Titlebook: Database Systems for Advanced Applications; 19th International C Sourav S. Bhowmick,Curtis E. Dyreson,Bernhard Thal Conference proceedings

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Privacy-Preserving Reachability Query Services is becoming economically appealing to outsource graph data to a third-party service provider (.), to provide query services. However, . cannot always be trusted. Hence, data owners and query clients may prefer not to expose their data graphs and queries. This paper studies privacy-preserving query

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SKY R-tree: An Index Structure for Distance-Based Top-k Query, a top-k query may be issued by taking into account both the location information and non-spatial attributes. This paper focuses on a distance-based top-k query which retrieves the best objects based on distance from candidate objects to a query point as well as other non-spatial attributes. In thi

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Efficient Processing of Which-Edge Questions on Shortest Path Queriesthe total distance for a given set of shortest path queries on a graph. This problem has important applications in logistics, urban planning, and network planning. We show the NP-hardness of the problem, as well as present efficient algorithms that compute highly accurate results in practice. Experi

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Qualitätsmanagement in Beratungsunternehmenlable search space. In particular, SAQR utilizes both similarity-based and cardinality-based pruning techniques to bound the search space and quickly find a refined query that meets the user expectations. Our experimental evaluation shows the scalability exhibited by SAQR under various workload sett