Discovering interesting inclusion dependencies: application to logical database tuning
Information Systems - Databases: Creation, management and utilization
Aggregate Queries Over Conditional Tables
Journal of Intelligent Information Systems
Self-maintainable Data Warehouse Views Using Differential Files
DEXA '02 Proceedings of the 13th International Conference on Database and Expert Systems Applications
Monotonic complements for independent data warehouses
The VLDB Journal — The International Journal on Very Large Data Bases
InterBase-KB: Integrating a Knowledge Base System with a Multidatabase System for Data Warehousing
IEEE Transactions on Knowledge and Data Engineering
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Views over databases have recently regained attention in the context of data warehouses, which are seen as materialized views. In this setting, efficient view maintenance is an important issue, for which the notion of self-maintainability has been identified as desirable. In this paper, we extend self-maintainability to (query and update) independence, and we establish an intuitively appealing connection between warehouse independence and view complements. Moreover, we study minimal complements and show how to compute them in the presence of key constraints and inclusion dependencies in the underlying databases. Taking advantage of these complements, an algorithm is outlined for the specification of independent warehouses.