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https://issues.apache.org/jira/browse/FLINK-16205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17420779#comment-17420779
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Ingo Bürk commented on FLINK-16205:
-----------------------------------
This turns out to be incredibly tricky to implement correctly while still
handling nested calls properly. After an offline discussion, our current
"battle plan" will be to add a logical rule which finds these calls and wraps
the arguments into a synthetic function which prepares the operand's output so
that the actual aggregate function can just insert it as raw content.
> Support JSON_OBJECTAGG
> ----------------------
>
> Key: FLINK-16205
> URL: https://issues.apache.org/jira/browse/FLINK-16205
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / API
> Reporter: Zili Chen
> Assignee: Ingo Bürk
> Priority: Major
> Labels: auto-unassigned, pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
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