private void unpackAllOverlappedChunkMetadataToPageReaders(long endpointTime, boolean init)
      throws IOException {
    if (firstChunkMetadata != null
        && orderUtils.isOverlapped(endpointTime, firstChunkMetadata.getStatistics())) {
      unpackOneChunkMetaData(firstChunkMetadata);
      firstChunkMetadata = null;
    }
    // In case unpacking too many sequence chunks
    boolean hasMeetSeq = false;
    while (!cachedChunkMetadata.isEmpty()
        && orderUtils.isOverlapped(endpointTime, cachedChunkMetadata.peek().getStatistics())) {
      if (cachedChunkMetadata.peek().isSeq() && hasMeetSeq) {
        break;
      } else if (cachedChunkMetadata.peek().isSeq()) {
        hasMeetSeq = true;
      }
      unpackOneChunkMetaData(cachedChunkMetadata.poll());
    }
    if (init
        && firstPageReader == null
        && (!seqPageReaders.isEmpty() || !unSeqPageReaders.isEmpty())) {
      initFirstPageReader();
    }
  }
This method should be called after hasNextChunk() until no next page, make sure that all
overlapped pages are consumed
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/execution/operator/source/SeriesScanUtil.java