297 search results - page 18 / 60 » On the Decidability of Consistent Query Answering |
GVD
2004
13 years 9 months ago
2004
Abstract. Checking the consistency of query conditions is an old problem, and there are already many proposed solutions. Since the problem is in general undecidable, there is not a...
ICDE
2008
IEEE
14 years 9 months ago
2008
IEEE
The typical workload in a database system consists of a mixture of multiple queries of different types, running concurrently and interacting with each other. Hence, optimizing perf...
DAGSTUHL
2007
13 years 10 months ago
2007
Abstract. Moving objects produce trajectories, which are stored in databases by means of finite samples of time-stamped locations. When also speed limitations in these sample poin...
ASP
2003
Springer
14 years 1 months ago
2003
Springer
Integration of data is required when accessing multiple databases within an organization or on the WWW. Schema integration is required for database interoperability, but it is curr...
SDMW
2007
Springer
14 years 2 months ago
2007
Springer
Abstract. We investigate the experimental effectiveness of query rewriting over XML security views. Our model consists of access control policies specified over DTDs with XPath e...