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VLDB
2004
ACM
101views Database» more  VLDB 2004»
16 years 11 hour ago
Taming XPath Queries by Minimizing Wildcard Steps
This paper presents a novel and complementary technique to optimize an XPath query by minimizing its wildcard steps. Our approach is based on using a general composite axis called...
Chee Yong Chan, Wenfei Fan, Yiming Zeng
ICDE
2001
IEEE
121views Database» more  ICDE 2001»
16 years 8 months ago
Integrating Semi-Join-Reducers into State of the Art Query Processors
Semi-join reducers were introduced in the late seventies as a means to reduce the communication costs of distributed database systems. Subsequent work in the eighties showed, howe...
Konrad Stocker, Donald Kossmann, Reinhard Braumand...
PVLDB
2010
123views more  PVLDB 2010»
15 years 5 months ago
Sharing-Aware Horizontal Partitioning for Exploiting Correlations During Query Processing
Optimization of join queries based on average selectivities is suboptimal in highly correlated databases. In such databases, relations are naturally divided into partitions, each ...
Kostas Tzoumas, Amol Deshpande, Christian S. Jense...
HT
2007
ACM
15 years 10 months ago
Lesson learnt from a large-scale industrial semantic web application
The design and maintenance of an aero-engine generates a significant amount of documentation. When designing new engines, engineers must obtain knowledge gained from maintenance o...
Sylvia C. Wong, Richard M. Crowder, Gary B. Wills,...
ICDE
2009
IEEE
129views Database» more  ICDE 2009»
16 years 8 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