通过使用乐观并发控制，数据库管理器在完成读操作之后可以立即释放行或页锁。
With optimistic concurrency control, the database manager releases the row or page locks immediately after a read operation.
该事务没有确认，因为至少一个资源管理器里的乐观并发控制失败。
The transaction failed to commit due to the failure of optimistic concurrency control in at least one of the resource managers.
该事务没有确认，因为至少一个资源管理器里的乐观并发控制失败。
The transaction failed to commit due to the failure of optimistic concurrency control in at least one of the resource managers.
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