code> query,
   <code class="filename">postgres_fdw</code> attempts to optimize the query execution by
   sending the whole query to the remote server if there are no query
   <code class="literal">WHERE</code> clauses that cannot be sent to the remote server,
   no local joins for the query, no row-level local <code class="literal">BEFORE</code> or
   <code class="literal">AFTER</code> triggers or stored generated columns on the target
   table, and no <code class="literal">CHECK OPTION</code> constraints 