[Wikidata-bugs] [Maniphest] [Created] T206539: Odd Wikidata timeout

[Pietro]

Pietro created this task. Pietro added a project: Wikidata. Restricted Application added a subscriber: Aklapper.

TASK DESCRIPTION

Using the following query on a small dataset (libraries in an Italian region) I got a timeout

SELECT DISTINCT ?item WHERE {

?item (wdt:P131/wdt:P131*) wd:Q1284.
?item (wdt:P31/wdt:P279*) wd:Q7075.

}

but the query works using named subquery

SELECT ?item with 

{ select ?item where

{
  ?item (wdt:P131/wdt:P131*) wd:Q1284.
 }

} as %i where

{

include %i

?item (wdt:P31/wdt:P279*) wd:Q7075.

}

or a different region

SELECT DISTINCT ?item WHERE {

?item (wdt:P131/wdt:P131*) wd:Q1279.
?item (wdt:P31/wdt:P279*) wd:Q7075.

}

Is it a bug?

Thanks, Pietro

TASK DETAIL

https://phabricator.wikimedia.org/T206539

EMAIL PREFERENCES

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To: Pietro
Cc: Aklapper, Pietro, Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, LawExplorer, Wikidata-bugs, aude, Mbch331

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