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?

-- 
Daniel Kinzler
Principal Platform Engineer

Wikimedia Deutschland
Gesellschaft zur Förderung Freien Wissens e.V.

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