712 search results - page 36 / 143 » Decoupled Query Optimization for Federated Database Systems |
140
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SCCC
2005
IEEE
15 years 7 months ago
2005
IEEE
Databases may not satisfy integrity constraints (ICs) for several reasons. Nevertheless, in most of the cases an important part of the data is still consistent wrt certain desired...
130
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SIGMOD
2003
ACM
16 years 2 months ago
2003
ACM
Modern database systems provide not only powerful data models but also complex query languages supporting powerful features such as the ability to create new database objects and ...
134
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ICDE
2005
IEEE
15 years 7 months ago
2005
IEEE
¡ Several systems have recently been proposed for the evaluation of XPath expressions. However, none of these systems have demonstrated both scalability with large document sizes ...
121
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ICDE
2005
IEEE
15 years 7 months ago
2005
IEEE
Abstract— Distributed stream-based applications, such as continuous query systems, have network scale and time characteristics that challenge traditional distributed query optimi...
123
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COOPIS
2004
IEEE
15 years 5 months ago
2004
IEEE
Abstract. We consider the use of a cluster system for managing autonomous databases. In order to improve the performance of read-only queries, we strive to exploit user requirement...