ACM SIGMOD Anthology VLDB dblp.uni-trier.de

Cumulative Updates.

Suryanarayana M. Sripada, Beat Wüthrich: Cumulative Updates. VLDB 1994: 534-545
@inproceedings{DBLP:conf/vldb/SripadaW94,
  author    = {Suryanarayana M. Sripada and
               Beat W{\"u}thrich},
  editor    = {Jorge B. Bocca and
               Matthias Jarke and
               Carlo Zaniolo},
  title     = {Cumulative Updates},
  booktitle = {VLDB'94, Proceedings of 20th International Conference on Very
               Large Data Bases, September 12-15, 1994, Santiago de Chile, Chile},
  publisher = {Morgan Kaufmann},
  year      = {1994},
  isbn      = {1-55860-153-8},
  pages     = {534-545},
  ee        = {db/conf/vldb/vldb94-534.html},
  crossref  = {DBLP:conf/vldb/94},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

When an update to a view is requested by a user, there may be no unique way of updating the stored relations in the database to realize the requested update. Chosing one of the alternatives for updating stored relations may not reflect the change that has actually taken place in the real world; in the presence of other derived views, the database may actually present a very wrong model of the world to the user. The problem is even more severe in the case of deductive databases. For avoiding this problem, we introduce a new notion of view updates, called cumulative updates. The key idea behind cumulative updates is that update mechanisms should wait for further update requests to resolve ambiguities. Equivalently, current update requests must also take into account previous requests made to the knowledge base. Cumulative updates, therefore, subsume conventional updates in which only the current update request is considered. In this paper, we motivate the need for cumulative updates and formally define the notion of such updates as well as the different classes therein. We then give methods for computing one particular class of cumulative updates.

Copyright © 1994 by the VLDB Endowment. Permission to copy without fee all or part of this material is granted provided that the copies are not made or distributed for direct commercial advantage, the VLDB copyright notice and the title of the publication and its date appear, and notice is given that copying is by the permission of the Very Large Data Base Endowment. To copy otherwise, or to republish, requires a fee and/or special permission from the Endowment.


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Printed Edition

Jorge B. Bocca, Matthias Jarke, Carlo Zaniolo (Eds.): VLDB'94, Proceedings of 20th International Conference on Very Large Data Bases, September 12-15, 1994, Santiago de Chile, Chile. Morgan Kaufmann 1994, ISBN 1-55860-153-8
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