public void intervalDayTimeUpdate(HiveIntervalDayTime intervalDayTime, int elementNum) {
    intervalDayTime.set(totalSeconds[elementNum], nanos[elementNum]);
  }
Set a HiveIntervalDayTime object from a row of the column.
We assume the entry has already been NULL checked and isRepeated adjusted.
@param intervalDayTime
@param elementNum
storage-api/src/java/org/apache/hadoop/hive/ql/exec/vector/IntervalDayTimeColumnVector.java