par Waqas, Ahmed 
;Zimanyi, Esteban
Référence Communications in computer and information science, 539, page (346-357)
Publication Publié, 2015
;Zimanyi, Esteban Référence Communications in computer and information science, 539, page (346-357)
Publication Publié, 2015
Article révisé par les pairs
| Résumé : | Data warehouses (DWs) change in their content and structure due to changes in the feeding sources, business requirements, the modeled reality, and legislation, to name a few. Keeping the history of changes in the content and structure of a DW enables the user to analyze the state of the business world retrospectively or prospectively. Multiversion data warehouses (MVDWs) keep the history of content and structure changes by creating multiple data warehouse versions. Querying such DWs is complex as data is stored in multiple schema versions. In this paper, we discuss various schema changes in a multidimensional model, and elaborate their impact on the queries. Further, we also propose a system to support querying MVDWs. |
