SAVEPOINT identifier:SAVEPOINT允许你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,当没有一个保存点执行这句语句时,会抛出一个异常。 ROLLBACK TO[SAVEPOINT]identifier:这个语句与SAVEPOINT命令一起使用。可以把事务回滚到标记点,
ROLLBACK TO[SAVEPOINT]identifier:这个语句与SAVEPOINT命令一起使用。可以把事务回滚到标记点,而不回滚在此标记点之前的任何工作。例如可以发出两条UPDATE语句,后面跟一个SAVEPOINT,然后又是两条DELETE语句。如果执行DELETE语句期间出现了某种异常情况,而且你捕获到这个异常,并发出ROLLBACK TO SAVEPOINT命令,事务就会回滚到...
重载列表 展开表 名称说明 rollback () 撤消在当前事务中所做的所有更改并释放当前由此 SQLServerConnection 对象保留的任何数据库锁。 rollback (java.sql.Savepoint) 撤消在设置给定 SQLServerSavepoint 对象后所做的所有更改。 另请参阅 SQLServerConnection 成员 SQLServerConnection 类其他...
事务控制语句 ,begin,rollback,savepoint,隐式提交的 SQL语句 事务控制语句 在MySQL命令⾏的默认设置下，事务都是⾃动提交的，即执⾏SQL语句后就会马上执⾏COMMIT操作。因此开始⼀个事务，必须使⽤ BEGIN、START TRANSACTION，或者执⾏SET AUTOCOMMIT=0，以禁⽤当前会话的⾃动提交。这和Microsoft SQL ...
在上面的例子中可以看到,虽然我们在发生重复错误后,通过ROLLBACK TO SAVEPOINT t2命令回滚到了保存点t2,但是事务此时并没有结束,我们再接着运行ROLLBACK后,事务才完整回滚。需要再次提醒的是,ROLLBACK TO SAVEPOINT命令并不真正地结束事务。 隐式提交的SQL语句 ...
transaction_name一律區分大小寫,即使 SQL Server 實例不區分大小寫也一樣。 @tran_name_variable 包含有效交易名稱的使用者定義變數名稱。 這個變數必須用 char、varchar、nchar 或nvarchar 資料類型來宣告。 savepoint_name 從SAVE TRANSACTION 語句savepoint_name。 savepoint_name 必須符合識別碼的規則。 當條件式復原...
In this tutorial, we’ll learn how to use COMMIT, ROLLBACK, and SAVEPOINT to run a user-managed transaction within a MySQL database. 2. Transactions A database transaction is a unit of SQL work. Furthermore, each SQL statement runs within a separate transaction by default. Therefore, these...
ROLLBACK[WORK]TO[SAVEPOINT]<savepoint_name> Description Roll back all commands that were executed after the savepoint was set. The savepoint remains valid and you can roll back to it again if you need to. ROLLBACK TO SAVEPOINTdestroys all savepoints that were established afte...
Executing aROLLBACKin a plpgsql procedure will throw an error if there is an Oracle-style SPL procedure on the runtime stack. Examples To abort all changes: ROLLBACK; See Also COMMIT,ROLLBACK TO SAVEPOINT,SAVEPOINT ← Prev REVOKE ↑ Up ...
some databases handle transactions differently than others. For example, PostgreSQL handles transactions differently than the other major databases such as Oracle or SQL Server. RazorSQL attempts to handle this by issuing SavePoints when using PostgreSQL in auto-commit off mode so that transactions do...