protected ModifiedStatus isPageModified(PageElement pageElement) {
    long startTime = pageElement.getStartTime();
    long endTime = pageElement.getEndTime();
    return checkIsModified(
        startTime,
        endTime,
        pageElement.getChunkMetadataElement().chunkMetadata.getDeleteIntervalList());
  }
NONE_DELETED means that no data on this page has been deleted. <br>
PARTIAL_DELETED means that there is data on this page been deleted. <br>
ALL_DELETED means that all data on this page has been deleted.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/execute/utils/executor/fast/FastNonAlignedSeriesCompactionExecutor.java