287 search results - page 27 / 58 » Optimization Techniques for Queries with Expensive Methods |
145
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SODA
2008
ACM
15 years 1 months ago
2008
ACM
We address the extension of the binary search technique from sorted arrays and totally ordered sets to trees and tree-like partially ordered sets. As in the sorted array case, the...
107
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FOCM
2002
15 years 7 days ago
2002
This paper is concerned with the design and analysis of adaptive wavelet methods for systems of operator equations. Its main accomplishment is to extend the range of applicability...
92
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ISMIS
1999
Springer
15 years 4 months ago
1999
Springer
Semantic Query Optimisation makes use of the semantic knowledge of a database (rules) to perform query transformation. Rules are normally learned from former queries fired by the u...
224
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ICDE
2009
IEEE
16 years 2 months ago
2009
IEEE
A common approach to performing keyword search over relational databases is to find the minimum Steiner trees in database graphs. These methods, however, are rather expensive as th...
200
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SIGMOD
2006
ACM
16 years 18 days ago
2006
ACM
Given a dataset P and a preference function f, a top-k query retrieves the k tuples in P with the highest scores according to f. Even though the problem is well-studied in convent...