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SIGMOD
2007
ACM
14 years 10 months ago
2007
ACM
An important problem for many location-based applications is the continuous evaluation of proximity relations among moving objects. These relations express whether a given set of ...
SIGMOD
2007
ACM
14 years 10 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...
SIGMOD
2007
ACM
14 years 10 months ago
2007
ACM
Optimizing SQL subqueries has been an active area in database research and the database industry throughout the last decades. Previous work has already identified some approaches ...
SIGMOD
2007
ACM
14 years 10 months ago
2007
ACM
Incomplete information arises naturally in numerous data management applications. Recently, several researchers have studied query processing in the context of incomplete informat...
SIGMOD
2006
ACM
14 years 10 months ago
2006
ACM
Given a dataset P and a preference function f, a top-k query retrieves the k tuples in P with the highest scores according to f. Even though the problem is well-studied in convent...