ColumnIndex.Builder columnIndexer = new ColumnIndex.Builder(cf, key.getKey(), dataFile.stream);
if (cf.deletionInfo().getTopLevelDeletion().localDeletionTime < Integer.MAX_VALUE)
tombstones.update(cf.deletionInfo().getTopLevelDeletion().localDeletionTime);
Iterator<RangeTombstone> rangeTombstoneIterator = cf.deletionInfo().rangeIterator();
while (rangeTombstoneIterator.hasNext())
{
RangeTombstone rangeTombstone = rangeTombstoneIterator.next();
tombstones.update(rangeTombstone.getLocalDeletionTime());
minTimestamp = Math.min(minTimestamp, rangeTombstone.timestamp());