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https://issues.apache.org/jira/browse/SPARK-27974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17457522#comment-17457522
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jiaan.geng commented on SPARK-27974:
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I will take a look!
> Add built-in Aggregate Function: array_agg
> ------------------------------------------
>
> Key: SPARK-27974
> URL: https://issues.apache.org/jira/browse/SPARK-27974
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Yuming Wang
> Priority: Major
>
> ||Function||Argument Type(s)||Return Type||Partial Mode||Description||
> |{{array_agg(_{{expression}}_)}}|any non-array type|array of the argument
> type|No|input values, including nulls, concatenated into an array|
> |{{array_agg(_{{expression}}_)}}|any array type|same as argument data
> type|No|input arrays concatenated into array of one higher dimension (inputs
> must all have same dimensionality, and cannot be empty or NULL)|
> https://www.postgresql.org/docs/11/functions-aggregate.html
> Other DBs:
> https://docs.teradata.com/reader/kmuOwjp1zEYg98JsB8fu_A/Xffi_w_BZeSoaXg6Fd76Qw
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