In this demo we present X-Time, a prototype for managing schema versioning in relational data warehouses, specifically oriented to support the formulation of crossversion queries,...
While much work has addressed the problem of maintaining materialized views, the important question of optimizing queries in the presence of materialized views has not been resolv...
Surajit Chaudhuri, Ravi Krishnamurthy, Spyros Pota...
The ability to represent and query continuously moving objects is important in many applications of spatio-temporal database systems. In this paper we develop data structures for ...
Pankaj K. Agarwal, Lars Arge, Jeff Erickson, Hai Y...
The use of the Yager's OWA operators within a flexible querying interface is discussed. The key issue is the adaptation of an OWA operator to the specifics of a user's qu...
The management and querying of workflow provenance data underpins a collection of activities, including the analysis of workflow results, and the debugging of workflows or service...