2228 search results - page 67 / 446 » A System for Semantic Query Optimization |
ICMCS
2005
IEEE
14 years 2 months ago
2005
IEEE
This paper introduces a new approach of approximating the selectivity of multimedia range queries. Estimating the selectivity of a range query is a pre-requisite to optimize a mul...
ECAI
2000
Springer
14 years 1 months ago
2000
Springer
In this paper, we study unsatisfiable queries posed to a mediator in an information integration system and expressed in the logical formalism of the information integration system...
SEBD
2003
13 years 10 months ago
2003
Current image retrieval systems do not provide users with adequate interfaces able to reduce the semantic gap existing between the high-level semantics of images (as perceived by t...
DEBU
2000
13 years 9 months ago
2000
Execution plans produced by traditional query optimizers for data integration queries may yield poor performance for several reasons. The cost estimates may be inaccurate, the mem...
SUM
2007
Springer
14 years 3 months ago
2007
Springer
Abstract. We present the Consistency Extractor System (ConsEx) that uses answer set programming to compute consistent answers to first-order queries posed to relational databases ...