protected Range newRange(int end, int end2, PTFPartition partition) {
    return new Range(end, end2, partition, (parameters == null || parameters.isEmpty()));
  }
When there are no parameters specified, partition iterator can be made faster;
In such cases, it need not materialize the ROW from RowContainer. This saves lots of IO.
ql/src/java/org/apache/hadoop/hive/ql/udf/ptf/BasePartitionEvaluator.java