1168 search results - page 119 / 234 » Optimization strategies for complex queries |
151
click to vote
SIGMOD
1996
ACM
15 years 10 months ago
1996
ACM
Scheduling query execution plans is an important component of query optimization in parallel database systems. The problem is particularly complex in a shared-nothing execution en...
157
click to vote
CCGRID
2008
IEEE
16 years 27 days ago
2008
IEEE
Distributed applications tend to have a complex design due to issues such as concurrency, synchronization and communication. Researchers in the past have proposed abstractions to ...
180
click to vote
ATMOS
2007
15 years 8 months ago
2007
In railways systems the timetable is typically represented as a weighted digraph on which itinerary queries are answered by shortest path algorithms, usually running Dijkstra’s a...
180
click to vote
GIS
2010
ACM
15 years 5 months ago
2010
ACM
This paper proposes an efficient, decentralized algorithm for determining the topological relationship between two regions monitored by a geosensor network. Many centralized algo...
246
click to vote
SIGMOD
2007
ACM
16 years 6 months ago
2007
ACM
Accurate cardinality estimation is critically important to high-quality query optimization. It is well known that conventional cardinality estimation based on histograms or simila...