Data warehouse schema and instance design

Dimitri Theodoratos, Timos Sellis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations

Abstract

A Data Warehouse (DW) is a database that collects and stores data from multiple remote and heterogeneous information sources. When a query is posed, it is evaluated locally, without accessing the original information sources. In this paper we deal with the issue of designing a DW, in the context of the relational model, by selecting a set of views to materialize in it. Views allow to compute both the schema and the instance of the DW from the schemas and the instances of the source relations. We briefly present a theoretical framework for the DW design problem, which concerns the selection of a set of views that (a) fits in the space allocated to the DW, (b) answers all the queries of interest, and (c) minimizes the total query evaluation and view maintenance cost. We then formalize it as a state space search problem by taking into account multiquery optimization over the maintenance queries (i.e. queries that compute changes to the materialized views) and the use of auxiliary views for reducing the view maintenance cost. Finally, incremental algorithms and heuristics for pruning the search space are presented.

Original languageEnglish (US)
Title of host publicationConceptual Modeling - ER 1998 - 17th International Conference on Conceptual Modeling, Proceedings
EditorsSudha Ram, Tok Wang Ling, Mong Li Lee
PublisherSpringer Verlag
Pages363-376
Number of pages14
ISBN (Print)3540651896, 9783540651895
DOIs
StatePublished - Jan 1 1998
Externally publishedYes
Event17th International Conference on Conceptual Modeling, ER 1998 - Singapore, Singapore
Duration: Nov 16 1998Nov 19 1998

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume1507
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Other

Other17th International Conference on Conceptual Modeling, ER 1998
Country/TerritorySingapore
CitySingapore
Period11/16/9811/19/98

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Computer Science(all)

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