651 search results - page 6 / 131 » Algebraic Query Optimization for Distributed Top-k Queries |
SYRCODIS
2007
13 years 8 months ago
2007
Several requirements for algebra suitable for e cient cost-based optimization are presented. It is shown that known XML algebras do not fully satisfy this requirements. A new alge...
MDM
2005
Springer
14 years 1 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...
SIGMOD
2007
ACM
14 years 7 months ago
2007
ACM
An emerging challenge in modern distributed querying is to efficiently process multiple continuous aggregation queries simultaneously. Processing each query independently may be i...
ICDE
2003
IEEE
14 years 9 months ago
2003
IEEE
XKeyword provides efficient keyword proximity queries on large XML graph databases. A query is simply a list of keywords and does not require any schema or query language knowledg...
HPCC
2005
Springer
14 years 1 months ago
2005
Springer
Abstract. We consider query execution strategies for object-oriented distributed databases. There are several scenarios of query decomposition, assuming that the corresponding quer...