doc/src/sgml/ref/drop_policy.sgml - master - githubmirror/postgres

doc/src/sgml/ref/drop_policy.sgml
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Peter Eisentraut
doc: Improve hyphenation consistency
21 апр 2021, 09:14
21 апр 2021, 09:14544b280
<!--
doc/src/sgml/ref/drop_policy.sgml
PostgreSQL documentation
-->

<refentry id="sql-droppolicy">
 <indexterm zone="sql-droppolicy">
  <primary>DROP POLICY</primary>
 </indexterm>

 <refmeta>
  <refentrytitle>DROP POLICY</refentrytitle>
  <manvolnum>7</manvolnum>
  <refmiscinfo>SQL - Language Statements</refmiscinfo>
 </refmeta>

 <refnamediv>
  <refname>DROP POLICY</refname>
  <refpurpose>remove a row-level security policy from a table</refpurpose>
 </refnamediv>

 <refsynopsisdiv>
<synopsis>
DROP POLICY [ 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 POLICY</command> removes the specified policy from the table.
   Note that if the last policy is removed for a table and the table still has
   row-level security enabled via <command>ALTER TABLE</command>, then the
   default-deny policy will be used.  <literal>ALTER TABLE ... DISABLE ROW
   LEVEL SECURITY</literal> can be used to disable row-level security for a
   table, whether policies for the table exist or not.
  </para>
 </refsect1>

 <refsect1>
  <title>Parameters</title>

  <variablelist>

   <varlistentry>
    <term><literal>IF EXISTS</literal></term>
    <listitem>
     <para>
      Do not throw an error if the policy 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 policy to drop.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">table_name</replaceable></term>
    <listitem>
     <para>
      The name (optionally schema-qualified) of the table that
      the policy is on.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><literal>CASCADE</literal></term>
    <term><literal>RESTRICT</literal></term>

    <listitem>
     <para>
      These key words do not have any effect, since there are no
      dependencies on policies.
     </para>
    </listitem>
   </varlistentry>

  </variablelist>
 </refsect1>

 <refsect1>
  <title>Examples</title>

  <para>
   To drop the policy called <literal>p1</literal> on the table named
   <literal>my_table</literal>:

<programlisting>
DROP POLICY p1 ON my_table;
</programlisting></para>
 </refsect1>

 <refsect1>
  <title>Compatibility</title>

  <para>
   <command>DROP POLICY</command> is a <productname>PostgreSQL</productname> extension.
  </para>
 </refsect1>

 <refsect1>
  <title>See Also</title>

  <simplelist type="inline">
   <member><xref linkend="sql-createpolicy"/></member>
   <member><xref linkend="sql-alterpolicy"/></member>
  </simplelist>
 </refsect1>

</refentry>