private void iterateNoNullsWithAggregationSelection(
    VectorAggregationBufferRow[] aggregationBufferSets,
    int aggregateIndex,
    long[] values,
    int batchSize) {
    for (int i=0; i < batchSize; ++i) {
      Aggregation myagg = getCurrentAggregationBuffer(
          aggregationBufferSets, 
          aggregateIndex,
          i);
      myagg.value += values[i];
    }
  }
class for storing the current aggregate value.
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/expressions/aggregates/VectorUDAFCountMerge.java