The hint:Prior optimization on the property path might help a bit?
https://www.wikidata.org/wiki/Wikidata:SPARQL_query_service/query_optimizati...
Jeff
From: Thad Guidry thadguidry@gmail.com Date: Friday, October 29, 2021 at 10:12 AM To: David Causse dcausse@wikimedia.org, Discussion list for the Wikidata project. wikidata@lists.wikimedia.org, stevenliuyi@gmail.com stevenliuyi@gmail.com Subject: [External] [Wikidata] Help make this Property Query faster Hi David and team,
In Yi Liu's tool, Wikidata Property Explorer, I noticed that the query performance could be better ideally. Currently the query takes about 9 seconds and I'm asking if there might be anything to help reduce that considerably? Refactoring query for optimization, backend changes, anything you can think of Davd?
SELECT DISTINCT ?prop ?label ?desc ?type (GROUP_CONCAT(DISTINCT ?alias; SEPARATOR = " | ") AS ?aliases) WHERE { ?prop (wdt:P31/(wdt:P279*)) wd:Q18616576; wikibase:propertyType ?type. OPTIONAL { ?prop rdfs:label ?label. FILTER((LANG(?label)) = "en") } OPTIONAL { ?prop schema:description ?desc. FILTER((LANG(?desc)) = "en") } OPTIONAL { ?prop skos:altLabel ?alias. FILTER((LANG(?alias)) = "en") } } GROUP BY ?prop ?label ?desc ?type Thad https://www.linkedin.com/in/thadguidry/https://www.linkedin.com/in/thadguidry/ https://calendly.com/thadguidry/https://calendly.com/thadguidry/