651 search results - page 27 / 131 » Algebraic Query Optimization for Distributed Top-k Queries |
DPD
2002
13 years 8 months ago
2002
A major cost in executing queries in a distributed database system is the data transfer cost incurred in transferring relations (fragments) accessed by a query from different sites...
ICDE
2009
IEEE
14 years 10 months ago
2009
IEEE
We have developed a system to process database queries over composed data providing web services. The queries are transformed into execution plans containing an operator that invok...
SIGMOD
2007
ACM
14 years 9 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...
DEXAW
2007
IEEE
14 years 28 days ago
2007
IEEE
The vision of the Semantic Web is to make Web content machine-readable. To describe data, the Resource Description Framework has been extended with a schema-level and description ...
ICDE
2008
IEEE
14 years 10 months ago
2008
IEEE
In this paper we address the problem of minimizing the response time of a multi-way join query using pipelined (inter-operator) parallelism, in a parallel or a distributed environ...