418 search results - page 21 / 84 » Optimizing Large Join Queries in Mediation Systems |
CORR
2008
Springer
13 years 7 months ago
2008
Springer
A purely relational account of the true XQuery semantics can turn any relational database system into an XQuery processor. Compiling nested expressions of the fully compositional X...
KRDB
1998
13 years 9 months ago
1998
We present a semantic caching approach for optimizing the performance of information mediators. A critical problem with information mediators, particularly those gathering and int...
BNCOD
2011
12 years 7 months ago
2011
Due to high data volumes and unpredictable arrival rates, continuous query systems processing expensive queries in real-time may fail to keep up with the input data streams - resul...
GEOINFO
2003
13 years 9 months ago
2003
Relational index structures, as for instance the Relational Interval Tree, the Relational R-Tree, or the Linear Quadtree, support efficient processing of queries on top of existing...
IDEAS
2000
IEEE
14 years 1 days ago
2000
IEEE
Today many applications routinely generate large quantities of data. The data often takes the form of (time) series, or more generally streams, i.e. an ordered sequence of records...