.
Although XSLT doesn't care whether the document is valid, the style
sheets don't necessarily process invalid documents correctly, so we need
to work toward fixing this.

This first commit moves the indexterms in refentry elements to an
allowed position.  It has no impact on the output.
2014-02-23 21:31:08 -05:00

122 lines
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<!--
doc/src/sgml/ref/drop_rule.sgml
PostgreSQL documentation
-->
<refentry id="SQL-DROPRULE">
<indexterm zone="sql-droprule">
<primary>DROP RULE</primary>
</indexterm>
<refmeta>
<refentrytitle>DROP RULE</refentrytitle>
<manvolnum>7</manvolnum>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>DROP RULE</refname>
<refpurpose>remove a rewrite rule</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
DROP RULE [ 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 RULE</command> drops a rewrite rule.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><literal>IF EXISTS</literal></term>
<listitem>
<para>
Do not throw an error if the rule 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 rule to drop.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">table_name</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>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>
<command>DROP RULE</command> is a
<productname>PostgreSQL</productname> language extension, as is the
entire query rewrite system.
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-createrule"></member>
<member><xref linkend="sql-alterrule"></member>
</simplelist>
</refsect1>
</refentry>