1168 search results - page 26 / 234 » Optimization strategies for complex queries |
PPDP
2010
Springer
13 years 8 months ago
2010
Springer
Given a set of Datalog rules, facts, and a query, answers to the query can be inferred bottom-up starting with the facts or top-down starting with the query. For efficiently answe...
ICIP
2009
IEEE
13 years 8 months ago
2009
IEEE
Active learning is a framework that has attracted a lot of research interest in the content-based image retrieval (CBIR) in recent years. To be effective, an active learning syste...
ICDT
1999
ACM
14 years 2 months ago
1999
ACM
In data integration systems, queries posed to a mediator need to be translated into a sequence of queries to the underlying data sources. In a heterogeneous environment, with sour...
CORR
2012
Springer
12 years 6 months ago
2012
Springer
We propose a novel mechanism for answering sets of counting queries under differential privacy. Given a workload of counting queries, the mechanism automatically selects a differ...
PODS
2010
ACM
14 years 3 months ago
2010
ACM
Both semantic and type-based query optimization rely on the idea that queries often exhibit non-trivial rewritings if the state space of the database is restricted. Despite their ...