Incremental view update for a mobile data warehouse

Ken C.K. Lee, Antonio Si, Hong Va Leong

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

4 Citations (Scopus)


In a mobile environment, querying the database at a stationary server by a mobile client is expensive due to the limited bandwidth of a wireless channel and the instability of the wireless network. We address this problem by maintaining a materialized view in a mobile client's local storage. The materialized view contains results of common queries in which the mobile client is interested. We term such a materialized view, a mobile data warehouse. In this paper, we address the view update problem for maintaining a mobile data warehouse, viz., changes to the database should be reflected to the derived materialized view in a consistent manner. Existing view update mechanisms are "push-based". The server is responsible for notifying adi clients whose views might be affected by the database changes. This is not appropriate in a mobile environment due to the frequent disconnection of a wireless channel. We propose a "pull-based" approach that allows a materialized view to be updated at clients incrementally. Our approach requires a client to request changes to its view from the server when the client needs it. We will demonstrate the feasibility of our approach with preliminary experiments via simulation.
Original languageEnglish
Title of host publicationProceedings of the 1998 ACM Symposium on Applied Computing, SAC 1998
PublisherAssociation for Computing Machinery
Number of pages6
ISBN (Electronic)0897919696
Publication statusPublished - 27 Feb 1998
Event1998 ACM Symposium on Applied Computing, SAC 1998 - Atlanta, United States
Duration: 27 Feb 19981 Mar 1998


Conference1998 ACM Symposium on Applied Computing, SAC 1998
Country/TerritoryUnited States


  • Data warehouse
  • Materialized view
  • Mobile database
  • View maintenance

ASJC Scopus subject areas

  • Software


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