drop_tablespace.sgml

postgresql8.3.4源码,开源数据库

<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/drop_tablespace.sgml,v 1.7 2007/06/03 17:06:13 tgl Exp $
PostgreSQL documentation
-->

<refentry id="SQL-DROPTABLESPACE">
 <refmeta>
  <refentrytitle id="SQL-DROPTABLESPACE-TITLE">DROP TABLESPACE</refentrytitle>
  <refmiscinfo>SQL - Language Statements</refmiscinfo>
 </refmeta>

 <refnamediv>
  <refname>DROP TABLESPACE</refname>
  <refpurpose>remove a tablespace</refpurpose>
 </refnamediv>

 <indexterm zone="sql-droptablespace">
  <primary>DROP TABLESPACE</primary>
 </indexterm>

 <refsynopsisdiv>
<synopsis>
DROP TABLESPACE [ IF EXISTS ] <replaceable class="PARAMETER">tablespacename</replaceable>
</synopsis>
 </refsynopsisdiv>

 <refsect1>
  <title>Description</title>

  <para>
   <command>DROP TABLESPACE</command> removes a tablespace from the system.
  </para>

  <para>
   A tablespace can only be dropped by its owner or a superuser.
   The tablespace must be empty of all database objects before it can be
   dropped. It is possible that objects in other databases might still reside
   in the tablespace even if no objects in the current database are using
   the tablespace.  Also, if the tablespace is listed in the <xref
   linkend="guc-temp-tablespaces"> setting of any active session, the
   <command>DROP</> might fail due to temporary files residing in the
   tablespace.
  </para>
 </refsect1>

 <refsect1>
  <title>Parameters</title>

  <variablelist>

   <varlistentry>
    <term><literal>IF EXISTS</literal></term>
    <listitem>
     <para>
      Do not throw an error if the tablespace does not exist. A notice is issued 
      in this case.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="PARAMETER">tablespacename</replaceable></term>
    <listitem>
     <para>
      The name of a tablespace.
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

 <refsect1>
  <title>Notes</title>

   <para>
    <command>DROP TABLESPACE</> cannot be executed inside a transaction block.
   </para>
 </refsect1>


 <refsect1>
  <title>Examples</title>

  <para>
   To remove tablespace <literal>mystuff</literal> from the system:
<programlisting>
DROP TABLESPACE mystuff;
</programlisting>
  </para>
 </refsect1>

 <refsect1>
  <title>Compatibility</title>

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

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

  <simplelist type="inline">
   <member><xref linkend="sql-createtablespace" endterm="sql-createtablespace-title"></member>
   <member><xref linkend="sql-altertablespace" endterm="sql-altertablespace-title"></member>
  </simplelist>
 </refsect1>

</refentry>