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» Indexing Distributed Complex Data for Complex Queries
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BMCBI
2006
145views more  BMCBI 2006»
13 years 7 months ago
Querying the public databases for sequences using complex keywords contained in the feature lines
Background: High throughput technologies often require the retrieval of large data sets of sequences. Retrieval of EMBL or GenBank entries using keywords is easy using tools such ...
Olivier Croce, Michaël Lamarre, Richard Chris...
DBISP2P
2004
Springer
111views Database» more  DBISP2P 2004»
14 years 1 months ago
Processing and Optimization of Complex Queries in Schema-Based P2P-Networks
Peer-to-Peer infrastructures are emerging as one of the important data management infrastructures in the World Wide Web. So far, however, most work has focused on simple P2P networ...
Hadhami Dhraief, Alfons Kemper, Wolfgang Nejdl, Ch...
DAWAK
2005
Springer
14 years 1 months ago
Automatic Selection of Bitmap Join Indexes in Data Warehouses
The queries defined on data warehouses are complex and use several join operations that induce an expensive computational cost. This cost becomes even more prohibitive when querie...
Kamel Aouiche, Jérôme Darmont, Omar B...
TKDE
2002
148views more  TKDE 2002»
13 years 7 months ago
Parallel Star Join + DataIndexes: Efficient Query Processing in Data Warehouses and OLAP
On-Line Analytical Processing (OLAP) refers to the technologies that allow users to efficiently retrieve data from the data warehouse for decision-support purposes. Data warehouses...
Anindya Datta, Debra E. VanderMeer, Krithi Ramamri...
SIGMOD
2003
ACM
105views Database» more  SIGMOD 2003»
14 years 7 months ago
Factorizing Complex Predicates in Queries to Exploit Indexes
Decision-support applications generate queries with complex predicates. We show how the factorization of complex query expressions exposes significant opportunities for exploiting...
Surajit Chaudhuri, Prasanna Ganesan, Sunita Sarawa...