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Storing multidimensional XML documents in relational databases
(2007)
The problem of storing and querying XML data using relational databases has been considered a lot and many techniques have been developed. MXML is an extension of XML suitable for representing data that assume different ...
On solving efficiently the view selection problem under bag-semantics
(2009)
In this paper, we investigate the problem of view selection for workloads of conjunctive queries under bag semantics. In particular we aim to limit the search space of candidate viewsets. In that respect we start delineating ...
A value-propagating transformation technique for Datalog programs based on non-deterministic constructs
(2006)
The branching-time transformation is a recent technique for optimizing Chain Datalog programs. In this paper we propose a significant extension of the branching-time transformation which we believe opens up a promising new ...
On rewriting Xpath Queries Using Views
(2009)
The problem of rewriting a query using a materialized view is studied for a well known fragment of XPath that includes the following three constructs: wildcards, descendant edges and branches. In earlier work, determining ...