136 search results - page 12 / 28 » Optimization and Dataflow Algorithms for Nested Tree Queries |
169
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GIS
2005
ACM
15 years 10 months ago
2005
ACM
Group nearest neighbor (GNN) queries are a relatively new type of operations in spatial database applications. Different from a traditional kNN query which specifies a single quer...
107
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WISE
2007
Springer
15 years 3 months ago
2007
Springer
We study and present our findings on two closely related problems on xpath rewriting using views when both the view and the query are tree patterns involving /,// and []. First, g...
EDBT
2010
ACM
15 years 4 months ago
2010
ACM
Skyline queries have gained a lot of attention for multicriteria analysis in large-scale datasets. While existing skyline algorithms have focused mostly on exploiting data dominan...
164
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ICDE
2005
IEEE
15 years 11 months ago
2005
IEEE
Sequence-based XML indexing aims at avoiding expensive join operations in query processing. It transforms structured XML data into sequences so that a structured query can be answ...
92
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VLDB
1989
ACM
15 years 1 months ago
1989
ACM
This paper presents a parallel algorithm for recursive query processing and shows how it can be efficiently implemented in a local computer network. The algorithm relies on an int...