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Creators/Authors contains: "Porobic, Danica"

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  1. ; ; ; ; ; ; (, OpenProceedings.org)
  2. ; ; ; ; ; ; ; (, Proceedings of the VLDB Endowment)
    Database systems use static analysis to determine upfront which data is needed for answering a query and use indexes and other physical design techniques to speed-up access to that data. However, for important classes of queries, e.g., HAVING and top-k queries, it is impossible to determine up-front what data is relevant. To overcome this limitation, we develop provenance-based data skipping (PBDS), a novel approach that generates provenance sketches to concisely encode what data is relevant for a query. Once a provenance sketch has been captured it is used to speed up subsequent queries. PBDS can exploit physical design artifacts such as indexes and zone maps. 
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