@Override
    protected void processValue(Aggregation myagg, ColumnVector columnVector, int i) {
      DecimalColumnVector inputColumn = (DecimalColumnVector) columnVector;
      int startIdx = inputColumn.vector[i].toBytes(scratchBuffer);
      myagg.bf.addBytes(scratchBuffer, startIdx, scratchBuffer.length - startIdx);
    }
class for storing the current aggregate value.
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/expressions/aggregates/VectorUDAFBloomFilter.java