1430 search results - page 40 / 286 » Query operations for moving objects database systems |
ICDE
2004
IEEE
14 years 10 months ago
2004
IEEE
We examine the problem of evaluating selection queries over imprecisely represented objects. Such objects are used either because they are much smaller in size than the precise on...
ICDT
1997
ACM
14 years 1 months ago
1997
ACM
Abstract Method invocation mechanism is one of the essential features in objectoriented programming languages. This mechanism contributes to data encapsulation and code reuse, but ...
DOOD
1995
Springer
14 years 12 days ago
1995
Springer
Abstract. A simple model for method-based authorization is defined and an algorithm is presented for testing in compile-time whether a given database schema violates authorization...
ICDE
2007
IEEE
14 years 10 months ago
2007
IEEE
Applications such as traffic management and resource scheduling for location-based services commonly need to identify regions with high concentrations of moving objects. Such quer...
ICDE
2003
IEEE
14 years 10 months ago
2003
IEEE
The long-running nature of continuous queries poses new scalability challenges for dataflow processing. CQ systems execute pipelined dataflows that may be shared across multiple q...