[jira] [Updated] (FLINK-20747) ClassCastException when using MAX aggregate function

["Xintong Song (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-20747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xintong Song updated FLINK-20747:
---------------------------------
    Fix Version/s:     (was: 1.12.1)
                   1.12.2

> ClassCastException when using MAX aggregate function
> ----------------------------------------------------
>
>                 Key: FLINK-20747
>                 URL: https://issues.apache.org/jira/browse/FLINK-20747
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Planner
>    Affects Versions: 1.12.0
>            Reporter: zengjinbo
>            Priority: Critical
>             Fix For: 1.13.0, 1.12.2
>
>         Attachments: image-2020-12-23-18-04-21-079.png
>
>
> During the process of upgrading 1.12.0, I found that Flink SQL 1.11.1  is not compatible 
> java.lang.ClassCastException: java.lang.Integer cannot be cast to org.apache.flink.table.data.StringDatajava.lang.ClassCastException: java.lang.Integer cannot be cast to org.apache.flink.table.data.StringData at org$apache$flink$table$planner$functions$aggfunctions$MaxWithRetractAggFunction$MaxWithRetractAccumulator$Converter.toInternal(Unknown Source) at org.apache.flink.table.data.conversion.StructuredObjectConverter.toInternal(StructuredObjectConverter.java:92) at org.apache.flink.table.data.conversion.StructuredObjectConverter.toInternal(StructuredObjectConverter.java:47) at org.apache.flink.table.data.conversion.DataStructureConverter.toInternalOrNull(DataStructureConverter.java:59) at GroupAggsHandler$875.getAccumulators(Unknown Source) at org.apache.flink.table.runtime.operators.aggregate.GroupAggFunction.processElement(GroupAggFunction.java:175) at org.apache.flink.table.runtime.operators.aggregate.GroupAggFunction.processElement(GroupAggFunction.java:45) at org.apache.flink.streaming.api.operators.KeyedProcessOperator.processElement(KeyedProcessOperator.java:85) at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:193) at org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.processElement(StreamTaskNetworkInput.java:179) at org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.emitNext(StreamTaskNetworkInput.java:152) at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:67) at org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:372) at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:186) at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:575) at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:539) at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:722) at org.apache.flink.runtime.taskmanager.Task.run(Task.java:547)
>  
>  
> !image-2020-12-23-18-04-21-079.png!



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