26 search results - page 2 / 6 » Estimating the number of answers with guarantees for structu... |
CIKM
2006
Springer
13 years 6 months ago
2006
Springer
Peer Data Management Systems (PDMS) are a natural extension of heterogeneous database systems. One of the main tasks in such systems is efficient query processing. Insisting on co...
WWW
2004
ACM
14 years 5 months ago
2004
ACM
Centralized Resource Description Framework (RDF) repositories have limitations both in their failure tolerance and in their scalability. Existing Peer-to-Peer (P2P) RDF repositori...
EDBT
2002
ACM
14 years 5 months ago
2002
ACM
Abstract. Estimating the sizes of query results, and intermediate results, is crucial to many aspects of query processing. In particular, it is necessary for effective query optimi...
DASFAA
2004
IEEE
13 years 8 months ago
2004
IEEE
Abstract. We consider the problem of accurately estimating the number of approximate XML answers for a given query, and propose an efficient method that (1) accurately computes sel...
VLDB
2012
ACM
12 years 14 days ago
2012
ACM
In the last decade, spatio-temporal database research focuses on the design of effective and efficient indexing structures in support of location-based queries such as predictive...