[Wikidata-bugs] [Maniphest] [Commented On] T254482: SERVICE bd:sample fail in case 0 result

2020-06-04 Thread Lucas_Werkmeister_WMDE 
Lucas_Werkmeister_WMDE added a comment.


  This only seems to happen for entities/IRIs that exist, but are never used in 
a predicate position.
  
# KO test case
ASK {
  SERVICE bd:sample { ?item wd:Q1 ?value. }
}
  
  
  
# OK test case
ASK {
  SERVICE bd:sample { ?item wd:Q0 ?value. }
}

TASK DETAIL
  https://phabricator.wikimedia.org/T254482

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To: Lucas_Werkmeister_WMDE
Cc: Lucas_Werkmeister_WMDE, Manu1400, Aklapper, CBogen, darthmon_wmde, Nandana, 
Namenlos314, Lahi, Gq86, GoranSMilovanovic, QZanden, EBjune, merbst, 
LawExplorer, _jensen, rosalieper, Scott_WUaS, Jonas, Xmlizer, jkroll, 
Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
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[Wikidata-bugs] [Maniphest] [Commented On] T254482: SERVICE bd:sample fail in case 0 result

2020-06-04 Thread Manu1400 
Manu1400 added a comment.


  Reduced test cases:
  
# OK test case
SELECT * {
  SERVICE bd:sample { ?item wdt:P31 ?value. bd:serviceParam bd:sample.limit 
1 }
}
  
  
  
# KO test case
SELECT * {
  SERVICE bd:sample { ?item wdt:P8027 ?value. bd:serviceParam 
bd:sample.limit 1 }
}

TASK DETAIL
  https://phabricator.wikimedia.org/T254482

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To: Manu1400
Cc: Manu1400, Aklapper, CBogen, darthmon_wmde, Nandana, Namenlos314, Lahi, 
Gq86, Lucas_Werkmeister_WMDE, GoranSMilovanovic, QZanden, EBjune, merbst, 
LawExplorer, _jensen, rosalieper, Scott_WUaS, Jonas, Xmlizer, jkroll, 
Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
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