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SIGMOD
2009
ACM
15 years 10 months ago
2009
ACM
DejaVu is an event processing system that integrates declarative pattern matching over live and archived streams of events on top of a novel system architecture. We propose to dem...
DOLAP
2007
ACM
15 years 1 months ago
2007
ACM
Expressing preferences when querying databases is a natural way to avoid empty results and information flooding, and in general to rank results so that the user may first see the ...
ICDE
2009
IEEE
15 years 4 months ago
2009
IEEE
The topic of managing uncertain data has been explored in many ways. Different methodologies for data storage and query processing have been proposed. As the availability of manag...
ISCI
2007
14 years 9 months ago
2007
In an object-relational database management system, a query optimizer requires users to provide cost models of userdefined functions. The traditional approach is analytical, that...
WWW
2009
ACM
15 years 10 months ago
2009
ACM
Web search engines are facing formidable performance challenges as they need to process thousands of queries per second over billions of documents. To deal with this heavy workloa...