515 search results - page 43 / 103 » Query Decomposition, Optimization and Processing in Multidat... |
131
click to vote
ICSNW
2004
Springer
15 years 3 months ago
2004
Springer
Knowledge Sifter is a scaleable agent-based system that supports access to heterogeneous information sources such as the Web, open-source repositories, XML-databases and the emergi...
CIKM
2005
Springer
15 years 3 months ago
2005
Springer
We examine issues in the design of fully dynamic information retrieval systems with support for instantaneous document insertions and deletions. We present one such system and dis...
147
click to vote
SIGMOD
2009
ACM
15 years 10 months ago
2009
ACM
In order to enable extensibility, modern query optimizers typically leverage a transformation rule based framework. Testing individual rule correctness as well as correctness of r...
155
click to vote
SIGMOD
2006
ACM
15 years 9 months ago
2006
ACM
This paper presents a principled framework for efficient processing of ad-hoc top-k (ranking) aggregate queries, which provide the k groups with the highest aggregates as results....
ICEBE
2005
IEEE
15 years 3 months ago
2005
IEEE
Electronic commerce is emerging as a major application area for database systems. A large number of e-commerce stores provide electronic product catalogs that allow customers to s...