829 search results - page 15 / 166 » Location-aware Query Processing and Optimization |
DEBU
2000
13 years 7 months ago
2000
Execution plans produced by traditional query optimizers for data integration queries may yield poor performance for several reasons. The cost estimates may be inaccurate, the mem...
SIGMOD
2004
ACM
14 years 7 months ago
2004
ACM
An effective query optimizer finds a query plan that exploits the characteristics of the source data. In data integration, little is known in advance about sources' propertie...
FUIN
2006
13 years 7 months ago
2006
In this paper we deal with the problem of finding an optimal query execution plan in database systems. We improve the analysis of a polynomial-time approximation algorithm due to M...
DEXAW
2004
IEEE
13 years 11 months ago
2004
IEEE
Database-like query processing over a network of sensors has become an attractive paradigm for building sensor applications. A sensor query is characterized by data streams among ...
EDBT
2006
ACM
14 years 7 months ago
2006
ACM
Federated queries are regular relational queries accessing data on one or more remote relational or non-relational data sources, possibly combining them with tables stored in the ...