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IJSWIS
2008
135views more  IJSWIS 2008»
14 years 10 months ago
Efficient Processing of RDF Queries with Nested Optional Graph Patterns in an RDBMS
Relational technology has shown to be very useful for scalable Semantic Web data management. Numerous researchers have proposed to use RDBMSs to store and query voluminous RDF dat...
Artem Chebotko, Shiyong Lu, Mustafa Atay, Farshad ...
ISI
2008
Springer
14 years 10 months ago
Towards service-oriented continuous queries in pervasive systems
Pervasive information systems give an overview of what digital environments should look like in the future. From a data-centric point of view, traditional databases have to be used...
Yann Gripay, Frédérique Laforest, Je...
PVLDB
2010
111views more  PVLDB 2010»
14 years 4 months ago
PolicyReplay: Misconfiguration-Response Queries for Data Breach Reporting
Recent legislation has increased the requirements of organizations to report data breaches, or unauthorized access to data. While access control policies are used to restrict acce...
Daniel Fabbri, Kristen LeFevre, Qiang Zhu
ICDE
2007
IEEE
113views Database» more  ICDE 2007»
15 years 11 months ago
Reducing Order Enforcement Cost in Complex Query Plans
Algorithms that exploit sort orders are widely used to implement joins, grouping, duplicate elimination and other set operations. Query optimizers traditionally deal with sort ord...
Ravindra Guravannavar, S. Sudarshan
ICDE
2010
IEEE
250views Database» more  ICDE 2010»
15 years 7 months ago
Optimized Query Evaluation Using Cooperative Sorts
— Many applications require sorting a table over multiple sort orders: generation of multiple reports from a table, evaluation of a complex query that involves multiple instances...
Yu Cao, Ramadhana Bramandia, Chee-Yong Chan, Kian-...