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PODS
2003
ACM
142views Database» more  PODS 2003»
16 years 6 months ago
Query containment and rewriting using views for regular path queries under constraints
In this paper we consider general path constraints for semistructured databases. Our general constraints do not suffer from the limitations of the path constraints previously stud...
Gösta Grahne, Alex Thomo
FOIKS
2004
Springer
16 years 2 days ago
Query Answering and Containment for Regular Path Queries under Distortions
Abstract. We give a general framework for approximate query processing in semistructured databases. We focus on regular path queries, which are the integral part of most of the que...
Gösta Grahne, Alex Thomo
PVLDB
2010
89views more  PVLDB 2010»
15 years 5 months ago
Transforming Range Queries To Equivalent Box Queries To Optimize Page Access
Range queries based on L1 distance are a common type of queries in multimedia databases containing feature vectors. We propose a novel approach that transforms the feature space i...
Sakti Pramanik, Alok Watve, Chad R. Meiners, Alex ...
VLDB
1991
ACM
113views Database» more  VLDB 1991»
15 years 10 months ago
Implementing Set-Oriented Production Rules as an Extension to Starburst
This paper describes the implementation of a set-oriented database production rule language proposed in earlier papers. Our implementation uses the extensibility features of the St...
Jennifer Widom, Roberta Cochrane, Bruce G. Lindsay
286
Voted
SIGMOD
2006
ACM
123views Database» more  SIGMOD 2006»
16 years 6 months ago
Exploiting predicate-window semantics over data streams
The continuous sliding-window query model is used widely in data stream management systems where the focus of a continuous query is limited to a set of the most recent tuples. In ...
Thanaa M. Ghanem, Walid G. Aref, Ahmed K. Elmagarm...