is no way to create an exclusion constraint spanning the
       whole partitioned table.  It is only possible to put such a
       constraint on each leaf partition individually.  Again, this
       limitation stems from not being able to enforce cross-partition
       restrictions.
      </p></li><li class="listitem"><p>
       <code class="literal">BEFORE ROW</code> triggers on <code class="literal">INSERT</code>
       cannot change which partition is the final destination for a new row.
      </p></li><