What-If Analysis for Data Warehouse Evolution

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 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.

• Type: Conference
• Year: 2007
• Where: DAWAK
• Authors: George Papastefanatos, Panos Vassiliadis, Alkis Simitsis, Yannis Vassiliou
• Keywords: Data Mining, Data Warehouse, DAWAK 2007, Software Modules, What-if Analysis