public void setHLLSparseRegister(int[] reg) {
    for (int i : reg) {
      int key = i >>> HLLConstants.Q_PRIME_VALUE;
      byte value = (byte) (i & 0x3f);
      sparseRegister.set(key, value);
    }
  }
Reconstruct sparse map from serialized integer list
@param reg
         - uncompressed and delta decoded integer list
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/common/ndv/hll/HyperLogLog.java