Otherwise transaction recovery (rollback) would not be possible, because the redo needed to undo a change is always in the same redo record as the redo for the change itself.

否则交易复苏（回滚）将是不可能的，因为重做需要撤消改变总是在同一重做的重做记录的变化本身。

youdao

Otherwise transaction recovery (rollback) would not be possible, because the redo needed to undo a change is always in the same redo record as the redo for the change itself.

否则交易复苏（回滚）将是不可能的，因为重做需要撤消改变总是在同一重做的重做记录的变化本身。

youdao