a-qualify all names in such
   functions, or else attach <code class="literal">SET search_path</code> options
   (see <a class="xref" href="sql-createfunction.html" title="CREATE FUNCTION"><span class="refentrytitle">CREATE FUNCTION</span></a>) to such functions
   to establish their expected search path environment.
  </p><p>
   <code class="filename">postgres_fdw</code> likewise establishes remote session settings
   for various parameters:
   </p><div class="itemizedlist"><ul class="itemizedlist compact"