code: Integer getBRIScope() {
          return (table.isWritable()) ? ValuePool.getInt(bestRowTemporary)
                                      : ValuePool.getInt(bestRowSession);
      }
docs: Retrieves the scope of the best row identifier. <p>
  
  This implements the rules described in
  DatabaseInformationMain.SYSTEM_BESTROWIDENTIFIER. <p>
  
  @return the scope of the best row identifier