... 不允许空值(NULL VALUE NOT ALLOWED) 事务回滚(TRANSACTION ROLLBACK) 违反事务完整性约束(TRANSACTION INTEGRITY CONSTRAINT VIOLATION) ...
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When and where should you specify the transaction rollback directives?
您应该在何时何种情况下指定事务回滚指令?
In the case of an error, the transaction logic can specify that the transaction rollback to a savepoint.
在发生错误的情况下,事务逻辑可以指定该事务回滚到某个保存点。
Conversely, application exceptions under EJB 1.0 automatically caused a transaction rollback under certain circumstances.
反过来说,EJB 1.0下发生的应用程序异常在某种环境下会自动导致一个事务回滚。
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