uld get in each fetch operation. It can be specified for a foreign
       table or a foreign server. The option specified on a table overrides
       an option specified for the server.
       The default is <code class="literal">100</code>.
      </p></dd><dt><span class="term"><code class="literal">batch_size</code> (<code class="type">integer</code>)</span></dt><dd><p>
       This option specifies the number of rows <code class="filename">postgres_fdw</code>
       should insert in each insert operation.