Semantics and implementation of schema evolution in object-oriented databases
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ACM SIGMOD Record
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EDBT '98 Proceedings of the 6th International Conference on Extending Database Technology: Advances in Database Technology
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The VLDB Journal — The International Journal on Very Large Data Bases
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ADBIS'09 Proceedings of the 13th East European conference on Advances in Databases and Information Systems
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In this paper, we deal with the problem of performing what-if analysis for changes that occur in the schema/structure of the data warehouse sources. We abstract software modules, queries, reports and views as (sequences of) queries in SQL enriched with functions. Queries and relations are uniformly modeled as a graph that is annotated with policies for the management of evolution events. Given a change at an element of the graph, our method detects the parts of the graph that are affected by this change and indicates the way they are tuned to respond to it.