      once is determined in a similar way to the insert case, but it is
       limited to at most 1000 due to implementation restrictions of the
       <code class="command">COPY</code> command.
      </p></dd></dl></div></div><div class="sect3" id="POSTGRES-FDW-OPTIONS-ASYNCHRONOUS-EXECUTION"><div class="titlepage"><div><div><h4 class="title">F.38.1.5. Asynchronous Execution Options <a href="#POSTGRES-FDW-OPTIONS-ASYNCHRONOUS-EXECUTION" class="id_link">#</a></h4></div></div></div><p>
    <code class="file