@Override
  public void shallowCopyTo(ColumnVector otherCv) {
    IntervalDayTimeColumnVector other = (IntervalDayTimeColumnVector)otherCv;
    super.shallowCopyTo(other);
    other.totalSeconds = totalSeconds;
    other.nanos = nanos;
  }
Set the convenience writable object stored by this column vector
@param scratchWritable
storage-api/src/java/org/apache/hadoop/hive/ql/exec/vector/IntervalDayTimeColumnVector.java