for a while now. This results in the following error at the start of execution :
000012: com.complexible.stardog.plan.eval.ExecutionException: Unable to translate expression
The query executes if the FILTER statements are outside of the optional statement; however, that is not what I want to query.... Any ideas? According to SPARQL Query Language for RDF, the syntax seems okay.
The syntax is OK indeed. What version of Stardog is this? We had a logging issue with 7.1 but later versions should put enough information in stardog.log located in your $STARDOG_HOME directory.
I don't see stardog.log inside the docker container. It is neither the working directory or the STARDOG_HOME directory. I'm guessing it should be there
INFO 2020-04-27 15:00:01,305 [main] com.complexible.stardog.cli.impl.ServerStart:call(243): Memory options
INFO 2020-04-27 15:00:01,305 [main] com.complexible.stardog.cli.impl.ServerStart:call(244): Memory mode: DEFAULT
INFO 2020-04-27 15:00:01,305 [main] com.complexible.stardog.cli.impl.ServerStart:call(245): Min Heap Size: 2.0G
INFO 2020-04-27 15:00:01,305 [main] com.complexible.stardog.cli.impl.ServerStart:call(246): Max Heap Size: 1.9G
INFO 2020-04-27 15:00:01,306 [main] com.complexible.stardog.cli.impl.ServerStart:call(247): Max Direct Mem: 1.5G
INFO 2020-04-27 15:00:01,306 [main] com.complexible.stardog.cli.impl.ServerStart:call(248): System Memory: 20G
There are then some logs related to the vg I add. The logs that appear after the failed query are:
WARN 2020-04-27 15:04:06,215 [stardog-user-4] com.complexible.stardog.protocols.http.server.StardogUndertowErrorHandler:accept(61): Unexpected exception was handled by the server
com.complexible.stardog.virtual.vega.UnsupportedTranslation: Unable to translate expression
at com.complexible.stardog.virtual.vega.ExprToRexNode.defaultVisit(ExprToRexNode.java:314) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.filter.BaseExpressionVisitor.visitWithArgs(BaseExpressionVisitor.java:45) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.filter.BaseExpressionVisitor.visit(BaseExpressionVisitor.java:201) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.ExprToRexNode.visit(ExprToRexNode.java:208) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.filter.functions.rdfterm.StrDt.accept(StrDt.java:59) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.ExprToRexNode.visit(ExprToRexNode.java:88) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.filter.expr.Compare.accept(Compare.java:108) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.ExprToRexNode.translateWithTermType(ExprToRexNode.java:329) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.ExprToRexNode.translate(ExprToRexNode.java:319) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.rdbms.LeftJoinTranslator.join(LeftJoinTranslator.java:98) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.rdbms.LeftJoinTranslator.translate(LeftJoinTranslator.java:167) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.rdbms.SqlVirtualTranslator.translate(SqlVirtualTranslator.java:308) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator$BinaryPlanNodeDispatcher.visitJoin(LocalFallbackTranslator.java:207) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visit(BasePlanNodeVisitor.java:93) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.NestedLoopJoinPlanNode.accept(NestedLoopJoinPlanNode.java:57) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator$BinaryPlanNodeDispatcher.translate(LocalFallbackTranslator.java:217) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.binaryVisit(LocalFallbackTranslator.java:256) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visitJoin(BasePlanNodeVisitor.java:88) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visit(BasePlanNodeVisitor.java:93) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.NestedLoopJoinPlanNode.accept(NestedLoopJoinPlanNode.java:57) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.lambda$visit$0(LocalFallbackTranslator.java:304) ~[stardog-virtual-core-7.2.1.jar:?]
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[?:1.8.0_252]
at com.google.common.collect.CollectSpliterators$1Splitr.tryAdvance(CollectSpliterators.java:155) ~[guava-27.0-jre.jar:?]
at java.util.Spliterator.forEachRemaining(Spliterator.java:326) ~[?:1.8.0_252]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) ~[?:1.8.0_252]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) ~[?:1.8.0_252]
at java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:313) ~[?:1.8.0_252]
at java.util.stream.Streams$ConcatSpliterator.forEachRemaining(Streams.java:743) ~[?:1.8.0_252]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) ~[?:1.8.0_252]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) ~[?:1.8.0_252]
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[?:1.8.0_252]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_252]
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:566) ~[?:1.8.0_252]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.streamUnion(LocalFallbackTranslator.java:321) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.visit(LocalFallbackTranslator.java:301) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.ScopeNodeImpl.accept(ScopeNodeImpl.java:112) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.unaryVisit(LocalFallbackTranslator.java:268) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visit(BasePlanNodeVisitor.java:134) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.FilterPlanNodeImpl.accept(FilterPlanNodeImpl.java:75) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.unaryVisit(LocalFallbackTranslator.java:268) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visit(BasePlanNodeVisitor.java:134) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.FilterPlanNodeImpl.accept(FilterPlanNodeImpl.java:75) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.unaryVisit(LocalFallbackTranslator.java:268) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visit(BasePlanNodeVisitor.java:225) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.ProjectionPlanNodeImpl.accept(ProjectionPlanNodeImpl.java:207) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.unaryVisit(LocalFallbackTranslator.java:268) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visit(BasePlanNodeVisitor.java:217) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.SlicePlanNodeImpl.accept(SlicePlanNodeImpl.java:103) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.rdbms.RdbmsVirtualGraph.translate(RdbmsVirtualGraph.java:117) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.VirtualGraphService.translate(VirtualGraphService.java:128) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.service.LogicalServiceQuery.toPhysicalQuery(LogicalServiceQuery.java:67) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.service.ServiceTranslator$ServiceTranslatorVisitor.transform(ServiceTranslator.java:99) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.visit(TransformingPlanNodeVisitor.java:1001) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.ServicePlanNodeImpl.accept(ServicePlanNodeImpl.java:91) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.unaryVisit(TransformingPlanNodeVisitor.java:667) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.unaryTransform(TransformingPlanNodeVisitor.java:98) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.transform(TransformingPlanNodeVisitor.java:405) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.visit(TransformingPlanNodeVisitor.java:913) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.ProjectionPlanNodeImpl.accept(ProjectionPlanNodeImpl.java:207) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.transform(TransformingPlanNodeVisitor.java:83) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.service.ServiceTranslator.optimize(ServiceTranslator.java:41) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.optimizer.OptimizationPipeline.execute(OptimizationPipeline.java:119) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.ExecutablePlanFactory.optimizePlan(ExecutablePlanFactory.java:152) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.ExecutablePlanFactory.lambda$null$0(ExecutablePlanFactory.java:117) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.cache.SimplePlanCache.get(SimplePlanCache.java:102) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.ExecutablePlanFactory.lambda$createOptimized$1(ExecutablePlanFactory.java:117) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.index.IndexUtils.doInTx(IndexUtils.java:156) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.ExecutablePlanFactory.createOptimized(ExecutablePlanFactory.java:110) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.QueryEngine.getExecutablePlan(QueryEngine.java:516) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.QueryEngine.getExecutablePlan(QueryEngine.java:452) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.QueryEngine.executeSelect(QueryEngine.java:302) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.query.DefaultQueryFactory$TupleQuery.execute(DefaultQueryFactory.java:198) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.query.DefaultQueryFactory$TupleQuery.execute(DefaultQueryFactory.java:184) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.protocols.http.server.ProtocolUtils.executeReadQuery(ProtocolUtils.java:547) ~[stardog-protocols-http-server-7.2.1.jar:?]
at com.complexible.stardog.protocols.http.server.ProtocolUtils.executeReadQuery(ProtocolUtils.java:523) ~[stardog-protocols-http-server-7.2.1.jar:?]
at com.complexible.stardog.protocols.http.server.SPARQLProtocol.executeQuery(SPARQLProtocol.java:135) ~[stardog-protocols-http-server-7.2.1.jar:?]
at com.complexible.stardog.protocols.http.server.SPARQLProtocol.post(SPARQLProtocol.java:95) ~[stardog-protocols-http-server-7.2.1.jar:?]
at com.stardog.http.server.undertow.jaxrs.ExtractRoutes.lambda$handleIt$5(ExtractRoutes.java:192) ~[stardog-protocols-http-server-7.2.1.jar:?]
at org.apache.shiro.subject.support.SubjectRunnable.doRun(SubjectRunnable.java:120) [shiro-core-1.3.0.jar:1.3.0] at org.apache.shiro.subject.support.SubjectRunnable.run(SubjectRunnable.java:108) [shiro-core-1.3.0.jar:1.3.0]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_252]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_252]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_252]
Thanks for sharing the log details. In the future, please use three backticks to format pastes. It's much easier to read.
The exception stems from the presence of function StrDt in the optional's filter. We have created ticket #8987 for this issue. Additionally, FILTER EXISTS is currently not supported in virtual graph queries.
WARN 2020-04-27 21:44:30,639 [stardog-user-4] com.complexible.stardog.protocols.http.server.StardogUndertowErrorHandler:accept(61): Unexpected exception was handled by the server
com.complexible.stardog.virtual.vega.UnsupportedTranslation: Unable to translate expression
at com.complexible.stardog.virtual.vega.ExprToRexNode.defaultVisit(ExprToRexNode.java:314) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.filter.BaseExpressionVisitor.visitWithArgs(BaseExpressionVisitor.java:45) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.filter.BaseExpressionVisitor.visit(BaseExpressionVisitor.java:169) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.filter.functions.cast.DateTimeCast.accept(DateTimeCast.java:105) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.ExprToRexNode.visit(ExprToRexNode.java:88) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.filter.expr.Compare.accept(Compare.java:108) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.ExprToRexNode.visit(ExprToRexNode.java:104) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.filter.expr.And.accept(And.java:52) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.ExprToRexNode.translateWithTermType(ExprToRexNode.java:329) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.ExprToRexNode.translate(ExprToRexNode.java:319) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.rdbms.LeftJoinTranslator.join(LeftJoinTranslator.java:98) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.rdbms.LeftJoinTranslator.translate(LeftJoinTranslator.java:167) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.rdbms.SqlVirtualTranslator.translate(SqlVirtualTranslator.java:308) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator$BinaryPlanNodeDispatcher.visitJoin(LocalFallbackTranslator.java:207) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visit(BasePlanNodeVisitor.java:93) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.NestedLoopJoinPlanNode.accept(NestedLoopJoinPlanNode.java:57) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator$BinaryPlanNodeDispatcher.translate(LocalFallbackTranslator.java:217) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.binaryVisit(LocalFallbackTranslator.java:256) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visitJoin(BasePlanNodeVisitor.java:88) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visit(BasePlanNodeVisitor.java:93) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.NestedLoopJoinPlanNode.accept(NestedLoopJoinPlanNode.java:57) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.unaryVisit(LocalFallbackTranslator.java:268) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visit(BasePlanNodeVisitor.java:134) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.FilterPlanNodeImpl.accept(FilterPlanNodeImpl.java:75) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.unaryVisit(LocalFallbackTranslator.java:268) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visit(BasePlanNodeVisitor.java:225) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.ProjectionPlanNodeImpl.accept(ProjectionPlanNodeImpl.java:207) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.LocalFallbackTranslator.unaryVisit(LocalFallbackTranslator.java:268) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.BasePlanNodeVisitor.visit(BasePlanNodeVisitor.java:217) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.SlicePlanNodeImpl.accept(SlicePlanNodeImpl.java:103) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.virtual.vega.rdbms.RdbmsVirtualGraph.translate(RdbmsVirtualGraph.java:117) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.virtual.VirtualGraphService.translate(VirtualGraphService.java:128) ~[stardog-virtual-core-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.service.LogicalServiceQuery.toPhysicalQuery(LogicalServiceQuery.java:67) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.service.ServiceTranslator$ServiceTranslatorVisitor.transform(ServiceTranslator.java:99) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.visit(TransformingPlanNodeVisitor.java:1001) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.ServicePlanNodeImpl.accept(ServicePlanNodeImpl.java:91) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.unaryVisit(TransformingPlanNodeVisitor.java:667) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.unaryTransform(TransformingPlanNodeVisitor.java:98) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.transform(TransformingPlanNodeVisitor.java:405) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.visit(TransformingPlanNodeVisitor.java:913) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.ProjectionPlanNodeImpl.accept(ProjectionPlanNodeImpl.java:207) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.TransformingPlanNodeVisitor.transform(TransformingPlanNodeVisitor.java:83) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.service.ServiceTranslator.optimize(ServiceTranslator.java:41) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.optimizer.OptimizationPipeline.execute(OptimizationPipeline.java:119) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.ExecutablePlanFactory.optimizePlan(ExecutablePlanFactory.java:152) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.ExecutablePlanFactory.lambda$null$0(ExecutablePlanFactory.java:117) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.cache.SimplePlanCache.get(SimplePlanCache.java:102) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.ExecutablePlanFactory.lambda$createOptimized$1(ExecutablePlanFactory.java:117) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.index.IndexUtils.doInTx(IndexUtils.java:156) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.ExecutablePlanFactory.createOptimized(ExecutablePlanFactory.java:110) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.QueryEngine.getExecutablePlan(QueryEngine.java:516) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.QueryEngine.getExecutablePlan(QueryEngine.java:452) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.plan.eval.QueryEngine.executeSelect(QueryEngine.java:302) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.query.DefaultQueryFactory$TupleQuery.execute(DefaultQueryFactory.java:198) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.query.DefaultQueryFactory$TupleQuery.execute(DefaultQueryFactory.java:184) ~[stardog-7.2.1.jar:?]
at com.complexible.stardog.protocols.http.server.ProtocolUtils.executeReadQuery(ProtocolUtils.java:547) ~[stardog-protocols-http-server-7.2.1.jar:?]
at com.complexible.stardog.protocols.http.server.ProtocolUtils.executeReadQuery(ProtocolUtils.java:523) ~[stardog-protocols-http-server-7.2.1.jar:?]
at com.complexible.stardog.protocols.http.server.SPARQLProtocol.executeQuery(SPARQLProtocol.java:135) ~[stardog-protocols-http-server-7.2.1.jar:?]
at com.complexible.stardog.protocols.http.server.SPARQLProtocol.post(SPARQLProtocol.java:95) ~[stardog-protocols-http-server-7.2.1.jar:?]
at com.stardog.http.server.undertow.jaxrs.ExtractRoutes.lambda$handleIt$5(ExtractRoutes.java:192) ~[stardog-protocols-http-server-7.2.1.jar:?]
at org.apache.shiro.subject.support.SubjectRunnable.doRun(SubjectRunnable.java:120) [shiro-core-1.3.0.jar:1.3.0]
at org.apache.shiro.subject.support.SubjectRunnable.run(SubjectRunnable.java:108) [shiro-core-1.3.0.jar:1.3.0]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_252]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_252]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_252]
I did not get an error message when running queries with just FILTER EXISTS clause. If this is not supported for virtual graphs, and especially if I am going to get the wrong data or no data, shouldn't there be an error message informing me of this?