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HomeDatabaseMysql Tutorialmysql实现事务的提交和回滚实例_MySQL

mysql创建存储过程的官方语法为:

复制代码 代码如下:
START TRANSACTION | BEGIN [WORK]
COMMIT [WORK] [AND [NO] CHAIN] [[NO] RELEASE]
ROLLBACK [WORK] [AND [NO] CHAIN] [[NO] RELEASE]
SET AUTOCOMMIT = {0 | 1}

我这里要说明的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。这里需要注意的是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。

那么我们需要的是一个条件判断,比如loop,因为MySql默认是会自动提交的,所以我们不用担心rollback之后条件退出而没有commit。

具体mysql语句如下:

复制代码 代码如下:
begin
 loop_lable: loop
  start transaction;
   insert into table1(f_user_id) values(user_id);
  if row_count()     set @ret = -1;  
    rollback; 
    leave loop_label;
  end if;
  insert into table2(f_user_id) values(user_id);
 if row_count()   set @ret = -1; 
    rollback; 
   leave loop_label;
  end if;
   insert into table3(f_user_id) values(user_id);
  if row_count()     set @ret = -1; 
    rollback; 
    leave loop_label;
  else 
    set @ret = 0; 
    commit; 
    leave loop_label;
  end if;
  end loop;
  select @ret;
end 

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