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SIGMOD
2011
ACM
198views Database» more  SIGMOD 2011»
14 years 7 months ago
U-MAP: a system for usage-based schema matching and mapping
This demo shows how usage information buried in query logs can play a central role in data integration and data exchange. More specifically, our system U-Map uses query logs to g...
Hazem Elmeleegy, Jaewoo Lee, El Kindi Rezig, Moura...
146
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SIGMOD
2011
ACM
202views Database» more  SIGMOD 2011»
14 years 7 months ago
Flexible aggregate similarity search
Aggregate similarity search, a.k.a. aggregate nearest neighbor (Ann) query, finds many useful applications in spatial and multimedia databases. Given a group Q of M query objects...
Yang Li, Feifei Li, Ke Yi, Bin Yao 0002, Min Wang
EDBT
2006
ACM
136views Database» more  EDBT 2006»
16 years 4 months ago
Optimizing Monitoring Queries over Distributed Data
Scientific data in the life sciences is distributed over various independent multi-format databases and is constantly expanding. We discuss a scenario where a life science research...
Frank Neven, Dieter Van de Craen
ADC
2005
Springer
114views Database» more  ADC 2005»
15 years 9 months ago
Optimization of Relational Preference Queries
The design and implementation of advanced personalized database applications requires a preference-driven approach. Representing preferences as strict partial orders is a good cho...
Bernd Hafenrichter, Werner Kießling
DBPL
1997
Springer
87views Database» more  DBPL 1997»
15 years 8 months ago
Incremental Recomputation of Recursive Queries with Nested Sets and Aggregate Functions
We examine the power of incremental evaluation systems that use an SQL-like language for maintaining recursively-de ned views. We show that recursive queries such as transitive clo...
Leonid Libkin, Limsoon Wong