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https://issues.apache.org/jira/browse/FLINK-15803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17163358#comment-17163358
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Timo Walther commented on FLINK-15803:
--------------------------------------

Fixed in 1.12.0:
{code}
4f93dc575cb7f8f6f9586d9e92ea10316e00bced
[FLINK-15803][table] Unify validation for all kinds of UDFs
{code}

> Expose the new type inference for aggregate functions
> -----------------------------------------------------
>
>                 Key: FLINK-15803
>                 URL: https://issues.apache.org/jira/browse/FLINK-15803
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / API, Table SQL / Planner
>            Reporter: Timo Walther
>            Assignee: Timo Walther
>            Priority: Major
>              Labels: pull-request-available
>
> This will allow to use aggregate functions with the new type inference. It 
> requires different changes through the stack. This should be implemented 
> after we have support for structured types. It also includes a long-term 
> solution for the concept of DataViews with the new type system.



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