@Override
  public void setNextVectorBatchGroupStatus(boolean isLastGroupBatch) throws HiveException {
    this.isLastGroupBatch = isLastGroupBatch;
  }
Setup the vectorized row batch description of the output of the native vectorized PTF
operator.  Use the output projection we previously built from a mixture of input
columns and new scratch columns.
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/ptf/VectorPTFOperator.java