public int deleteTime(long lowerBound, long upperBound) {
    delete(lowerBound, upperBound);
    int prevDeletedCnt = this.timeDeletedCnt;
    for (int i = 0; i < rowCount; i++) {
      long time = getTime(i);
      if (time >= lowerBound && time <= upperBound) {
        markRowNull(i);
      }
    }
    boolean needUpdateMaxTime = lowerBound <= maxTime && maxTime <= upperBound;
    if (needUpdateMaxTime) {
      updateMaxTime();
    }
    boolean needUpdateMinTime = lowerBound <= minTime && minTime <= upperBound;
    if (needUpdateMinTime) {
      updateMinTime();
    }
    return timeDeletedCnt - prevDeletedCnt;
  }
Get whether value is null at the given position in AlignedTvList.

@param unsortedRowIndex value index inside this column
@param columnIndex index of the column
@return boolean
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/utils/datastructure/AlignedTVList.java