2228 search results - page 149 / 446 » A System for Semantic Query Optimization |
74
Voted
JCS
2008
14 years 9 months ago
2008
Controlled Query Evaluation (CQE) defines a logical framework to protect confidential information in a database. By modeling a user's a priori knowledge appropriately, a CQE ...
VLDB
2005
ACM
15 years 3 months ago
2005
ACM
Query optimizers in current database systems are designed to pick a single efficient plan for a given query based on current statistical properties of the data. However, different...
MDM
2005
Springer
15 years 3 months ago
2005
Springer
In this paper we propose a query-driven approach for tuning the time/energy trade-off in sensor networks with mobile sensors. The tuning factors include re-positioning of mobile s...
81
Voted
FUIN
2006
14 years 10 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...
CIKM
2006
Springer
15 years 1 months ago
2006
Springer
Monitoring systems today often involve continuous queries over streaming data, in a distributed collaborative system. The distribution of query operators over a network of process...