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https://issues.apache.org/jira/browse/FLINK-11983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17374905#comment-17374905
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Timo Walther commented on FLINK-11983:
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I removed FLINK-11493 as a parent. The issue itself is still valid.
> Refactor resolved aggregation reference expressions in blink
> ------------------------------------------------------------
>
> Key: FLINK-11983
> URL: https://issues.apache.org/jira/browse/FLINK-11983
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / API
> Reporter: Jingsong Lee
> Priority: Minor
>
> Expressions should be handled entirely in the API module.
> 1.ResolvedAggInputReference should be replaced by FieldReferenceExpression
> 2.ResolvedAggLocalReference and ResolvedDistinctKeyReference should be merged
> into one class: ResolvedLocalReference. And move to API module.
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