doc/src/sgml/ref/drop_user_mapping.sgml

   1 <!--
   2 $PostgreSQL$
   3 PostgreSQL documentation
   4 -->
   5
   6 <refentry id="SQL-DROPUSERMAPPING">
   7  <refmeta>
   8   <refentrytitle id="sql-dropusermapping-title">DROP USER MAPPING</refentrytitle>
   9   <manvolnum>7</manvolnum>
  10   <refmiscinfo>SQL - Language Statements</refmiscinfo>
  11  </refmeta>
  12
  13  <refnamediv>
  14   <refname>DROP USER MAPPING</refname>
  15   <refpurpose>remove a user mapping for a foreign server</refpurpose>
  16  </refnamediv>
  17
  18  <indexterm zone="sql-dropusermapping">
  19   <primary>DROP USER MAPPING</primary>
  20  </indexterm>
  21
  22  <refsynopsisdiv>
  23 <synopsis>
  24 DROP USER MAPPING [ IF EXISTS ] FOR { <replaceable class="parameter">username</replaceable> | USER | CURRENT_USER | PUBLIC } SERVER <replaceable class="parameter">servername</replaceable>
  25 </synopsis>
  26  </refsynopsisdiv>
  27
  28  <refsect1>
  29   <title>Description</title>
  30
  31   <para>
  32    <command>DROP USER MAPPING</command> removes an existing user
  33    mapping from foreign server.
  34   </para>
  35
  36   <para>
  37    The owner of a foreign server can drop user mappings for that server
  38    for any user.  Also, a user can drop a user mapping for his own
  39    user name if <literal>USAGE</> privilege on the server has been
  40    granted to the user.
  41   </para>
  42  </refsect1>
  43
  44  <refsect1>
  45   <title>Parameters</title>
  46
  47   <variablelist>
  48    <varlistentry>
  49     <term><literal>IF EXISTS</literal></term>
  50     <listitem>
  51      <para>
  52       Do not throw an error if the user mapping does not exist.  A
  53       notice is issued in this case.
  54      </para>
  55     </listitem>
  56    </varlistentry>
  57
  58    <varlistentry>
  59     <term><replaceable class="parameter">username</replaceable></term>
  60     <listitem>
  61      <para>
  62       User name of the mapping.  <literal>CURRENT_USER</>
  63       and <literal>USER</> match the name of the current
  64       user.  <literal>PUBLIC</> is used to match all present and
  65       future user names in the system.
  66      </para>
  67     </listitem>
  68    </varlistentry>
  69
  70    <varlistentry>
  71     <term><replaceable class="parameter">servername</replaceable></term>
  72     <listitem>
  73      <para>
  74       Server name of the user mapping.
  75      </para>
  76     </listitem>
  77    </varlistentry>
  78     </variablelist>
  79  </refsect1>
  80
  81  <refsect1>
  82   <title>Examples</title>
  83
  84   <para>
  85    Drop a user mapping <literal>bob</>, server <literal>foo</> if it exists:
  86 <programlisting>
  87 DROP USER MAPPING IF EXISTS FOR bob SERVER foo;
  88 </programlisting>
  89   </para>
  90  </refsect1>
  91
  92  <refsect1>
  93   <title>Compatibility</title>
  94
  95   <para>
  96    <command>DROP USER MAPPING</command> conforms to ISO/IEC 9075-9
  97    (SQL/MED).  The <literal>IF EXISTS</> clause is
  98    a <productname>PostgreSQL</> extension.
  99   </para>
 100  </refsect1>
 101
 102  <refsect1>
 103   <title>See Also</title>
 104
 105   <simplelist type="inline">
 106    <member><xref linkend="sql-createusermapping" endterm="sql-createusermapping-title"></member>
 107    <member><xref linkend="sql-alterusermapping" endterm="sql-alterusermapping-title"></member>
 108   </simplelist>
 109  </refsect1>
 110
 111 </refentry>