【摘要】 通过保存点实现部分回滚是事务理论中的一个重要方法,它能够极大地提高数据库管理系统的事务管理的灵活性和系统的性能。基于保存点的原理,本文提出了基于多版本并发控制下DBMS的事务保存点实现方法,并通过改进PostgreSQL进行了验证。最后给出保存点在工作流事务中的应用。更多还原

【Abstract】 Implementating partial rollback by savepoint is a fundament method in transaction theory, this method can improve flexibility of transaction management and system performance. This paper describes the way to realize savepoint based on multi-version concurrency control and presents a detailed description of how it is combined with PostgreSQL’s concurrency control component. Furthermore, we discuss the application of savepoint in the work-flow transaction field.更多还原