We may not always want to roll back an entire transaction. SAVEPOINT is an SQL statement that creates a savepoint for a group of SQL statements within a transaction. A savepoint acts as a transaction marker. We
rollback work; 1. 2. 3. 4. 设置保存点 savepoint point_name; 1. 删除保存点,如果删除一个不存在的保存点会抛出异常 release savepoint point_name; 1. 回滚至某个保存点,从当前到该保存点之间的事务会撤销,保存点之前的事务不撤销 rollback to savepoint point_name; 1. 设置事务隔离级别,可以设置的隔...
保留点在事务处理完成(执行一条rollback或commit)会自动释放。但是你也可以使用release savepoint来明确释放保留点。 release savepoint 保留点名称; 1. 六、更改默认的提交行为(autocommit) MySQL语句执行时,默认会提交执行的MySQL语句,但是你也可以更改autocommit标志来指明是否自动提交SQL语句。 autocommit是针对单个连接的...
Re: Rollback/ commitPosted by: Sarmail Singh Date: October 26, 2004 11:22AM Following is the code, I tried without specifing SAvePoint, now roll back is always executed but data in database is not rolled back. import java.sql.*; import java.io.*; public class SavePoint{ ...
In MySQL 9.1, BEGIN, COMMIT, and ROLLBACK are not affected by --replicate-do-db or --replicate-ignore-db rules. When InnoDB performs a complete rollback of a transaction, all locks set by the transaction are released. If a single SQL statement within a transaction rolls back as a result...
Please note that some databases do not support transactions, such as older versions of MySQL. In these cases, the commit and rollback options become meaningless. Also, some databases handle transactions differently than others. For example, PostgreSQL handles transactions differently than the other maj...
In MySQL 5.7,BEGIN,COMMIT, andROLLBACKare not affected by--replicate-do-dbor--replicate-ignore-dbrules. WhenInnoDBperforms a complete rollback of a transaction, all locks set by the transaction are released. If a single SQL statement within a transaction rolls back as a result of an error...
SAVEPOINT Specify a point in a transaction to which later you can roll back. Example insert into emp (empno,ename,sal) values (109,’Sami’,3000); savepoint a; insert into dept values (10,’Sales’,’Hyd’); savepoint b; insert into salgrade values (‘III’,9000,12000); ...
Handler_savepoint_rollback 432 Handler_tmp_update 52 Handler_tmp_write 794786 Handler_update 187721 Handler_write 45178 Innodb_available_undo_logs 128 Innodb_background_log_sync 174887 Innodb_buffer_pool_bytes_data 497696768 Innodb_buffer_pool_bytes_dirty 966656 Innodb_buffer_pool_dump_...
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