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ICDE
2005
IEEE
14 years 6 months ago
2005
IEEE
We address the problem of executing continuous multiway join queries in unpredictable and volatile environments. Our query class captures windowed join queries in data stream syst...
ICDT
1999
ACM
13 years 9 months ago
1999
ACM
Electronic newsgroups are one of the primary means for the dissemination, exchange and sharing of information. We argue that the current newsgroup model is unsatisfactory, especial...
ADBIS
2009
Springer
13 years 11 months ago
2009
Springer
Abstract. In moving object databases, many authors assume that number and position of objects to be processed are always known in advance. Detecting an unknown moving object and pu...
SIGMOD
2007
ACM
14 years 5 months ago
2007
ACM
Complex queries often contain common or similar subexpressions, either within a single query or among multiple queries submitted as a batch. If so, query execution time can be imp...