SAC
2011
ACM
13 years 2 months ago
2011
ACM
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...
EDBT
1998
ACM
14 years 3 months ago
1998
ACM
Abstract. Fusion queries search for information integrated from distributed, autonomous sources over the Internet. We investigate techniques for e cient processing of fusion querie...
CIKM
2001
Springer
14 years 4 months ago
2001
Springer
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...
VLDB
2004
ACM
14 years 4 months ago
2004
ACM
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...
DBISP2P
2004
Springer
14 years 4 months ago
2004
Springer
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...
ICDE
2010
IEEE
14 years 11 months ago
2010
IEEE
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...
SIGMOD
2006
ACM
14 years 11 months ago
2006
ACM
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 ...
SIGMOD
2007
ACM
14 years 11 months ago
2007
ACM
Good cardinality estimates are critical for generating good execution plans during query optimization. Complex predicates, correlations between columns, and user-defined functions...
ICDE
1999
IEEE
15 years 23 days ago
1999
IEEE
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...
ICDE
2000
IEEE
15 years 23 days ago
2000
IEEE
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....