public void evaluateStreamingGroupBatch(VectorizedRowBatch batch, boolean isLastGroupBatch)
      throws HiveException {

    // Streaming evaluators fill in their results during the evaluate call.
    for (VectorPTFEvaluatorBase evaluator : evaluators) {
      evaluator.evaluateGroupBatch(batch);
      if (isLastGroupBatch) {
        evaluator.doLastBatchWork();
      }
    }
  }
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