@Override
  public void process(Object row, int tag) throws HiveException {
    super.process(row, tag);
    forward(result.o, outputObjInspector);
  }
Unlike the MR counterpoint, on Tez we want processOp to forward
the records.
ql/src/java/org/apache/hadoop/hive/ql/exec/TezDummyStoreOperator.java