nction">PQputline</code></a> call; it is okay to send a partial
       line or multiple lines per call.
      </p><div class="note"><h3 class="title">Note</h3><p>
        Before <span class="productname">PostgreSQL</span> protocol 3.0, it was necessary
        for the application to explicitly send the two characters
        <code class="literal">\.</code> as a final line to indicate to the server that it had
        finished sending <code class="command">COPY</code> data.  While this still works, it is dep