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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>ALTER USER MAPPING</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="sql-alteruser.html" title="ALTER USER" /><link rel="next" href="sql-alterview.html" title="ALTER VIEW" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">ALTER USER MAPPING</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-alteruser.html" title="ALTER USER">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><th width="60%" align="center">SQL Commands</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 14.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-alterview.html" title="ALTER VIEW">Next</a></td></tr></table><hr></hr></div><div class="refentry" id="SQL-ALTERUSERMAPPING"><div class="titlepage"></div><a id="id-1.9.3.44.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">ALTER USER MAPPING</span></h2><p>ALTER USER MAPPING — change the definition of a user mapping</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
+ALTER USER MAPPING FOR { <em class="replaceable"><code>user_name</code></em> | USER | CURRENT_ROLE | CURRENT_USER | SESSION_USER | PUBLIC }
+    SERVER <em class="replaceable"><code>server_name</code></em>
+    OPTIONS ( [ ADD | SET | DROP ] <em class="replaceable"><code>option</code></em> ['<em class="replaceable"><code>value</code></em>'] [, ... ] )
+</pre></div><div class="refsect1" id="id-1.9.3.44.5"><h2>Description</h2><p>
+   <code class="command">ALTER USER MAPPING</code> changes the definition of a
+   user mapping.
+  </p><p>
+   The owner of a foreign server can alter user mappings for that
+   server for any user.  Also, a user can alter a user mapping for
+   their own user name if <code class="literal">USAGE</code> privilege on the server has
+   been granted to the user.
+  </p></div><div class="refsect1" id="id-1.9.3.44.6"><h2>Parameters</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="replaceable"><code>user_name</code></em></span></dt><dd><p>
+      User name of the mapping. <code class="literal">CURRENT_ROLE</code>, <code class="literal">CURRENT_USER</code>,
+      and <code class="literal">USER</code> match the name of the current
+      user. <code class="literal">PUBLIC</code> is used to match all present and future
+      user names in the system.
+     </p></dd><dt><span class="term"><em class="replaceable"><code>server_name</code></em></span></dt><dd><p>
+      Server name of the user mapping.
+     </p></dd><dt><span class="term"><code class="literal">OPTIONS ( [ ADD | SET | DROP ] <em class="replaceable"><code>option</code></em> ['<em class="replaceable"><code>value</code></em>'] [, ... ] )</code></span></dt><dd><p>
+      Change options for the user mapping. The new options override
+      any previously specified
+      options.  <code class="literal">ADD</code>, <code class="literal">SET</code>, and <code class="literal">DROP</code>
+      specify the action to be performed.  <code class="literal">ADD</code> is assumed
+      if no operation is explicitly specified.  Option names must be
+      unique; options are also validated by the server's foreign-data
+      wrapper.
+     </p></dd></dl></div></div><div class="refsect1" id="id-1.9.3.44.7"><h2>Examples</h2><p>
+   Change the password for user mapping <code class="literal">bob</code>, server <code class="literal">foo</code>:
+</p><pre class="programlisting">
+ALTER USER MAPPING FOR bob SERVER foo OPTIONS (SET password 'public');
+</pre></div><div class="refsect1" id="id-1.9.3.44.8"><h2>Compatibility</h2><p>
+   <code class="command">ALTER USER MAPPING</code> conforms to ISO/IEC 9075-9
+   (SQL/MED).  There is a subtle syntax issue: The standard omits
+   the <code class="literal">FOR</code> key word.  Since both <code class="literal">CREATE
+   USER MAPPING</code> and <code class="literal">DROP USER MAPPING</code> use
+   <code class="literal">FOR</code> in analogous positions, and IBM DB2 (being
+   the other major SQL/MED implementation) also requires it
+   for <code class="literal">ALTER USER MAPPING</code>, PostgreSQL diverges from
+   the standard here in the interest of consistency and
+   interoperability.
+  </p></div><div class="refsect1" id="id-1.9.3.44.9"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-createusermapping.html" title="CREATE USER MAPPING"><span class="refentrytitle">CREATE USER MAPPING</span></a>, <a class="xref" href="sql-dropusermapping.html" title="DROP USER MAPPING"><span class="refentrytitle">DROP USER MAPPING</span></a></span></div></div><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sql-alteruser.html" title="ALTER USER">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-alterview.html" title="ALTER VIEW">Next</a></td></tr><tr><td width="40%" align="left" valign="top">ALTER USER </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 14.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> ALTER VIEW</td></tr></table></div></body></html>
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