operation.
      </p></dd></dl></div></div><div class="sect2" id="LIBPQ-COPY-RECEIVE"><div class="titlepage"><div><div><h3 class="title">34.10.2. Functions for Receiving <code class="command">COPY</code> Data <a href="#LIBPQ-COPY-RECEIVE" class="id_link">#</a></h3></div></div></div><p>
    These functions are used to receive data during <code class="literal">COPY TO
    STDOUT</code>.  They will fail if called when the connection is not in
    <code class="literal">COPY_OUT</code> state.
   </p><div class=