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» On the Computation of Approximations of Database Queries
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SIGMOD
2007
ACM
219views Database» more  SIGMOD 2007»
16 years 6 months ago
Efficient exploitation of similar subexpressions for query processing
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...
Jingren Zhou, Johann Christoph Freytag, Per-Å...
CPM
1998
Springer
209views Combinatorics» more  CPM 1998»
15 years 10 months ago
A Fast Bit-Vector Algorithm for Approximate String Matching Based on Dynamic Programming
The approximate string matching problem is to find all locations at which a query of length m matches a substring of a text of length n with k-or-fewer differences. Simple and prac...
Gene Myers
GCB
1997
Springer
77views Biometrics» more  GCB 1997»
15 years 10 months ago
Statistics of large scale sequence searching
Motivation: Database search programs such as FASTA, BLAST or a rigorous Smith–Waterman algorithm produce lists of database entries, which are assumed to be related to the query....
Rainer Spang, Martin Vingron
ICDE
2006
IEEE
192views Database» more  ICDE 2006»
16 years 8 months ago
MAPLE: A Mobile Scalable P2P Nearest Neighbor Query System for Location-based Services
In this demonstration we present MAPLE, a scalable peer-to-peer Nearest Neighbor (NN) query system for mobile environments. MAPLE is designed for the efficient sharing of query re...
Wei-Shinn Ku, Roger Zimmermann, Chi-Ngai Wan, Haoj...
SCCC
2005
IEEE
16 years 4 days ago
Optimizing repair programs for consistent query answering
Databases may not satisfy integrity constraints (ICs) for several reasons. Nevertheless, in most of the cases an important part of the data is still consistent wrt certain desired...
Mónica Caniupán Marileo, Leopoldo E....