statement (returned by <code class="function">SPI_prepare</code>)
     </p></dd></dl></div></div><div class="refsect1" id="id-1.8.12.8.14.7"><h2>Return Value</h2><p>
    <code class="symbol">true</code> or <code class="symbol">false</code> to indicate if the
    <em class="parameter"><code>plan</code></em> can produce a cursor or not, with
    <code class="varname">SPI_result</code> set to zero.
    If it is not possible to determine the answer (for example,
    if the <em class="parameter"><code>plan</code