ioned table,
       the partition keys must not include any expressions or function calls
       and the constraint's columns must include all of the partition key
       columns.  This limitation exists because the individual indexes making
       up the constraint can only directly enforce uniqueness within their own
       partitions; therefore, the partition structure itself must guarantee
       that there are not duplicates in different partitions.
      </p></li><li class="listitem"><p>
       There 