[jira] [Comment Edited] (FLINK-21949) Support collect to array aggregate function

["Roland Johann (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-21949?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17709755#comment-17709755 ] 

Roland Johann edited comment on FLINK-21949 at 4/7/23 6:50 PM:
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Is someone working on this one? If someone can provide moderate guidance I can support to implement it.

Especially how to implement aggregate functions that accept table aliases as argument is something I din't figure out yet.


was (Author: rolandjohann):
Is someone working on this one? If someone can provide moderate guidance I can support to implement it.

> Support collect to array aggregate function
> -------------------------------------------
>
>                 Key: FLINK-21949
>                 URL: https://issues.apache.org/jira/browse/FLINK-21949
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / API
>    Affects Versions: 1.12.0
>            Reporter: Jiabao Sun
>            Priority: Minor
>
> Some nosql databases like mongodb and elasticsearch support nested data types.
> Aggregating multiple rows into ARRAY<ROW> is a common requirement.
> The CollectToArray function is similar to Collect, except that it returns ARRAY<ROW> instead of MULTISET<ROW>.



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