Sciweavers

1500 search results - page 132 / 300
» Query Optimization in Database Grid
Sort
View
ICDE
2005
IEEE
123views Database» more  ICDE 2005»
14 years 2 months ago
Load and Network Aware Query Routing for Information Integration
Current federated systems deploy cost-based query optimization mechanisms; i.e., the optimizer selects a global query plan with the lowest cost to execute. Thus, cost functions in...
Wen-Syan Li, Vishal S. Batra, Vijayshankar Raman, ...
ICDE
2009
IEEE
129views Database» more  ICDE 2009»
14 years 10 months ago
Evaluating TOP-K Queries over Business Processes
A Business Process (BP) consists of some business activities undertaken by one or more organizations in pursuit of some business goal. Tools for querying and analyzing BP specifica...
Daniel Deutch, Tova Milo
EDBT
2004
ACM
155views Database» more  EDBT 2004»
14 years 9 months ago
Processing Unions of Conjunctive Queries with Negation under Limited Access Patterns
We study the problem of answering queries over sources with limited access patterns. The problem is to decide whether a given query Q is feasible, i.e., equivalent to an executable...
Alan Nash, Bertram Ludäscher
EDBT
2006
ACM
191views Database» more  EDBT 2006»
14 years 9 months ago
Parallelizing Skyline Queries for Scalable Distribution
Skyline queries help users make intelligent decisions over complex data, where different and often conflicting criteria are considered. Current skyline computation methods are rest...
Ping Wu, Caijie Zhang, Ying Feng, Ben Y. Zhao, Div...
VLDB
2005
ACM
129views Database» more  VLDB 2005»
14 years 2 months ago
Sketching Streams Through the Net: Distributed Approximate Query Tracking
Emerging large-scale monitoring applications require continuous tracking of complex dataanalysis queries over collections of physicallydistributed streams. Effective solutions hav...
Graham Cormode, Minos N. Garofalakis