 change of this parameter doesn't affect any existing
      connections until they are re-established.
     </p><p>
      <code class="varname">postgres_fdw.application_name</code> can be any string
      of any length and contain even non-ASCII characters.  However when
      it's passed to and used as <code class="varname">application_name</code>
      in a foreign server, note that it will be truncated to less than
      <code class="symbol">NAMEDATALEN</code> characters.
      Anything other than printa