Sciweavers

SAC
2011
ACM
12 years 6 months ago
Secure shared continuous query processing
Data stream management systems (DSMSs) process continuous queries over streaming data in real-time adhering to quality of service requirements. The data streams generated from sen...
Raman Adaikkalavan, Thomas Perez
EDBT
1998
ACM
130views Database» more  EDBT 1998»
13 years 7 months ago
Fusion Queries over Internet Databases
Abstract. Fusion queries search for information integrated from distributed, autonomous sources over the Internet. We investigate techniques for e cient processing of fusion querie...
Ramana Yerneni, Yannis Papakonstantinou, Serge Abi...
CIKM
2001
Springer
13 years 8 months ago
Joint Optimization of Cost and Coverage of Query Plans in Data Integration
Existing approaches for optimizing queries in data integration use decoupled strategies–attempting to optimize coverage and cost in two separate phases. Since sources tend to ha...
Zaiqing Nie, Subbarao Kambhampati
VLDB
2004
ACM
97views Database» more  VLDB 2004»
13 years 9 months ago
Progressive Optimization in Action
Progressive Optimization (POP) is a technique to make query plans robust, and minimize need for DBA intervention, by repeatedly re-optimizing a query during runtime if the cardina...
Vijayshankar Raman, Volker Markl, David E. Simmen,...
DBISP2P
2004
Springer
111views Database» more  DBISP2P 2004»
13 years 9 months ago
Processing and Optimization of Complex Queries in Schema-Based P2P-Networks
Peer-to-Peer infrastructures are emerging as one of the important data management infrastructures in the World Wide Web. So far, however, most work has focused on simple P2P networ...
Hadhami Dhraief, Alfons Kemper, Wolfgang Nejdl, Ch...
ICDE
2010
IEEE
292views Database» more  ICDE 2010»
14 years 3 months ago
Exploring Power-Performance Tradeoffs in Database Systems
With the total energy consumption of computing systems increasing in a steep rate, much attention has been paid to the design of energy-efficient computing systems and applications...
Zichen Xu, Yi-Cheng Tu, Xiaorui Wang
SIGMOD
2006
ACM
162views Database» more  SIGMOD 2006»
14 years 3 months ago
Adaptive query processing: why, how, when, what next
Adaptive query processing has been the subject of a great deal of recent work, particularly in emerging data management environments such as data integration and data streams. We ...
Amol Deshpande, Joseph M. Hellerstein, Vijayshanka...
SIGMOD
2007
ACM
150views Database» more  SIGMOD 2007»
14 years 3 months ago
Exploiting self-monitoring sample views for cardinality estimation
Good cardinality estimates are critical for generating good execution plans during query optimization. Complex predicates, correlations between columns, and user-defined functions...
Jingren Zhou, Per-Åke Larson, Peter Zabback,...
ICDE
1999
IEEE
113views Database» more  ICDE 1999»
14 years 5 months ago
Capability-Sensitive Query Processing on Internet Sources
On the Internet, the limited query-processing capabilities of sources make answering even the simplest queries challenging. In this paper, we present a scheme called GenCompact fo...
Hector Garcia-Molina, Wilburt Labio, Ramana Yernen...
ICDE
2000
IEEE
89views Database» more  ICDE 2000»
14 years 5 months ago
Automating Statistics Management for Query Optimizers
Statistics play a key role in influencing the quality of plans chosen by a database query optimizer. In this paper, we identify the statistics that are essential for an optimizer....
Surajit Chaudhuri, Vivek R. Narasayya