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Flink Jira Bot updated FLINK-22455: ----------------------------------- Labels: auto-deprioritized-major stale-minor (was: auto-deprioritized-major) I am the [Flink Jira Bot|https://github.com/apache/flink-jira-bot/] and I help the community manage its development. I see this issues has been marked as Minor but is unassigned and neither itself nor its Sub-Tasks have been updated for 180 days. I have gone ahead and marked it "stale-minor". If this ticket is still Minor, please either assign yourself or give an update. Afterwards, please remove the label or in 7 days the issue will be deprioritized. > FlinkRelBuilder#windowAggregate will throw ClassCastException when function > reuse > --------------------------------------------------------------------------------- > > Key: FLINK-22455 > URL: https://issues.apache.org/jira/browse/FLINK-22455 > Project: Flink > Issue Type: Bug > Components: Table SQL / Planner > Reporter: tartarus > Priority: Minor > Labels: auto-deprioritized-major, stale-minor > Attachments: FlinkRelBuilderTest.scala > > > If the input parameter aggCalls of FlinkRelBuilder#windowAggregate contains > the same aggregate function. Then it will throw ClassCastException, because > of the optimization of aggregate function reuse. We did not judge the return > value type, but direct type conversion; > {code:java} > val aggregate = super.transform( > new UnaryOperator[RelBuilder.Config] { > override def apply(t: RelBuilder.Config) > : RelBuilder.Config = t.withPruneInputOfAggregate(false) > }) > .push(build()) > .aggregate(groupKey, aggCalls) > .build() > .asInstanceOf[LogicalAggregate] > {code} > I wrote a test that triggered this problem. > You can use the attached code to reproduce this problem. -- This message was sent by Atlassian Jira (v8.20.1#820001)