5166 search results - page 634 / 1034 » Web Query Optimizer |
177
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COMPGEOM
2006
ACM
16 years 15 days ago
2006
ACM
This paper examines the computation of the Voronoi diagram of a set of ellipses in the Euclidean plane. We propose the first complete algorithms, under the exact computation para...
154
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VLDB
2004
ACM
15 years 12 months ago
2004
ACM
When query optimizers erroneously assume that database columns are statistically independent, they can underestimate the selectivities of conjunctive predicates by orders of magni...
204
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BNCOD
2007
15 years 8 months ago
2007
Order is essential for XML query processing. Efficient XML processing with order consideration over relational storage is non-trivial, especially for complex nested XQuery expressi...
189
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SIGMOD
2010
ACM
15 years 6 months ago
2010
ACM
Histograms have been widely used for fast estimation of query result sizes in query optimization. In this paper, we propose a new histogram method, called the Skew-Tolerant Histog...
207
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EDBT
2009
ACM
15 years 4 months ago
2009
ACM
In this work, we focus on managing scientific environmental data, which are measurement readings collected from wireless sensors. In environmental science applications, raw sensor...