429 search results - page 17 / 86 » A SAT approach to query optimization in mediator systems |
KDD
1994
ACM
14 years 21 days ago
1994
ACM
Semantic query optimization can dramatically speed up database query answering by knowledge intensive reformulation. But the problem of how to learn required semantic rules has no...
ICMCS
2005
IEEE
14 years 2 months ago
2005
IEEE
This paper introduces a new approach of approximating the selectivity of multimedia range queries. Estimating the selectivity of a range query is a pre-requisite to optimize a mul...
ATAL
2007
Springer
14 years 2 months ago
2007
Springer
A MAS architecture consisting of service centers is proposed. Within each service center, a mediator coordinates service delivery by allocating individual tasks to corresponding t...
GCC
2005
Springer
14 years 2 months ago
2005
Springer
DarGridâ…ˇ is an implemented database gird system whose goal is to provide a semantic solution for integrating database resources on the web. Although many algorithms have been pro...
ICEIS
2006
IEEE
14 years 2 months ago
2006
IEEE
The satisfiability test checks, whether or not the evaluation of a query returns the empty set for any input document, and can be used in query optimization for avoiding the submis...