jmbkeyes

摘要：Batching not working even after configuring the properties The most probable reason is that you are using GenerationType.IDENTITY identifier generator 阅读全文

摘要：隔离级别为 REPEATABLE-READ：起两个MySQL命令行客户端A、B，两边都 set autocommit = 0; start transaction; 实验一：A更新一条数据行 id = 1，值更新为 99，此时A不提交，B是查不到新值99的。A提交，B直接查询此条数据，可以查到值99 阅读全文