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In-memory Incremental Maintenance of Provenance Sketches [extended version]
Pengyuan Li, Boris Glavic, Dieter Gawlick +4
Provenance-based data skipping compactly over-approximates the provenance of a query using so-called provenance sketches and utilizes such sketches to speed-up the execution of sub…
Provenance-based Data Skipping (TechReport)
Xing Niu, Ziyu Liu, Pengyuan Li +1
Database systems analyze queries to determine upfront which data is needed for answering them and use indexes and other physical design techniques to speed-up access to that data.…
Snapshot Semantics for Temporal Multiset Relations (Extended Version)
Anton Dignös, Boris Glavic, Xing Niu +2
Snapshot semantics is widely used for evaluating queries over temporal data: temporal relations are seen as sequences of snapshot relations, and queries are evaluated at each snaps…
Heuristic and Cost-based Optimization for Diverse Provenance Tasks
Xing Niu, Raghav Kapoor, Boris Glavic +4
A well-established technique for capturing database provenance as annotations on data is to instrument queries to propagate such annotations. However, even sophisticated query opti…
Debugging Transactions and Tracking their Provenance with Reenactment
Xing Niu, Bahareh Sadat Arab, Seokki Lee +6
Debugging transactions and understanding their execution are of immense importance for developing OLAP applications, to trace causes of errors in production systems, and to audit t…