[Wikidata-bugs] [Maniphest] [Created] T143503: “java.lang.AssertionError: Non-required group has attached join filters” on combination of * paths, MINUS, and FILTER

[WikidataFacts]

WikidataFacts created this task. WikidataFacts added a project: Wikidata-Query-Service. Herald added a subscriber: Aklapper. Herald added projects: Wikidata, Discovery.

TASK DESCRIPTION

The following query results in an error:

SELECT * WHERE
{
  ?p wdt:P279* ?o.
  MINUS { ?o wdt:P279* []. }
  FILTER(?o != wd:Q1).
}

java.lang.AssertionError: Non-required group has attached join filters:

JoinGroupNode [minus] [joinVars=[o]] [projectInVars=[o]] {
  ArbitraryLengthPathNode(left=VarNode(o), right=VarNode(-anon-1)[anonymous]) {
    JoinGroupNode {
      StatementPatternNode(VarNode(-tVarLeft-08f3ef7c-76fd-43d4-bf3a-3d531e2a4678)[anonymous], ConstantNode(Vocab(6)[http://www.wikidata.org/prop/direct/P]:XSDUnsignedShort(279)), VarNode(-tVarRight-38013f88-8417-48aa-8184-d94fe183033c)[anonymous]) [scope=DEFAULT_CONTEXTS]
        AST2BOpBase.estimatedCardinality=1605100
        AST2BOpBase.originalIndex=POS
    } AST2BOpBase.estimatedCardinality=1605100
  } AST2BOpBase.estimatedCardinality=4611686018428993003
} JOIN ON (o)
  FILTER( FunctionNode(VarNode(o),ConstantNode(Vocab(2)[http://www.wikidata.org/entity/Q]:XSDUnsignedByte(1)))[ FunctionNode.scalarVals=null, FunctionNode.functionURI=http://www.w3.org/2005/xpath-functions#not-equal-to, valueExpr=com.bigdata.rdf.internal.constraints.CompareBOp(o,Vocab(2)[http://www.wikidata.org/entity/Q]:XSDUnsignedByte(1))[ CompareBOp.op=NE]] ) AST2BOpBase.estimatedCardinality=4611686018428993003

	at com.bigdata.rdf.sparql.ast.eval.AST2BOpUtility.addSubgroup(AST2BOpUtility.java:4210)
	at com.bigdata.rdf.sparql.ast.eval.AST2BOpUtility.convertJoinGroup(AST2BOpUtility.java:3272)
	at com.bigdata.rdf.sparql.ast.eval.AST2BOpUtility.convertJoinGroupOrUnion(AST2BOpUtility.java:2516)
	at com.bigdata.rdf.sparql.ast.eval.AST2BOpUtility.convertQueryBaseWithScopedVars(AST2BOpUtility.java:455)
	at com.bigdata.rdf.sparql.ast.eval.AST2BOpUtility.convert(AST2BOpUtility.java:286)
	at com.bigdata.rdf.sparql.ast.eval.ASTEvalHelper.optimizeQuery(ASTEvalHelper.java:426)
	at com.bigdata.rdf.sparql.ast.eval.ASTEvalHelper.evaluateTupleQuery(ASTEvalHelper.java:211)
	at com.bigdata.rdf.sail.BigdataSailTupleQuery.evaluate(BigdataSailTupleQuery.java:79)
	at com.bigdata.rdf.sail.BigdataSailTupleQuery.evaluate(BigdataSailTupleQuery.java:61)
	at org.openrdf.repository.sail.SailTupleQuery.evaluate(SailTupleQuery.java:75)
	at com.bigdata.rdf.sail.webapp.BigdataRDFContext$TupleQueryTask.doQuery(BigdataRDFContext.java:1679)
	at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.innerCall(BigdataRDFContext.java:1536)
	at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.call(BigdataRDFContext.java:1501)
	at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.call(BigdataRDFContext.java:714)
	... 4 more

Link to the query: https://query.wikidata.org/#SELECT%20%2a%20WHERE%0A%7B%0A%20%20%3Fp%20wdt%3AP279%2a%20%3Fo.%0A%20%20MINUS%20%7B%20%3Fo%20wdt%3AP279%2a%20%5B%5D.%20%7D%0A%20%20FILTER%28%3Fo%20%21%3D%20wd%3AQ1%29.%0A%7D

TASK DETAIL

https://phabricator.wikimedia.org/T143503

EMAIL PREFERENCES

https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: WikidataFacts
Cc: Aklapper, WikidataFacts, mschwarzer, Avner, debt, Gehel, D3r1ck01, Jonas, FloNight, Xmlizer, Izno, jkroll, Smalyshev, Wikidata-bugs, Jdouglas, aude, Deskana, Manybubbles, Mbch331

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