{"id":"lsm-forward-only-iteration","text":"SSTable iterators (`scan`, `scan_all`) support only forward iteration; there is no `Prev()` or reverse scan capability, preventing `ORDER BY DESC` or backward cursor pagination","truth_value":"IN","source":"entries/2026/05/29/topic-leveldb-merging-iterator.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"lsm-forward-only-iteration","truth_value":"IN","reason":"premise"}]}}