change log set

[akiradeveloper]

When shifting multiple lines with range+> or <, the undoing will undo the change line by line, no atomically. The natural behavior should be undoing atomically. Obviously we need a concept like change log set which is namely a set of change log which is undoable at once.

The change log set is, in database context, kind of transaction which contains multiple change set which is able to revert atomically later.