[Wikidata-bugs] [Maniphest] [Updated] T213213: Duplicate normalized triples for values

[Smalyshev]

Smalyshev added subscribers: WMDE-leszek, thiemowmde, Addshore. Smalyshev added a comment.

This seems to be a consequence of T167759: Reference hash is not stable - a lot of duplicates can be seen in:

SELECT * WHERE { 
  ?x wikibase:quantityNormalized ?v1 .
  ?x wikibase:quantityNormalized ?v2 .
  ?v1 wikibase:quantityAmount ?q1 .
  ?v2 wikibase:quantityAmount ?q2 .
  FILTER(?v1 != ?v2) .
  FILTER(?q1 = ?q2) .
} LIMIT 200

produces a lot of values which have same amounts but different hashes. I am not sure what to do with it or why it happens.

@Addshore @WMDE-leszek @thiemowmde do you have any idea why hashes are changing again? Can we do anything about it - it produces broken data now and I don't see any way to fix it on WDQS side.

TASK DETAIL

https://phabricator.wikimedia.org/T213213

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To: Smalyshev
Cc: Addshore, thiemowmde, WMDE-leszek, Aklapper, Smalyshev, Nandana, Lahi, Gq86, Lucas_Werkmeister_WMDE, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, _jensen, D3r1ck01, Jonas, Xmlizer, jkroll, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331

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