<literal>NO</literal> is specified.
      A procedure that's marked as dependent on an extension is dropped when the
      extension is dropped, even if cascade is not specified.
      A procedure can depend upon multiple extensions, and will be dropped when
      any one of those extensions is dropped.
     </para>
    </listitem>
   </varlistentry>

   <varlistentry>
    <term><literal><optional> EXTERNAL </optional> SECURITY INVOKER</literal></term>
    <term><literal><optional> EXTERNAL </optional> SECURITY DEFINER</literal></term>

    <listitem>
     <para>
      Change whether the procedure is a security definer or not. The
      key word <literal>EXTERNAL</literal> is ignored for SQL
      conformance. See <xref linkend="sql-createprocedure"/> for more information about
      this capability.
     </para>
    </listitem>
   </varlistentry>

     <varlistentry>
      <term><replaceable>configuration_parameter</replaceable></term>
      <term><replaceable>value</replaceable></term>
      <listitem>
       <para>
        Add or change the assignment to be made to a configuration parameter
        when the procedure is called.  If
        <replaceable>value</replaceable> is <literal>DEFAULT</literal>
        or, equivalently, <literal>RESET</literal> is used, the procedure-local
        setting is removed, so that the procedure executes with the value
        present in its environment.  Use <literal>RESET
        ALL</literal> to clear all procedure-local settings.
        <literal>SET FROM CURRENT</literal> saves the value of the parameter that
        is current when <command>ALTER PROCEDURE</command> is executed as the value
        to be applied when the procedure is entered.
       </para>

       <para>
        See <xref linkend="sql-set"/> and
        <xref linkend="runtime-config"/>
        for more information about allowed parameter names and values.
       </para>
      </listitem>
     </varlistentry>

   <varlistentry>
    <term><literal>RESTRICT</literal></term>

    <listitem>
     <para>
      Ignored for conformance with the SQL standard.
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

 <refsect1>
  <title>Examples</title>

  <para>
   To rename the procedure <literal>insert_data</literal> with two arguments
   of type <type>integer</type> to <literal>insert_record</literal>:
<programlisting>