DDL爲隱式提交若出如今begin與rollback之間,則會直接提交ddl以前的語句,以下:mysql
begin; select * from test; update test set add='25-933-733-123444' where ID=1;#未提交 delete fromorder where orderID=2;#已提交 truncate test;#已提交 select * from test;#已提交 drop table dbshards.aly_test;#已提交 show tables from dbshards like 'test';#已提交 create table test (orderID int);#已提交 insert into dbshards.aly_test (orderID) values (1),(2),(3),(4);#已提交 select * from dbshards.aly_test;#已提交 rollback;#無效
在遇到第一句ddl語句執行以後,已commit,致使最後的rollback不起做用sql
[即便設置 autocommit爲false,依然沒法回滾]spa
mysql> show variables like 'autocommit';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| autocommit | OFF |
+---------------+-------+code