651 search results - page 123 / 131 » Algebraic Query Optimization for Distributed Top-k Queries |
CIKM
2010
Springer
13 years 6 months ago
2010
Springer
We consider the problem of learning to rank relevant and novel documents so as to directly maximize a performance metric called Expected Global Utility (EGU), which has several de...
VLDB
1992
ACM
13 years 11 months ago
1992
ACM
This paper evaluates the performance of the parallel, main-memory DBMS, PRISMA/DB. First, an architecture for parallel query execution is presented. A performance model for the ex...
EDBT
2009
ACM
13 years 11 months ago
2009
ACM
Given a set P of products, a set O of customers, and a product p P, a bichromatic reverse skyline query retrieves all the customers in O that do not find any other product in P t...
EDBT
2010
ACM
13 years 11 months ago
2010
ACM
The specification of schema mappings has proved to be time and resource consuming, and has been recognized as a critical bottleneck to the large scale deployment of data integrati...
WWW
2007
ACM
14 years 8 months ago
2007
ACM
With the growing use of dynamic web content generated from relational databases, traditional caching solutions for throughput and latency improvements are ineffective. We describe...