private void forwardBufferedBatch(VectorPTFOperator vecPTFOperator,
      BufferedVectorizedRowBatch bufferedBatch, Object[] partitionKey) throws HiveException {
    prepareBufferedBatchForForwarding(bufferedBatch, partitionKey);
    vecPTFOperator.forwardBatch(overflowBatch);
  }
Returns the values of ordering columns from a given batch and given row in an Object[].
@param vectorizedRowBatch
@param rowIndexInBatch
@return
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/ptf/VectorPTFGroupBatches.java