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From "Takeshi Yamamuro (Jira)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-27978) Add built-in Aggregate Functions: string_agg
Date Sun, 29 Dec 2019 05:29:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-27978?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Takeshi Yamamuro updated SPARK-27978:
-------------------------------------
    Parent Issue: SPARK-30375  (was: SPARK-27764)

> Add built-in Aggregate Functions: string_agg
> --------------------------------------------
>
>                 Key: SPARK-27978
>                 URL: https://issues.apache.org/jira/browse/SPARK-27978
>             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||
> |string_agg(_{{expression}}_,_{{delimiter}}_)|({{text}}, {{text}}) or ({{bytea}}, {{bytea}})|same
as argument types|No|input values concatenated into a string, separated by delimiter|
> https://www.postgresql.org/docs/current/functions-aggregate.html
> We can workaround it by concat_ws(_{{delimiter}}_, collect_list(_{{expression}}_)) currently.



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