Making multiple views self-maintainable in a data warehouse

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)121-134
Journal / PublicationData and Knowledge Engineering
Volume30
Issue number2
Publication statusPublished - Jun 1999
Externally publishedYes

Abstract

A data warehouse collects and maintains a large amount of data from several distributed and heterogeneous data sources. Often the data is stored in the form of materialized views in order to provide fast access to the integrated data, regardless of the availability of the data sources. In this paper we focus on the following problem: for a given set of materialized select-project-join (SPJ) views, how can we find and minimize the auxiliary data stored in a data warehouse in order to make all materialized views in the data warehouse self-maintainable? For this problem we first devise an algorithm for finding such an auxiliary view set by exploiting information sharing among the auxiliary views and materialized views themselves to reduce the total size of auxiliary views. We then consider how to make the data warehouse still self-maintainable by minor modifications when there is a view addition to or deletion from it by giving an algorithm for this incremental maintenance purpose.

Bibliographic Note

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Citation Format(s)

Making multiple views self-maintainable in a data warehouse. / Liang, Weifa; Li, Hui; Wang, Hui et al.

In: Data and Knowledge Engineering, Vol. 30, No. 2, 06.1999, p. 121-134.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review