Database schema evolution through the specification and maintenance of changes on entities and relationships

Chien Tsai Liu, Panos K. Chrysanthis, Shi Kuo Chang

研究成果: 書貢獻/報告類型會議貢獻

16 引文 斯高帕斯(Scopus)

摘要

A flexible database system needs to support changes to its schema in order to facilitate the requirements of new applications and to support interoperability within a multidatabase system. In this paper, we present an approach to schema evolution through changes to the Entity-Relationship (ER) schema of a database. We enhance the graphical constructs used in ER diagrams, and develop EVER, an EVolutionary ER diagram for specifying the derivation relationships between schema versions, relationships among attributes, and the conditions for maintaining consistent views of programs. Algorithms are presented for mapping the EVER diagram into the underlying database and constructing database views for schema versions. Through the reconstruction of views after database reorganization, changes to an ER diagram can be made transparent to the application programs while all objects in the database remain accessible to the application programs.

原文英語
主出版物標題Entity-Relationship Approach - ER 1994
主出版物子標題Business Modelling and Re-Engineering - 13th International Conference on the Entity-Relationship Approach, Proceedings
發行者Springer Verlag
頁面132-151
頁數20
881 LNCS
ISBN(列印)9783540587866
出版狀態已發佈 - 1994
事件13th International Conference on the Entity-Relationship Approach, ER 1994 - Manchester, 英国
持續時間: 十二月 13 1994十二月 16 1994

出版系列

名字Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
881 LNCS
ISSN(列印)0302-9743
ISSN(電子)1611-3349

其他

其他13th International Conference on the Entity-Relationship Approach, ER 1994
國家英国
城市Manchester
期間12/13/9412/16/94

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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