1. George Papastefanatos 1, Fotini Anagnostou 1 Panos Vassiliadis 2, Yannis Vassiliou 1 (1) National Technical University of Athens {gpapas,yv}@dbnet.ece.ntua.gr (2) University of Ioannina pvassil@cs.uoi.gr HECATAEUS: A What-If Analysis Tool for Database Schema Evolution CSMR’08, Athens, April 2008

2. HECATAEUS at a glance Graph representation of database schema, views and queries Graph annotation with policies for regulating database schema evolution What-if analysis for evolution scenarios – highlight impact Graph metrics for design quality wrt evolution CSMR‘08, Athens, April 20082

3. Representing Database Constructs

4. Creating Events Annotating with policies Creating Scenarios CSMR‘08, Athens, April 20084

5. Highlight Impact CSMR‘08, Athens, April 20085

6. System Architecture CSMR‘08, Athens, April 20086 DDL files SQL scripts DB Catalog Parser Create DB Schema Evolution Manager Workload representation Evolution Semantics Validate Workload Graph Viewer DB Schema representation XML, jpeg Import/ Export Scenarios Graph Visualization Metric Manager