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Posted to issues@spark.apache.org by "Takeshi Yamamuro (Jira)" <ji...@apache.org> on 2019/12/29 05:29:00 UTC
[jira] [Updated] (SPARK-27978) Add built-in Aggregate Functions:
string_agg
[ 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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