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https://issues.apache.org/jira/browse/FLINK-7491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16141348#comment-16141348
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ASF GitHub Bot commented on FLINK-7491:
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Github user wuchong commented on the issue:
https://github.com/apache/flink/pull/4585
Hi @suez1224 thanks for the PR, I think we can use `Array` instead of
`AbstractMultiSet`. `AbstractMultiSet` is too obscure for users. In that case,
we do not need the MultiSetSerilizer and MultiSetTypeInfo, also the following
queries can use UDF on the field with array type as the `evel(...)` parameters.
> Support COLLECT Aggregate function in Flink SQL
> -----------------------------------------------
>
> Key: FLINK-7491
> URL: https://issues.apache.org/jira/browse/FLINK-7491
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Shuyi Chen
> Assignee: Shuyi Chen
>
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