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https://issues.apache.org/jira/browse/TINKERPOP-1948?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stephen mallette updated TINKERPOP-1948:
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Affects Version/s: 3.3.2
> Sum-step should work on properties of type 'Duration'.
> ------------------------------------------------------
>
> Key: TINKERPOP-1948
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1948
> Project: TinkerPop
> Issue Type: Improvement
> Affects Versions: 3.3.2
> Reporter: Daniel Weber
> Priority: Minor
>
> Consider the following query:
> {code:java}
> g.inject(_P1, _P2).sum()
> {code}
> where _P1 and _P2 are bound to values of type 'gx:Duration' (Graphson).
> This will fail with the following error message:
> {code:java}
> [WARN] AbstractEvalOpProcessor - Exception processing a script on request
> [RequestMessage{, requestId=c3e3b3c1-a0dd-4029-b0b6-f7650f6866b3, op='eval',
> processor='', args={gremlin=g.inject(_P1, _P2).sum(), bindings={_P1=PT1S,
> _P2=PT2S}}}].
> java.lang.ClassCastException: java.time.Duration cannot be cast to
> java.lang.Number
> at
> org.apache.tinkerpop.gremlin.process.traversal.step.map.SumGlobalStep.projectTraverser(SumGlobalStep.java:52)
> at
> org.apache.tinkerpop.gremlin.process.traversal.step.map.SumGlobalStep.projectTraverser(SumGlobalStep.java:37)
> at
> org.apache.tinkerpop.gremlin.process.traversal.step.util.ReducingBarrierStep.processAllStarts(ReducingBarrierStep.java:84)
> at
> org.apache.tinkerpop.gremlin.process.traversal.step.util.ReducingBarrierStep.processNextStart(ReducingBarrierStep.java:113)
> at
> org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep.hasNext(AbstractStep.java:143)
> at
> org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal.hasNext(DefaultTraversal.java:192)
> at
> org.apache.tinkerpop.gremlin.server.op.AbstractOpProcessor.handleIterator(AbstractOpProcessor.java:89)
> at
> org.apache.tinkerpop.gremlin.server.op.AbstractEvalOpProcessor.lambda$evalOpInternal$5(AbstractEvalOpProcessor.java:252)
> at
> org.apache.tinkerpop.gremlin.groovy.engine.GremlinExecutor.lambda$eval$0(GremlinExecutor.java:274)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {code}
> This is obviously due to the fact that the Sum-steps expects its arguments to
> be of type Number, which Duration obviously is not. Since summation of
> Durations is easily available through [this
> method|[https://docs.oracle.com/javase/8/docs/api/java/time/Duration.html#plus-java.time.Duration-]]
> it's worth consideration. The feature would save us an ugly roundtrip by
> saving longs since in some of our queries, we use sum().
>
>
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