Abstract: This paper discusses the idea to realize nesting transaction with savepoints, proposes the way to realize savepoint based on MVCC, and realizes nesting transaction by improving the log manager, the memory manager and version-choosing arithmetic in PostgreSQL.

摘要： 探讨了用保存点模拟嵌套事务的思想,给出了基于多版本并发控制技术的保存点实现方法,并在PostgreSQL系统上,通过改进其日志管理器、内存管理器和版本选择算法,成功地实现了嵌套事务。

关键词: 嵌套事务, 保存点, 日志, MVCC

CLC Number: 

• TP311.13