Major Description
See also https://github.com/apache/calcite/pull/317. This seems to be related to visiting subqueries without accounting for the fact that they might push multiple constancys on the stack.
The assertion error I'm getting in my code is from the sql,
SELECT * FROM s.foo
WHERE (dim1, dim2) IN (
SELECT dim1, dim2 FROM (
SELECT dim1, dim2
FROM s.foo
GROUP BY dim1, dim2
)
)
and the stack trace is,
java.lang.AssertionError: Internal error: Error while applying rule ReduceExpressionsRule(Filter), args [rel#8:LogicalFilter.NONE.[](input=rel#7:Subset#0.NONE.[],condition=IN($2, $3, {
LogicalProject(DIM1=[$0], DIM2=[$1])
LogicalAggregate(group=[{0, 1}])
LogicalProject(DIM1=[$2], DIM2=[$3])
DruidQueryRel(dataSource=[foo])
}))]
at org.apache.calcite.util.Util.newInternal(Util.java:792)
at org.apache.calcite.plan.volcano.VolcanoRuleCall.onMatch(VolcanoRuleCall.java:236)
at org.apache.calcite.plan.volcano.VolcanoPlanner.findBestExp(VolcanoPlanner.java:819)
at org.apache.calcite.tools.Programs$5.run(Programs.java:300)
at org.apache.calcite.tools.Programs$SequenceProgram.run(Programs.java:351)
at org.apache.calcite.prepare.Prepare.optimize(Prepare.java:153)
at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:287)
at org.apache.calcite.prepare.Prepare.prepareSql(Prepare.java:193)
at org.apache.calcite.prepare.CalcitePrepareImpl.prepare2_(CalcitePrepareImpl.java:734)
at org.apache.calcite.prepare.CalcitePrepareImpl.prepare_(CalcitePrepareImpl.java:597)
at org.apache.calcite.prepare.CalcitePrepareImpl.prepareSql(CalcitePrepareImpl.java:567)
at org.apache.calcite.jdbc.CalciteConnectionImpl.parseQuery(CalciteConnectionImpl.java:215)
at org.apache.calcite.jdbc.CalciteMetaImpl.prepareAndExecute(CalciteMetaImpl.java:594)
at org.apache.calcite.avatica.AvaticaConnection.prepareAndExecuteInternal(AvaticaConnection.java:613)
at org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:139)
at org.apache.calcite.avatica.AvaticaStatement.executeQuery(AvaticaStatement.java:208)
at io.druid.sql.calcite.table.DruidTableTest.testQuery(DruidTableTest.java:1800)
at io.druid.sql.calcite.table.DruidTableTest.testUsingSubqueryAsFilterOnTwoColumns(DruidTableTest.java:1715)
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: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.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
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$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.AssertionError
at org.apache.calcite.rel.rules.ReduceExpressionsRule$ReducibleExprLocator.analyze(ReduceExpressionsRule.java:924)
at org.apache.calcite.rel.rules.ReduceExpressionsRule.findReducibleExps(ReduceExpressionsRule.java:603)
at org.apache.calcite.rel.rules.ReduceExpressionsRule.reduceExpressionsInternal(ReduceExpressionsRule.java:492)
at org.apache.calcite.rel.rules.ReduceExpressionsRule.reduceExpressions(ReduceExpressionsRule.java:462)
at org.apache.calcite.rel.rules.ReduceExpressionsRule$FilterReduceExpressionsRule.onMatch(ReduceExpressionsRule.java:149)
at org.apache.calcite.plan.volcano.VolcanoRuleCall.onMatch(VolcanoRuleCall.java:213)
... 45 more