What Time Is It in the Data Warehouse?

  • Stefano Rizzi
  • Matteo Golfarelli
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4081)


Though in most data warehousing applications no relevance is given to the time when events are recorded, some domains call for a different behavior. In particular, whenever late registrations of events take place, and particularly when the events registered are subject to further updates, the traditional design solutions fail in preserving accountability and query consistency. In this paper we discuss the alternative design solutions that can be adopted, in presence of late registrations, to support different types of queries that enable meaningful historical analysis. These solutions are based on the enforcement of the distinction between transaction time and valid time within the model that represents the fact of interest. In particular, we show how late registrations can be differently supported depending on the flow or stock semantics given to events.


Inventory Level Design Solution Data Warehouse Enrollment Date Valid Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Stefano Rizzi
    • 1
  • Matteo Golfarelli
    • 1
  1. 1.DEISUniversity of BolognaItaly

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