介绍了mysql实现事务的提交和回滚。
mysql存储过程创建官方语法为:
START TRANSACTION | BEGIN [WORK]
COMMIT [WORK] [AND [NO] CHAIN] [[NO] RELEASE]
ROLLBACK [WORK] [AND [NO] CHAIN] [[NO] RELEASE]
SET AUTOCOMMIT = {0 | 1}
说明,mysql事务处理多个SQL语句的回滚情况。比如说在一个存储过程中启动一个事务,这个事务同时往三个表中插入数据,每插完一张表需要判断其是否操作成功,如果不成功则需要回滚,最后一张表判断其插入成功之后commit。注意,不能直接使用事务的collback,这样是不能实现回滚的或者说可能出现意外的错误。
需要一个条件判断,比如loop,因为MySql默认是会自动提交的,所以不用担心rollback之后条件退出而没有commit。
具体mysql语句下:
begin loop_lable: loop start transaction;insert into table1(f_user_id) values(user_id); if row_count()

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