Sciweavers

621 search results - page 61 / 125
» Efficient algorithms for minimizing tree pattern queries
Sort
View
ICDE
2008
IEEE
204views Database» more  ICDE 2008»
14 years 9 months ago
Keyword Search on Spatial Databases
Many applications require finding objects closest to a specified location that contains a set of keywords. For example, online yellow pages allow users to specify an address and a ...
Ian De Felipe, Vagelis Hristidis, Naphtali Rishe
BNCOD
2004
184views Database» more  BNCOD 2004»
13 years 9 months ago
Bulk Loading the M-Tree to Enhance Query Performance
The M-tree is a paged, dynamically balanced metric access method that responds gracefully to the insertion of new objects. Like many spatial access methods, the M-tree's perfo...
Alan P. Sexton, Richard Swinbank
VLDB
1994
ACM
153views Database» more  VLDB 1994»
14 years 1 days ago
Optimization Algorithms for Exploiting the Parallelism-Communication Tradeoff in Pipelined Parallelism
We address the problem of finding parallel plans for SQL queries using the two-phase approach of join ordering followed by parallelization. We focus on the parallelization phase a...
Waqar Hasan, Rajeev Motwani
EUROPAR
2007
Springer
13 years 12 months ago
Fast and Efficient Total Exchange on Two Clusters
Abstract. Total Exchange is one of the most important collective communication patterns for scientific applications. In this paper we propose an algorithm called LG for the total e...
Emmanuel Jeannot, Luiz Angelo Steffenel
DMDW
2000
161views Management» more  DMDW 2000»
13 years 9 months ago
View materialization for nested GPSJ queries
View materialization is a central issue in logical design of data warehouses since it is one of the most powerful techniques to improve the response to the workload. Most approach...
Matteo Golfarelli, Stefano Rizzi