ALTER TABLE後MySQL Shell中的回滾無效

Question

（MySQL 5.5，InnoDB表）爲什麼我不能回滾到保存點或以前的begin語句？

mysql> set autocommit=0; 
Query OK, 0 rows affected (0.00 sec) 

mysql> start transaction; 
Query OK, 0 rows affected (0.00 sec) 

mysql> savepoint id; 
Query OK, 0 rows affected (0.00 sec) 

mysql> alter table sg_Section add column (published tinyint(1) default 0); 
Query OK, 2 rows affected (0.30 sec) 
Records: 2 Duplicates: 0 Warnings: 0 

mysql> rollback to savepoint id; 
ERROR 1305 (42000): SAVEPOINT id does not exist 

當保存點之後不運行任何命令，它似乎«工作»：

mysql> savepoint id; 
Query OK, 0 rows affected (0.00 sec) 

mysql> rollback to savepoint id; 
Query OK, 0 rows affected (0.00 sec) 

Answer 1

DDL不是在MySQL事務性的。

任何DDL語句隱式提交打開的事務。

手冊中的更多細節：http://dev.mysql.com/doc/refman/5.5/en/implicit-commit.html