<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/alter_aggregate.sgml,v 1.1 2003/06/27 14:45:25 petere Exp $
PostgreSQL documentation
-->

<refentry id="SQL-ALTERAGGREGATE">
 <refmeta>
  <refentrytitle id="SQL-ALTERAGGREGATE-TITLE">ALTER AGGREGATE</refentrytitle>
  <refmiscinfo>SQL - Language Statements</refmiscinfo>
 </refmeta>

 <refnamediv>
  <refname>ALTER AGGREGATE</refname>
  <refpurpose>change the definition of an aggregate function</refpurpose>
 </refnamediv>  
  
 <refsynopsisdiv>
<synopsis>
ALTER AGGREGATE <replaceable>name</replaceable> ( <replaceable>type</replaceable> ) RENAME TO <replaceable>newname</replaceable>
</synopsis>
 </refsynopsisdiv>
  
 <refsect1>
  <title>Description</title>

  <para>
   <command>ALTER AGGREGATE</command> changes the definition of an
   aggregate function.  The only functionality is to rename the
   aggregate function.
  </para>
 </refsect1>
  
 <refsect1>
  <title>Parameters</title>

  <variablelist>
   <varlistentry>
    <term><replaceable class="parameter">name</replaceable></term>
    <listitem>
     <para>
      The name (optionally schema-qualified) of an existing aggregate function.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">type</replaceable></term>
    <listitem>
     <para>
      The argument data type of the aggregate function, or
      <literal>*</literal> if the function accepts any data type.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><replaceable class="parameter">newname</replaceable></term>
    <listitem>
     <para>
      The new name of the aggregate function.
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>
   
 <refsect1>
  <title>Diagnostics</title>

  <variablelist>
   <varlistentry>
    <term><computeroutput>ALTER AGGREGATE</computeroutput></term>
    <listitem>
     <para>
      Message returned if the command was successful.
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

 <refsect1>
  <title>Examples</title>

  <para>
   To rename the aggregate function <literal>myavg</literal> for type
   <type>integer</type> to <literal>my_average</literal>:
<programlisting>
ALTER AGGREGATE myavg(integer) RENAME TO my_average;
</programlisting>
  </para>
 </refsect1>

 <refsect1>
  <title>Compatibility</title>

  <para>
   There is no <command>ALTER AGGREGATE</command> statement in the SQL
   standard.
  </para>
 </refsect1>

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

  <simplelist type="inline">
   <member><xref linkend="sql-createaggregate" endterm="sql-createaggregate-title"></member>
   <member><xref linkend="sql-dropaggregate" endterm="sql-dropaggregate-title"></member>
  </simplelist>
 </refsect1>
</refentry>

<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:nil
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
sgml-parent-document:nil
sgml-default-dtd-file:"../reference.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:"/usr/lib/sgml/catalog"
sgml-local-ecat-files:nil
End:
-->
