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https://issues.apache.org/jira/browse/FLINK-13562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16899355#comment-16899355
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godfrey he commented on FLINK-13562:
------------------------------------
i would like to fix this
> throws exception when FlinkRelMdColumnInterval meets two stage stream group
> aggregate
> -------------------------------------------------------------------------------------
>
> Key: FLINK-13562
> URL: https://issues.apache.org/jira/browse/FLINK-13562
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Reporter: godfrey he
> Priority: Major
> Fix For: 1.9.0, 1.10.0
>
>
> test case:
> {code:scala}
> @Test
> def testTwoDistinctAggregateWithNonDistinctAgg(): Unit = {
> util.addTableSource[(Int, Long, String)]("MyTable", 'a, 'b, 'c)
> util.verifyPlan("SELECT c, SUM(DISTINCT a), SUM(a), COUNT(DISTINCT b)
> FROM MyTable GROUP BY c")
> }
> {code}
> org.apache.flink.table.api.TableException: Sum aggregate function does not
> support type: ''VARCHAR''.
> Please re-check the data type.
> at
> org.apache.flink.table.planner.plan.utils.AggFunctionFactory.createSumAggFunction(AggFunctionFactory.scala:191)
> at
> org.apache.flink.table.planner.plan.utils.AggFunctionFactory.createAggFunction(AggFunctionFactory.scala:74)
> at
> org.apache.flink.table.planner.plan.utils.AggregateUtil$$anonfun$9.apply(AggregateUtil.scala:285)
> at
> org.apache.flink.table.planner.plan.utils.AggregateUtil$$anonfun$9.apply(AggregateUtil.scala:279)
> at
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at
> scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at
> scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
> at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
> at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
> at scala.collection.AbstractTraversable.map(Traversable.scala:104)
> at
> org.apache.flink.table.planner.plan.utils.AggregateUtil$.transformToAggregateInfoList(AggregateUtil.scala:279)
> at
> org.apache.flink.table.planner.plan.utils.AggregateUtil$.getOutputIndexToAggCallIndexMap(AggregateUtil.scala:154)
> at
> org.apache.flink.table.planner.plan.metadata.FlinkRelMdColumnInterval.getAggCallIndexInLocalAgg$1(FlinkRelMdColumnInterval.scala:504)
> at
> org.apache.flink.table.planner.plan.metadata.FlinkRelMdColumnInterval.estimateColumnIntervalOfAggregate(FlinkRelMdColumnInterval.scala:526)
> at
> org.apache.flink.table.planner.plan.metadata.FlinkRelMdColumnInterval.getColumnInterval(FlinkRelMdColumnInterval.scala:417)
> at GeneratedMetadataHandler_ColumnInterval.getColumnInterval_$(Unknown
> Source)
> at GeneratedMetadataHandler_ColumnInterval.getColumnInterval(Unknown
> Source)
> at
> org.apache.flink.table.planner.plan.metadata.FlinkRelMetadataQuery.getColumnInterval(FlinkRelMetadataQuery.java:122)
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