Details
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Bug
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Status: Closed
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Major
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Resolution: Fixed
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Jena 3.0.1
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None
Description
A NotImplemented exception is thrown in 3.0.1-SNAPSHOT for queries that contain a subquery with order by/limit (i.e. TopN).
See unit test testTopN in attachment for example.
Example query that fails:
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX app: <http://example.org/> select * where { { select * where { ?id rdfs:label ?label . } order by ASC(?label) limit 5 } ?id a app:Entity . }
org.apache.jena.atlas.lib.NotImplemented at org.apache.jena.sparql.engine.main.VarFinder$VarUsageVisitor.no(VarFinder.java:320) at org.apache.jena.sparql.engine.main.VarFinder$VarUsageVisitor.visit(VarFinder.java:333) at org.apache.jena.sparql.algebra.op.OpTopN.visit(OpTopN.java:50) at org.apache.jena.sparql.engine.main.VarFinder$VarUsageVisitor.apply(VarFinder.java:81) at org.apache.jena.sparql.engine.main.VarFinder.<init>(VarFinder.java:68) at org.apache.jena.sparql.engine.main.JoinClassifier.check(JoinClassifier.java:91) at org.apache.jena.sparql.engine.main.JoinClassifier.isLinear(JoinClassifier.java:66) at org.apache.jena.sparql.engine.main.JoinClassifier.isLinear(JoinClassifier.java:38) at org.apache.jena.sparql.algebra.optimize.TransformJoinStrategy.transform(TransformJoinStrategy.java:39) at org.apache.jena.sparql.algebra.TransformWrapper.transform(TransformWrapper.java:71) at org.apache.jena.sparql.algebra.op.OpJoin.apply(OpJoin.java:75) at org.apache.jena.sparql.algebra.Transformer$ApplyTransformVisitor.visit2(Transformer.java:366) at org.apache.jena.sparql.algebra.OpVisitorByType.visit(OpVisitorByType.java:80) at org.apache.jena.sparql.algebra.op.OpJoin.visit(OpJoin.java:78) at org.apache.jena.sparql.algebra.OpWalker$WalkerVisitor.visit2(OpWalker.java:107) at org.apache.jena.sparql.algebra.OpVisitorByType.visit(OpVisitorByType.java:80) at org.apache.jena.sparql.algebra.op.OpJoin.visit(OpJoin.java:78) at org.apache.jena.sparql.algebra.OpWalker.walk(OpWalker.java:43) at org.apache.jena.sparql.algebra.OpWalker.walk(OpWalker.java:38) at org.apache.jena.sparql.algebra.Transformer.applyTransformation(Transformer.java:147) at org.apache.jena.sparql.algebra.Transformer.transformation(Transformer.java:140) at org.apache.jena.sparql.algebra.Transformer.transformation(Transformer.java:129) at org.apache.jena.sparql.algebra.Transformer.transformation(Transformer.java:123) at org.apache.jena.sparql.algebra.Transformer.transform(Transformer.java:56) at org.apache.jena.sparql.algebra.Transformer.transformSkipService(Transformer.java:86) at org.apache.jena.sparql.algebra.Transformer.transformSkipService(Transformer.java:68) at org.apache.jena.sparql.algebra.optimize.Optimize.apply(Optimize.java:277) at org.apache.jena.sparql.algebra.optimize.Optimize.rewrite(Optimize.java:212) at org.apache.jena.sparql.algebra.optimize.Optimize.optimize(Optimize.java:78) at org.apache.jena.sparql.algebra.Algebra.optimize(Algebra.java:65) at org.apache.jena.sparql.engine.main.QueryEngineMain.modifyOp(QueryEngineMain.java:67) at org.apache.jena.sparql.engine.QueryEngineBase.createPlan(QueryEngineBase.java:101) at org.apache.jena.sparql.engine.QueryEngineBase.getPlan(QueryEngineBase.java:87) at org.apache.jena.sparql.engine.main.QueryEngineMain$QueryEngineMainFactory.create(QueryEngineMain.java:91) at org.apache.jena.sparql.engine.QueryExecutionBase.getPlan(QueryExecutionBase.java:578) at org.apache.jena.sparql.engine.QueryExecutionBase.startQueryIterator(QueryExecutionBase.java:522) at org.apache.jena.sparql.engine.QueryExecutionBase.execResultSet(QueryExecutionBase.java:563) at org.apache.jena.sparql.engine.QueryExecutionBase.execSelect(QueryExecutionBase.java:183) at arq.TestSubQueryTopN.testTopN(TestSubQueryTopN.java:135) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)