 class="application">libpq</span>.
   The functions described in this section allow applications to take
   advantage of this capability by supplying or consuming copied data.
  </p><p>
   The overall process is that the application first issues the SQL
   <code class="command">COPY</code> command via <a class="xref" href="libpq-exec.html#LIBPQ-PQEXEC"><code class="function">PQexec</code></a> or one
   of the equivalent functions.  The response to this (if there is no
   error in the command) will be a <cod