机构地区: 中山大学信息科学与技术学院计算机科学系
出 处: 《中山大学学报(自然科学版)》 2005年第5期21-24,共4页
摘 要: 通过对视图维护过程中的更新异常进行分析,发现并发更新是导致视图维护异常的主要原因。在并发环境下,数据更新和模式更新极有可能同时存在,这对视图维护工作带来极大的困难。在实例分析基础上,深入而细致地刻画了模式与数据全面并发的典型情形,为视图维护工作奠定基础。 Based on the analysis of view maintenance anomaly, the concurrent updates are found to be one of the main reasons that cause view maintenance anomaly. Meanwhile, data update and schema change are possible to coexist under the concurrent environment which brings about many problems to view maintenance. Thus, the typical situations that scheme change mixes with data updates concurrently are analyzed and explored by using examples.
领 域: [自动化与计算机技术] [自动化与计算机技术]