| Change log entry 70873 | |
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| Processed by: | richwarm (2020-10-03 22:16:40 GMT) |
| Comment: |
<< review queue entry 67090 - submitted by 'sl89' >> 【Wikipedia】 In database technologies, a rollback is an operation which returns the database to some previous state. Rollbacks are important for database integrity, because they mean that the database can be restored to a clean copy even after erroneous operations are performed. They are crucial for recovering from database server crashes; by rolling back any transaction which was active at the time of the crash, the database is restored to a consistent state. 回滚（英語：rollback）是数据库技术中的操作，放弃修改，使数据库状态恢复到此前的某个时刻。这对数据完整性具有关键意义。回滚是数据库事务管理重要一環。 回滚特性通常用数据库日志实现，但也可以用多版本并发控制实现。 https://zh.wikipedia.org/wiki/%E5%9B%9E%E6%BB%BE 事务日志存储为连续的磁盘文件(有时存储在原始分区中)，并且一般只是用于写入而不用于读取，回滚或恢复的情况例外。 The transaction log is stored as a sequential disk file (or sometimes in a raw partition) and will generally only be written to, not read from, except in the case of rollback or recovery. 这种设置允许应用程序更加容易地提交或回滚对对象图的任何更改。 This setup allows the application to more easily commit or rollback any changes to an object graph. 如果有任何订购项没有得到满足，过程将回滚该订单条目。 If any ordered item cannot be fulfilled, the procedure rolls back the order entry. Dirty read— One transaction reads changes made by another transaction that hasn't yet been committed. This is very dangerous, because those changes might later be rolled back. 脏读取－个事务开始读取了某行数据，但是另外一个事务已经更新了此数据但没有能够及时提交。这是相当危险的，因为很可能所有的操作都可能会被回滚。 --------------------------------------- Editor: 击球扎实者才能使球停留果岭，否则白球容易滑动回滚。 分為左右兩邊一低一高的球道，往右邊打的球都會順著地形回滾至左邊球道。 以P桿開球，球凌空越過旗位落地，然後再順著斜坡回滾至洞內， ... 所谓“魔鬼回旋球”，也叫“零式发球”，是让乒乓球在发出后“不出台”，反而向球网回滚的急下旋发球。这种球过网高度低，前冲性小，下旋强烈，一般的反胶选手很容易“扎网吃球”。 |
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# 回滾 回滚 [hui2 gun3] /(computing) to roll back /rollback/ + 回滾 回滚 [hui2 gun3] /(computing) to roll back/rollback/(sports) (of a ball) to roll back/to bounce back due to backspin/ |