[jira] [Created] (FLINK-3842) Fix handling null record/row in generated code

["Dawid Wysakowicz (JIRA)" <ji...@apache.org>]

Dawid Wysakowicz created FLINK-3842:
---------------------------------------

             Summary: Fix handling null record/row in generated code
                 Key: FLINK-3842
                 URL: https://issues.apache.org/jira/browse/FLINK-3842
             Project: Flink
          Issue Type: Bug
          Components: Table API
            Reporter: Dawid Wysakowicz


Handling null record/rows is needed to implement features like outer joins.
Right know an exception is thrown:

{code}
org.apache.flink.runtime.client.JobExecutionException: Job execution failed.

	at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply$mcV$sp(JobManager.scala:807)
	at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply(JobManager.scala:753)
	at org.apache.flink.runtime.jobmanager.JobManager$$anonfun$handleMessage$1$$anonfun$applyOrElse$7.apply(JobManager.scala:753)
	at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
	at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
	at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41)
	at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:401)
	at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
	at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
	at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
	at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
Caused by: java.lang.NullPointerException
	at DataSetJoinRule$54.join(Unknown Source)
	at org.apache.flink.api.table.runtime.FlatJoinRunner.join(FlatJoinRunner.scala:48)
	at org.apache.flink.runtime.operators.hash.NonReusingBuildSecondHashJoinIterator.callWithNextKey(NonReusingBuildSecondHashJoinIterator.java:152)
	at org.apache.flink.runtime.operators.AbstractOuterJoinDriver.run(AbstractOuterJoinDriver.java:154)
	at org.apache.flink.runtime.operators.BatchTask.run(BatchTask.java:480)
	at org.apache.flink.runtime.operators.BatchTask.invoke(BatchTask.java:345)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:579)
	at java.lang.Thread.run(Thread.java:745)


java.lang.NullPointerException
	at DataSetJoinRule$116.join(Unknown Source)
	at org.apache.flink.api.table.runtime.FlatJoinRunner.join(FlatJoinRunner.scala:48)
	at org.apache.flink.api.common.operators.base.OuterJoinOperatorBase.executeOnCollections(OuterJoinOperatorBase.java:113)
	at org.apache.flink.api.common.operators.CollectionExecutor.executeBinaryOperator(CollectionExecutor.java:280)
	at org.apache.flink.api.common.operators.CollectionExecutor.execute(CollectionExecutor.java:149)
	at org.apache.flink.api.common.operators.CollectionExecutor.executeUnaryOperator(CollectionExecutor.java:220)
	at org.apache.flink.api.common.operators.CollectionExecutor.execute(CollectionExecutor.java:146)
	at org.apache.flink.api.common.operators.CollectionExecutor.execute(CollectionExecutor.java:128)
	at org.apache.flink.api.common.operators.CollectionExecutor.executeDataSink(CollectionExecutor.java:179)
	at org.apache.flink.api.common.operators.CollectionExecutor.execute(CollectionExecutor.java:155)
	at org.apache.flink.api.common.operators.CollectionExecutor.execute(CollectionExecutor.java:128)
	at org.apache.flink.api.common.operators.CollectionExecutor.execute(CollectionExecutor.java:112)
	at org.apache.flink.api.java.CollectionEnvironment.execute(CollectionEnvironment.java:35)
	at org.apache.flink.test.util.CollectionTestEnvironment.execute(CollectionTestEnvironment.java:47)
	at org.apache.flink.test.util.CollectionTestEnvironment.execute(CollectionTestEnvironment.java:42)
	at org.apache.flink.api.scala.ExecutionEnvironment.execute(ExecutionEnvironment.scala:638)
	at org.apache.flink.api.scala.DataSet.collect(DataSet.scala:546)
	at org.apache.flink.api.scala.table.test.JoinITCase.testLeftJoinWithMultipleKeys(JoinITCase.scala:291)
	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:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.junit.runners.Suite.runChild(Suite.java:127)
	at org.junit.runners.Suite.runChild(Suite.java:26)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:119)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)
	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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
{code}



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