565 search results - page 71 / 113 » Multiple Range Query Optimization in Spatial Databases |
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ICDE
1997
IEEE
15 years 11 months ago
1997
IEEE
We propose a data model and a few algebraic operations that provide semantic foundation to multidimensional databases. The distinguishing feature of the proposed model is the symm...
93
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SIGMOD
2004
ACM
15 years 9 months ago
2004
ACM
We present new algorithms on commodity graphics processors to perform fast computation of several common database operations. Specifically, we consider operations such as conjunct...
WWW
2008
ACM
15 years 10 months ago
2008
ACM
In this paper, we formalize the problem of Basic Graph Pattern (BGP) optimization for SPARQL queries and main memory graph implementations of RDF data. We define and analyze the c...
VLDB
1999
ACM
15 years 1 months ago
1999
ACM
An important issue for federated systems of diverse data sources is optimizing cross-source queries, without building knowledge of individual sources into the optimizer. This pape...
EDBT
2006
ACM
15 years 9 months ago
2006
ACM
Given a set of N multi-dimensional points, we study the computation of -quantiles according to a ranking function F, which is provided by the user at runtime. Specifically, F compu...