The database should be able to distinguish the transactions performed by the middle tier for its own purpose, from those performed by the middle tier on behalf of some users.
对于中间层自身执行的事务与中间层代表某些用户执行的事务，数据库应该能够加以区分。
The database should be able to distinguish the transactions performed by the middle tier for its own purpose, from those performed by the middle tier on behalf of some users.
对于中间层自身执行的事务与中间层代表某些用户执行的事务，数据库应该能够加以区分。
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