计算机应用 ›› 2005, Vol. 25 ›› Issue (03): 631-633.DOI: 10.3724/SP.J.1087.2005.0631

• 软件技术 • 上一篇    下一篇

基于模式更新的实视图一致性维护策略

刘群,张春海,李华   

  1. 中国海洋大学计算机科学系
  • 发布日期:2005-03-01 出版日期:2005-03-01

Materialized view maintenance strategy based on schema changes推

LIU Qun,ZHANG Chun-hai,LI Hua   

  1. Department of Computer Science, Ocean University of China
  • Online:2005-03-01 Published:2005-03-01

摘要:

通过定义不同数据源更新之间的并发依赖关系和同源依赖关系,利用概念化事务模型可实现松散耦合环境中视图的并发维护。在此基础上,提出VMSCNF算法,解决不稳定网络环境中基于模式更新的实视图一致性维护问题,并通过实验原型验证了算法有效性。

关键词:  实视图维护, 模式更新, 概念化事务模型, 复合更新

Abstract:

The view maintenance process in the loosely coupled environment was implemented as a conceptual transaction, by the definitions of concurrency dependency and same-source dependency. Based on schema changes, the VMSCNF algorithm was proposed to solve the consistency of view maintenance processes in the non-FIFO network environments. Finally, a preliminary experiment was carried out to verify the efficiency of the proposed algorithm.

Key words: materialized view maintenance, schema changes, conceptual transaction model, complex updates

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