{"id":"heap-tiebreak-uses-source-index","text":"The merge heap tuple includes a `source_index` field solely to prevent Python from comparing `SSTableEntry` objects when `(key, -timestamp)` ties, which would raise `TypeError`.","truth_value":"IN","source":"entries/2026/05/28/sstable-and-compaction-sstable-merge_sstables.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"heap-tiebreak-uses-source-index","truth_value":"IN","reason":"premise"}]}}