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cs.DB2026
Extending Elle for Transaction Workloads with Duplicate Values
Zhiheng Cai, Si Liu, Hengfeng Wei +1
Elle is one of the most widely adopted black-box isolation validators. It crucially relies on the unique-value assumption for sound and efficient isolation validation. Yet, transac…
cs.DB2026
Semantic Conformance of Concurrency Control Protocols under Mixed Isolation Levels
Qiuhuan Xiong, Hengfeng Wei, Si Liu +2
Modern database systems widely support per-transaction isolation levels as a practical means of balancing consistency guarantees and performance. Yet, it remains largely unclear wh…
cs.DB2026
Efficient Query Rewrite Rule Discovery via Standardized Enumeration and Learning-to-Rank(extend)
Yuan Zhang, Yuxing Chen, Yuekun Yu +5
Query rewriting is essential for database performance optimization, but existing automated rule enumeration methods suffer from exponential search spaces, severe redundancy, and po…