31 search results - page 2 / 7 » Optimization of Systems of Algebraic Equations for Evaluatin... |
ICLP
2007
Springer
13 years 11 months ago
2007
Springer
We propose a novel technique that maps decision problems in WS1S (weak monadic second-order logic with n successors) to the problem of query evaluation of Complex-value Datalog que...
SIGMOD
2005
ACM
14 years 5 months ago
2005
ACM
This paper introduces RankSQL, a system that provides a systematic and principled framework to support efficient evaluations of ranking (top-k) queries in relational database syst...
SIGMOD
2001
ACM
14 years 5 months ago
2001
ACM
Time-referenced data are pervasive in most real-world databases. Recent advances in temporal query languages show that such database applications may benefit substantially from bu...
ICDE
2000
IEEE
14 years 6 months ago
2000
IEEE
In information-integration systems, sources may have diverse and limited query capabilities. In this paper we show that because sources have restrictions on retrieving their infor...
ICDE
2008
IEEE
14 years 6 months ago
2008
IEEE
This paper introduces U-relations, a succinct and purely relational representation system for uncertain databases. U-relations support attribute-level uncertainty using vertical pa...