Am 04.06.2018 um 20:54 schrieb Leon Ziemba:
... the size differences shown on the history and contributions pages,
which is the only thing that rev_parent_id is used for
This may be true in MediaWiki but not so much for external tools. I just wanted to preemptively say this. I'll be joining the IRC discussion to share more :)
Excellent, thank you! It would be particularly interesting to know what assumptions you make about the semantics of rev_parent_id. E.g. there are three revisions, A, B, and C, and revision B gets romoved - what should revision C's parent be?
Similarly, when revision X gets imported and inserted between A and B, what should revision B's parent be?