public void clear() {
    rowCount = 0;
    seqRowCount = 0;
    sorted = true;
    maxTime = Long.MIN_VALUE;
    minTime = Long.MAX_VALUE;
    queryContextSet.clear();
    ownerQuery = null;
    clearTime();
    clearValue();
    clearIndices();
    clearBitMap();
  }
Get whether value is null at the given position in TvList.

@param unsortedRowIndex value index
@return boolean
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/utils/datastructure/TVList.java