5166 search results - page 193 / 1034 » Web Query Optimizer |
160
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AAAI
2008
15 years 8 months ago
2008
Answering conjunctive queries (CQs) has been recognized as a key task for the usage of Description Logics (DLs) in a number of applications, and has thus been studied by many auth...
192
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SIAMCOMP
2012
13 years 8 months ago
2012
Let S be a set of n intervals in R, and let (S, +) be any commutative semigroup. We assign a weight ω(s) ∈ S to each interval in S. For a point x ∈ R, let S(x) ⊆ S be the se...
173
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EDBT
2011
ACM
14 years 9 months ago
2011
ACM
Continuous top-k queries, which report a certain number (k) of top preferred objects from data streams, are important for a broad class of real-time applications, ranging from fi...
181
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VLDB
2005
ACM
15 years 11 months ago
2005
ACM
Nested iteration is an important technique for query evaluation. It is the default way of executing nested subqueries in SQL. Although decorrelation often results in cheaper non-n...