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https://issues.apache.org/jira/browse/FLINK-11013?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16702606#comment-16702606
]
ASF GitHub Bot commented on FLINK-11013:
----------------------------------------
dianfu commented on issue #7181: [FLINK-11013] [table] Fix distinct aggregates
for group window in Table API
URL: https://github.com/apache/flink/pull/7181#issuecomment-442674317
@walterddr Thanks a lot for your review. The comments make sense to me and
have updated accordingly.
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> Fix distinct aggregates for group window in Table API
> -----------------------------------------------------
>
> Key: FLINK-11013
> URL: https://issues.apache.org/jira/browse/FLINK-11013
> Project: Flink
> Issue Type: Bug
> Components: Table API & SQL
> Affects Versions: 1.6.2
> Reporter: Dian Fu
> Assignee: Dian Fu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.8.0
>
>
> Currently distinct aggregates does not work on group window in Table API.
> For the following query:
> {code:java}
> val table = util.addTable[(Int, Long, String)](
> "MyTable",
> 'a, 'b, 'c, 'proctime.proctime, 'rowtime.rowtime)
> val result = table
> .window(Tumble over 15.minute on 'rowtime as 'w)
> .groupBy('w)
> .select('a.count.distinct, 'a.sum)
> {code}
> The following exception will be thrown:
> {code:java}
> org.apache.flink.table.api.ValidationException: It's not allowed to use an
> aggregate function as input of another aggregate function
> at
> org.apache.flink.table.plan.logical.LogicalNode.failValidation(LogicalNode.scala:156)
> at
> org.apache.flink.table.plan.logical.WindowAggregate$$anonfun$org$apache$flink$table$plan$logical$WindowAggregate$$validateAggregateExpression$2$1$$anonfun$apply$3.apply(operators.scala:643)
> at
> org.apache.flink.table.plan.logical.WindowAggregate$$anonfun$org$apache$flink$table$plan$logical$WindowAggregate$$validateAggregateExpression$2$1$$anonfun$apply$3.apply(operators.scala:641)
> at org.apache.flink.table.plan.TreeNode.preOrderVisit(TreeNode.scala:82)
> at
> org.apache.flink.table.plan.logical.WindowAggregate$$anonfun$org$apache$flink$table$plan$logical$WindowAggregate$$validateAggregateExpression$2$1.apply(operators.scala:641)
> at
> org.apache.flink.table.plan.logical.WindowAggregate$$anonfun$org$apache$flink$table$plan$logical$WindowAggregate$$validateAggregateExpression$2$1.apply(operators.scala:640)
> at scala.collection.immutable.List.foreach(List.scala:392)
> at
> org.apache.flink.table.plan.logical.WindowAggregate.org$apache$flink$table$plan$logical$WindowAggregate$$validateAggregateExpression$2(operators.scala:640)
> at
> org.apache.flink.table.plan.logical.WindowAggregate$$anonfun$org$apache$flink$table$plan$logical$WindowAggregate$$validateAggregateExpression$2$4.apply(operators.scala:654)
> at
> org.apache.flink.table.plan.logical.WindowAggregate$$anonfun$org$apache$flink$table$plan$logical$WindowAggregate$$validateAggregateExpression$2$4.apply(operators.scala:654)
> at scala.collection.immutable.List.foreach(List.scala:392)
> at
> org.apache.flink.table.plan.logical.WindowAggregate.org$apache$flink$table$plan$logical$WindowAggregate$$validateAggregateExpression$2(operators.scala:654)
> at
> org.apache.flink.table.plan.logical.WindowAggregate$$anonfun$validate$12.apply(operators.scala:628)
> at
> org.apache.flink.table.plan.logical.WindowAggregate$$anonfun$validate$12.apply(operators.scala:628)
> at scala.collection.immutable.List.foreach(List.scala:392)
> at
> org.apache.flink.table.plan.logical.WindowAggregate.validate(operators.scala:628)
> at org.apache.flink.table.api.WindowGroupedTable.select(table.scala:1206)
> at
> org.apache.flink.table.api.stream.table.DistinctAggregateTest.testDistinctAggregateOnTumbleWindow(DistinctAggregateTest.scala:60)
> 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$1.runReflectiveCall(FrameworkMethod.java:50)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at
> org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:239)
> 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$2.evaluate(ParentRunner.java:268)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
> at
> com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
> at
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237)
> at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
> {code}
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