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https://issues.apache.org/jira/browse/CALCITE-1907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Julian Hyde resolved CALCITE-1907.
----------------------------------
Resolution: Fixed
Fix Version/s: 1.14.0
Fixed in http://git-wip-us.apache.org/repos/asf/calcite/commit/a473eca5.
> Table function with 1 column gives ClassCastException
> -----------------------------------------------------
>
> Key: CALCITE-1907
> URL: https://issues.apache.org/jira/browse/CALCITE-1907
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Fix For: 1.14.0
>
>
> If a table function has 1 column and is used under a Filter or Aggregate, the
> query gives ClassCastException when executed:
> {noformat}
> java.lang.RuntimeException: exception while executing [select *
> from table("s"."fibonacci"())]
> at
> org.apache.calcite.test.CalciteAssert$AssertQuery.returns(CalciteAssert.java:1270)
> at
> org.apache.calcite.test.CalciteAssert$AssertQuery.returns(CalciteAssert.java:1249)
> at
> org.apache.calcite.test.TableFunctionTest.testUserDefinedTableFunction6(TableFunctionTest.java:381)
> 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:51)
> at
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
> at
> com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
> Caused by: java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast
> to java.lang.Long
> at
> org.apache.calcite.avatica.util.AbstractCursor$LongAccessor.getLong(AbstractCursor.java:550)
> at
> org.apache.calcite.avatica.AvaticaResultSet.getLong(AvaticaResultSet.java:277)
> at
> org.apache.calcite.test.TableFunctionTest$1.apply(TableFunctionTest.java:387)
> at
> org.apache.calcite.test.TableFunctionTest$1.apply(TableFunctionTest.java:382)
> at
> org.apache.calcite.test.CalciteAssert.assertQuery(CalciteAssert.java:533)
> at
> org.apache.calcite.test.CalciteAssert$AssertQuery.returns(CalciteAssert.java:1266)
> {noformat}
> The cause is a slight difference what the enumerable to iterable converter
> requires (arrays if there is more than one column, scalars is there is 1
> column) and the specification of table functions (always return arrays).
> Up until now we have been masking the problem by applying "slice" to the
> output of table functions. Which is fine if the output goes straight into the
> JDBC result set, but not fine if there are other operators, such as Filter or
> Aggregate, downstream.
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