public UnfilteredRowIterator next() { Map.Entry<PartitionPosition, AtomicBTreePartition> entry = iter.next(); // Actual stored key should be true DecoratedKey assert entry.getKey() instanceof DecoratedKey; DecoratedKey key = (DecoratedKey) entry.getKey(); ClusteringIndexFilter filter = dataRange.clusteringIndexFilter(key); return filter.getUnfilteredRowIterator(columnFilter, entry.getValue()); }