Iterator<RangeTombstone> rangeTombstoneIterator = cf.deletionInfo().rangeIterator();
while (rangeTombstoneIterator.hasNext())
{
RangeTombstone rangeTombstone = rangeTombstoneIterator.next();
tombstones.update(rangeTombstone.getLocalDeletionTime());
minTimestamp = Math.min(minTimestamp, rangeTombstone.timestamp());
maxTimestamp = Math.max(maxTimestamp, rangeTombstone.timestamp());
minColumnNames = ColumnNameHelper.minComponents(minColumnNames, rangeTombstone.min, metadata.comparator);
maxColumnNames = ColumnNameHelper.maxComponents(maxColumnNames, rangeTombstone.max, metadata.comparator);
}