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
When a connection is setup with the auto-commit mode set to off or "smart commit", the SQL Commit and Rollback options become available. Use the commit option to commit a transaction or statement of work to the database. Use the rollback option to rollback any work since the last commi...
savepoint identifier, savepoint 允许在事务中创建一个保存点,一个事务中可以有多个savepoint release savepoint identifier 删除一个事务的保存点,当没有指定的保存点时,执行该语句会抛出一个异常。ERROR 1305 (42000): SAVEPOINT identifier does not exist rollback to identifier 把事务回滚到标记点 set transaction ...
To rollback the changes done in a transaction give rollback statement. Rollback restore the state of the database to the last commit point. Example : delete from emp; rollback; /* undo the changes */ SAVEPOINT Specify a point in a transaction to which later you can roll back. Example ...
commit or rollback operation will be performed at the end of an application process depending on the application environment. Thus, a portable application should explicitly execute a COMMIT or ROLLBACK statement before execution ends in those environments where explicit COMMIT or ROLLBACK is permitted...
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{ ...
COMMIT会将该语句所对应的事务对数据库的所有更新持久化(即写入磁盘),数据库此时进入一个新的一致性状态,同时该事务成功地结束。ROLLBACK操作将该语句所对应的事务对数据库的所有更新全部撤销,把数据库恢复到该事务初启动前的一致性状态。 为了提高事务管理的灵活性,DM数据库还提供了设置保存点(SAVEPOINT)和回滚到保...
In[7]:= Direct link to example Copy to clipboard. In[8]:= Direct link to example Out[8]= Copy to clipboard. In[9]:= Direct link to example Copy to clipboard. In[10]:= Direct link to example 参见 SQLBeginTransactionSQLRollbackTransactionSQLSetSavepointSQLSavepoint...
SAVEPOINT - identify a point in a transaction to which you can later roll back ROLLBACK - restore database to original since the last COMMIT SET TRANSACTION - Change transaction options like isolation level and what rollback segment to use ...
--=== --答案:不可以 /* Msg 3931, Level 16, State 1, Procedure utr_TB2_INSERT, Line 17 The current transaction cannot be committed and cannot be rolled back to a savepoint. Roll back the entire transaction. */