[
https://issues.apache.org/jira/browse/JENA-1041?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Andy Seaborne reassigned JENA-1041:
-----------------------------------
Assignee: Andy Seaborne
> NotImplemented Exception in OptTopN
> -----------------------------------
>
> Key: JENA-1041
> URL: https://issues.apache.org/jira/browse/JENA-1041
> Project: Apache Jena
> Issue Type: Bug
> Components: ARQ
> Affects Versions: Jena 3.0.1
> Reporter: Stephen Allen
> Assignee: Andy Seaborne
> Attachments: TestSubQueryTopN.java
>
>
> 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:
> {code}
> 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 .
> }
> {code}
> {code}
> 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)
> {code}
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