Databases4 min read
Database Engineering
Alibaba's Panda Index gives InnoDB unique keys a version history they never had
Panda Index pushes the clustered index's versioning down into unique-key records, adding transaction columns and an independent undo chain. The result is one record lock instead of several gap locks, and index-only reads that never touch the clustered index. Independent benchmarks are still missing.
2026-08-06