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» Unnesting Arbitrary Queries
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ISCI
2007
115views more  ISCI 2007»
13 years 10 months ago
Compressed histograms with arbitrary bucket layouts for selectivity estimation
Selectivity estimation is an important step of query optimization in a database management system, and multidimensional histogram techniques have proved promising for selectivity ...
Dennis Fuchs, Zhen He, Byung Suk Lee
ESWS
2007
Springer
14 years 4 months ago
Extensible SPARQL Functions with Embedded Javascript
Abstract. The SPARQL Query Language allows filtering of query results through arbitrary predicate expressions. Such expressions may invoke custom functions identified with IRIs, ...
Greg Williams
JACM
2010
135views more  JACM 2010»
13 years 8 months ago
A dynamic data structure for 3-D convex hulls and 2-D nearest neighbor queries
We present a fully dynamic randomized data structure that can answer queries about the convex hull of a set of n points in three dimensions, where insertions take O(log3 n) expect...
Timothy M. Chan
ICDE
1999
IEEE
111views Database» more  ICDE 1999»
14 years 11 months ago
Storage of Multidimensional Arrays Based on Arbitrary Tiling
Storage management of multidimensional arrays aims at supporting the array model needed by applications and insuring fast execution of access operations. Current approaches to sto...
Paula Furtado, Peter Baumann
ESWA
2002
73views more  ESWA 2002»
13 years 9 months ago
Domain-dependent information gathering agent
A universal agent should be capable of gathering information from arbitrary heterogeneous sites and offer intelligent information services on its own based on information so gathe...
Aleksander Pivk, Matjaz Gams