[jira] [Updated] (CALCITE-3278) Simplify the use to translate RexNode to Expression for evaluating

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-3278?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated CALCITE-3278:
------------------------------------
    Labels: pull-request-available  (was: )

> Simplify the use to translate RexNode to Expression for evaluating
> ------------------------------------------------------------------
>
>                 Key: CALCITE-3278
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3278
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>            Reporter: Wang Yanlin
>            Priority: Minor
>              Labels: pull-request-available
>
>  The method *forAggregation* of *RexToLixTranslator*  is designed to work for translating aggregate functions, with some parameters that we actually do not need, if we just want to translate a single RexNode. 
> We lack a more common sense function to get an instance of RexToLixTranslator. 
> And, the translated expression is a *ParameterExpression*, not fit for evaluating. When evaluating, we get an exception like this
> {code:java}
> java.lang.RuntimeException: parameter v not on stack
> 	at org.apache.calcite.linq4j.tree.Evaluator.peek(Evaluator.java:51)
> 	at org.apache.calcite.linq4j.tree.ParameterExpression.evaluate(ParameterExpression.java:55)
> 	at org.apache.calcite.linq4j.tree.GotoStatement.evaluate(GotoStatement.java:97)
> 	at org.apache.calcite.linq4j.tree.BlockStatement.evaluate(BlockStatement.java:83)
> 	at org.apache.calcite.linq4j.tree.Evaluator.evaluate(Evaluator.java:55)
> 	at org.apache.calcite.linq4j.tree.FunctionExpression.lambda$compile$0(FunctionExpression.java:87)
> 	at org.apache.calcite.adapter.enumerable.RexToLixTranslatorTest.testRawTranslateRexNode(RexToLixTranslatorTest.java:57)
> 	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.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$2.evaluate(ParentRunner.java:268)
> 	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> 	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> 	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
> 	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
> 	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
> 	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
> {code}



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