1160 search results - page 109 / 232 » Query Processing and Optimization for Pictorial Query Trees |
113
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VLDB
1999
ACM
15 years 5 months ago
1999
ACM
We present an optimization method and algorithm designed for three objectives: physical data independence, semantic optimization, and generalized tableau minimization. The method ...
110
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EDBT
2006
ACM
16 years 1 months ago
2006
ACM
Abstract. Many different index structures have been proposed for spatial databases to support efficient query processing. However, most of these index structures suffer from an exp...
119
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SIGMOD
2009
ACM
15 years 6 months ago
2009
ACM
It has recently been asserted that the usability of a database is as important as its capability. Understanding the database schema, the hidden relationships among attributes in t...
111
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PODS
2006
ACM
16 years 1 months ago
2006
ACM
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...
134
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CIKM
2006
Springer
15 years 5 months ago
2006
Springer
In an uncertain database, each data item is modeled as a range associated with a probability density function. Previous works for this kind of data have focussed on simple queries...