[18:26:56] <anomie>	 WTF, why do we not have an index on rc_this_oldid and instead ApiQueryContributions, DifferenceEngine, and RevDelRevisionItem all hack around it by joining on rc_timestamp (and in one case rc_user_text)?
[18:27:55] <anomie>	 I think r25538 failed to work. ;)
[18:32:54] <anomie>	 Filed T179199.
[18:32:56] <stashbot>	 T179199: Add an index on rc_this_oldid - https://phabricator.wikimedia.org/T179199