mysql事务执行完毕,需要恢复autocommit=1吗?-PHP Tutorial-php.cn

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mysql事务执行完毕,需要恢复autocommit=1吗?

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Jun 20, 2016 pm 12:54 PM

set autocommit =0;     //关闭自动提交
start transaction;       //开启一个事务;
---------------------......
commit;                  //正式提交事务;事务结束;

commit之后,还要把set autocommit =1恢复吗?  我看别人的案例都没恢复,commit会自动恢复?

回复讨论(解决方案)

不需要
因为一般不会在一个程序代码中进行多次事务操作
即便是，那也是在你掌控中的
连接断开，设置就自动失效了

还是不太明白:
1.PHP一个脚本,实例化一次DB类, 假设该DB对象在该脚本中执行了100条各种命令,
他每次执行一条命令后,算是自动断开了连接了吗? 还是一直使用同样的连接? 是不是应该恢复自动提交;

autocommit 默认为1，即自动提交事务

你 set autocommit =0 是为了关闭自动提交，显然这是你个人的行为
所以事务结束后，是否需要将 autocommit 还原成 1，自然也是你的个人行为

你只要重新连接数据库， autocommit 依然是 1，并不管你上次操作后的状态。这才是服务器的行为

如果你在执行完一次事务后，还要再执行 100 次事务，你是关闭还是开启事务的自动提交呢？

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