Hi, all.
I tried calling two consecutive orderBy for a Table, but got an exception.
Can anyone explain why this happens?
In my mind, orderBy should be able to be called by any Tables. But obviously,
it is not with no explanation.
Here is a simplified version of code:
Table table = btenv.scan("source").orderBy("cola");
table.insertInto("sink");
Table table2 = table.orderBy("colb");
table2.insertInto("sink2");btenv.execute("testest");
The exception is as follows:
java.lang.NullPointerException
at
org.apache.flink.optimizer.dag.SingleInputNode.computeInterestingPropertiesForInputs(SingleInputNode.java:224)
at
org.apache.flink.optimizer.traversals.InterestingPropertyVisitor.preVisit(InterestingPropertyVisitor.java:51)
at
org.apache.flink.optimizer.traversals.InterestingPropertyVisitor.preVisit(InterestingPropertyVisitor.java:29)
at
org.apache.flink.optimizer.dag.SingleInputNode.accept(SingleInputNode.java:513)
at
org.apache.flink.optimizer.dag.SingleInputNode.accept(SingleInputNode.java:515)
at
org.apache.flink.optimizer.dag.SingleInputNode.accept(SingleInputNode.java:515)
at
org.apache.flink.optimizer.dag.SingleInputNode.accept(SingleInputNode.java:515)
at
org.apache.flink.optimizer.dag.SingleInputNode.accept(SingleInputNode.java:515)
at
org.apache.flink.optimizer.dag.SingleInputNode.accept(SingleInputNode.java:515)
at org.apache.flink.optimizer.dag.DataSinkNode.accept(DataSinkNode.java:248)
at org.apache.flink.optimizer.dag.TwoInputNode.accept(TwoInputNode.java:751)
at org.apache.flink.optimizer.Optimizer.compile(Optimizer.java:493)
at org.apache.flink.optimizer.Optimizer.compile(Optimizer.java:399)
at
org.apache.flink.test.util.TestEnvironment.compileProgram(TestEnvironment.java:132)
at org.apache.flink.test.util.TestEnvironment.execute(TestEnvironment.java:105)
at
org.apache.flink.table.api.internal.BatchTableEnvImpl.execute(BatchTableEnvImpl.scala:225)
at
com.alibaba.alink.operator.batch.dataproc.SqlBatchOpsTest.testOrderBy(SqlBatchOpsTest.java:306)
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:498)
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.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
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: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$2.evaluate(ParentRunner.java:268)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at
com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
at
com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at
com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53)
