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

doc/src/sgml/ref/drop_server.sgml
118 строк3 KB
Jeff Davis
Improve DROP SERVER handling of dependent subscriptions.
03 авг 2026, 23:21
03 авг 2026, 23:21b66ea17
<!--
doc/src/sgml/ref/drop_server.sgml
PostgreSQL documentation
-->

<refentry id="sql-dropserver">
 <indexterm zone="sql-dropserver">
  <primary>DROP SERVER</primary>
 </indexterm>

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

 <refnamediv>
  <refname>DROP SERVER</refname>
  <refpurpose>remove a foreign server descriptor</refpurpose>
 </refnamediv>

 <refsynopsisdiv>
<synopsis>
DROP SERVER [ IF EXISTS ] <replaceable class="parameter">name</replaceable> [, ...] [ CASCADE | RESTRICT ]
</synopsis>
 </refsynopsisdiv>

 <refsect1>
  <title>Description</title>

  <para>
   <command>DROP SERVER</command> removes an existing foreign server
   descriptor.  To execute this command, the current user must be the
   owner of the server.
  </para>
 </refsect1>

 <refsect1>
  <title>Parameters</title>

  <variablelist>
   <varlistentry>
    <term><literal>IF EXISTS</literal></term>
    <listitem>
     <para>
      Do not throw an error if the server 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 an existing server.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><literal>CASCADE</literal></term>
    <listitem>
     <para>
      Automatically drop objects that depend on the server (such as
      user mappings),
      and in turn all objects that depend on those objects
      (see <xref linkend="ddl-depend"/>).
      However, a subscription that uses the server is never dropped
      automatically; it must be dropped with
      <link linkend="sql-dropsubscription"><command>DROP SUBSCRIPTION</command></link>
      before the server can be dropped.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><literal>RESTRICT</literal></term>
    <listitem>
     <para>
      Refuse to drop the server if any objects depend on it.  This is
      the default.
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

 <refsect1>
  <title>Examples</title>

  <para>
   Drop a server <literal>foo</literal> if it exists:
<programlisting>
DROP SERVER IF EXISTS foo;
</programlisting></para>
 </refsect1>

 <refsect1>
  <title>Compatibility</title>

  <para>
   <command>DROP SERVER</command> conforms to ISO/IEC 9075-9
   (SQL/MED).  The <literal>IF EXISTS</literal> clause is
   a <productname>PostgreSQL</productname> extension.
  </para>
 </refsect1>

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

  <simplelist type="inline">
   <member><xref linkend="sql-createserver"/></member>
   <member><xref linkend="sql-alterserver"/></member>
  </simplelist>
 </refsect1>

</refentry>