class="parameter"><code>plan</code></em></code></span></dt><dd><p>
      prepared statement (returned by <code class="function">SPI_prepare</code>)
     </p></dd><dt><span class="term"><code class="literal">ParamListInfo <em class="parameter"><code>params</code></em></code></span></dt><dd><p>
      data structure containing parameter types and values; NULL if none
     </p></dd><dt><span class="term"><code class="literal">bool <em class="parameter"><code>read_only</code></em></code></span></dt><dd><p><code 