708 search results - page 48 / 142 » A Genetic Algorithm for Database Query Optimization |
120
Voted
VLDB
1999
ACM
15 years 6 months ago
1999
ACM
We present an optimization method and algorithm designed for three objectives: physical data independence, semantic optimization, and generalized tableau minimization. The method ...
139
Voted
DASFAA
2006
IEEE
15 years 8 months ago
2006
IEEE
Abstract. In emerging data stream applications, data sources are typically distributed. Evaluating multi-join queries over streams from different sources may incur large communica...
109
Voted
CORR
2007
Springer
15 years 2 months ago
2007
Springer
We address the problem of answering Web ontology queries efficiently. An ontology is formalized as a Deductive Ontology Base (DOB), a deductive database that comprises the ontology...
118
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VLDB
1987
ACM
15 years 5 months ago
1987
ACM
Severalmethodshavebeenproposedto compile recursive Datalog programs. The most well-known perform a rewriting of rules using MAGIC or PROBLEM predicates in order to push selections...
193
Voted
SIGMOD
2007
ACM
16 years 2 months ago
2007
ACM
Partial evaluation has recently proven an effective technique for evaluating Boolean XPath queries over a fragmented tree that is distributed over a number of sites. What left ope...