 by future queries using a foreign table.
  </p><p>
   Once a connection to a foreign server has been established,
   it's by default kept until the local or corresponding remote
   session exits.  To disconnect a connection explicitly,
   <code class="literal">keep_connections</code> option for a foreign server
   may be disabled, or
   <code class="function">postgres_fdw_disconnect</code> and
   <code class="function">postgres_fdw_disconnect_all</code> functions
   may be used.  For example, these are use