If a global variable is created within a session, then it cannot be used by other sessions until the unit of work has committed.
如果全局变量是在会话内创建，则其他会话不能使用它，除非已经提交了这个工作单元。
If a global variable is created within a session, then it cannot be used by other sessions until the unit of work has committed.
如果全局变量是在会话内创建，则其他会话不能使用它，除非已经提交了这个工作单元。
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