712 search results - page 57 / 143 » Decoupled Query Optimization for Federated Database Systems |
131
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ASPLOS
2004
ACM
15 years 8 months ago
2004
ACM
This paper describes the design, implementation, and evaluation of a Federated Array of Bricks (FAB), a distributed disk array that provides the reliability of traditional enterpr...
123
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APWEB
2004
Springer
15 years 8 months ago
2004
Springer
Queries to data warehouses often involve hundreds of complex aggregations over large volumes of data, and so it is infeasible to compute these queries by scanning the data sources ...
140
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VLDB
2002
ACM
15 years 2 months ago
2002
ACM
Accurate prediction of operator execution time is a prerequisite for database query optimization. Although extensively studied for conventional disk-based DBMSs, cost modeling in ...
112
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DEXAW
2009
IEEE
15 years 9 months ago
2009
IEEE
—In this paper RDFStats is introduced, which is a generator for statistics of RDF sources like SPARQL endpoints and RDF documents. RDFStats does not only provide a statistics gen...
134
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AMW
2009
15 years 4 months ago
2009
Conventional operators for data retrieval are either based on exact matching or on total order relationship among elements. Neither of them is appropriate to manage complex data, s...