777 search results - page 68 / 156 » Optimization of Relational Preference Queries |
IDEAS
2007
IEEE
14 years 4 months ago
2007
IEEE
In this paper we study the problem of deciding whether a regular path query over views in data-integration systems can be re-expressed without recursion. The problem becomes chall...
WEBI
2010
Springer
13 years 8 months ago
2010
Springer
This paper intends to present a straightforward, extensive, and noise resistant method for efficiently tagging a web query, submitted to a search engine, with proper category label...
JODS
2006
13 years 10 months ago
2006
This paper addresses the various facets of emergent semantics in content retrieval systems such as Knowledge Sifter, an architecture and system based on the use of specialized agen...
PLDI
1995
ACM
14 years 1 months ago
1995
ACM
The control dependence relation is used extensively in restructuring compilers. This relation is usually represented using the control dependence graph; unfortunately, the size of...
PVLDB
2010
13 years 8 months ago
2010
Optimization of join queries based on average selectivities is suboptimal in highly correlated databases. In such databases, relations are naturally divided into partitions, each ...