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<!--
doc/src/sgml/ref/alter_rule.sgml
PostgreSQL documentation
-->
<refentry id="sql-alterrule">
<indexterm zone="sql-alterrule">
<primary>ALTER RULE</primary>
</indexterm>
<refmeta>
<refentrytitle>ALTER RULE</refentrytitle>
<manvolnum>7</manvolnum>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>ALTER RULE</refname>
<refpurpose>change the definition of a rule</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
ALTER RULE <replaceable class="parameter">name</replaceable> ON <replaceable class="parameter">table_name</replaceable> RENAME TO <replaceable class="parameter">new_name</replaceable>
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>ALTER RULE</command> changes properties of an existing
rule. Currently, the only available action is to change the rule's name.
</para>
<para>
To use <command>ALTER RULE</command>, you must own the table or view that
the rule applies to.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><replaceable class="parameter">name</replaceable></term>
<listitem>
<para>
The name of an existing rule to alter.
</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><replaceable class="parameter">new_name</replaceable></term>
<listitem>
<para>
The new name for the rule.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
To rename an existing rule:
<programlisting>
ALTER RULE notify_all ON emp RENAME TO notify_me;
</programlisting></para>
</refsect1>
<refsect1>
<title>Compatibility</title>
<para>
<command>ALTER 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-droprule"/></member>
</simplelist>
</refsect1>
</refentry>
|
