private void iterateNoSelectionNoNulls(
      Aggregation myagg, 
      long[] vector, 
      int batchSize) {

    for (int i=0;i<batchSize;++i) {
      myagg.value += vector[i];
    }
  }
class for storing the current aggregate value.
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/expressions/aggregates/VectorUDAFCountMerge.java