Steps to Reproduce:
I try to execute the following query on https://query.wikidata.org/ :
SELECT distinct ?id ?lang ?n
WHERE {
{
?id rdfs:label|skos:altLabel "Paris"@en .
BIND("EN" AS ?lang)
}
UNION
{
?id rdfs:label|skos:altLabel "Paris"@eu .
BIND("EU" AS ?lang)
}
?id wikibase:statements ?n .
}Actual Results:
Query timeout
Expected Results:
No timeout
Additional information:
In the following similar cases the query executes successfuly:
Removing the UNION (with the second condition):
SELECT distinct ?id ?lang ?n
WHERE {
{
?id rdfs:label|skos:altLabel "Paris"@en .
BIND("EN" AS ?lang)
}
?id wikibase:statements ?n .
}Removing the BIND statements:
SELECT distinct ?id ?n
WHERE {
{
?id rdfs:label|skos:altLabel "Paris"@en .
}
UNION
{
?id rdfs:label|skos:altLabel "Paris"@eu .
}
?id wikibase:statements ?n .
}Removing the "wikibase:statements" statement:
SELECT distinct ?id ?lang ?n
WHERE {
{
?id rdfs:label|skos:altLabel "Paris"@en .
BIND("EN" AS ?lang)
}
UNION
{
?id rdfs:label|skos:altLabel "Paris"@eu .
BIND("EU" AS ?lang)
}
}