Browsing by Subject "Query processing"
Now showing items 1-5 of 5
(Institute of Electrical and Electronics Engineers, 2006)
Open AccessThe use of evolutionary algorithms has been proposed as a powerful random search strategy to solve the join order problem. Specifically, genetic programming used in query optimization has been proposed as an alternative ...
Restricted access - publisher's policyIn this paper we try to understand the heuristics that underlie the decisions made by the Horn query learning algorithm proposed in . We take advantage of our explicit representation of such heuristics in order to ...
Restricted access - publisher's policyWe describe a software architecture we have developed for a constructive containment checker of Entity SQL queries defined over extended ER schemas expressed in Microsoft's Entity Data Model. Our application of interest ...
Open AccessIn this paper we study instance-level update in DL-LiteA, the description logic underlying the OWL 2 QL standard. In particular we focus on formula-based approaches to ABox insertion and deletion. We show that DL-LiteA, ...
External research report
Open AccessMappings between schemas are key elements in several contexts such as data exchange, data integration, peer data management systems, etc. In all these contexts, the process of designing a mapping requires the participation ...