27756 search results - page 40 / 5552 » Process Query Systems |
ICDE
2009
IEEE
14 years 10 months ago
2009
IEEE
We have developed a system to process database queries over composed data providing web services. The queries are transformed into execution plans containing an operator that invok...
EDBTW
2006
Springer
13 years 10 months ago
2006
Springer
Abstract. Relational algebra has been a crucial foundation for relational database systems, and has played a large role in enabling their success. A corresponding XML algebra for X...
FUIN
2006
13 years 8 months ago
2006
In this paper we deal with the problem of finding an optimal query execution plan in database systems. We improve the analysis of a polynomial-time approximation algorithm due to M...
ICDE
2007
IEEE
14 years 10 months ago
2007
IEEE
Skyline query has been gaining much interest in database research communities in recent years. Most existing studies focus mainly on centralized systems, and resolving the problem...
ICDCS
2008
IEEE
14 years 3 months ago
2008
IEEE
We present a simple, yet powerful, approach for the specification and enforcement of authorizations regulating data release among data holders collaborating in a distributed comp...