Pietro updated the task description. (Show Details)

CHANGES TO 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:P31/wdt:P279*) wd:Q7075.
}

but the query works using named subquery

SELECT ?item with
{ select ?item where
...
}
} as %i where
{
include %i
?item (wdt:P31/wdt:P279*) wd:Q7075.
}

or a different region

SELECT DISTINCT ?item WHERE {
...
?item (wdt:P31/wdt:P279*) wd:Q7075.
}
...

TASK DETAIL
https://phabricator.wikimedia.org/T206539

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