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Posted to issues@spark.apache.org by "Alexander Hagerf (Jira)" <ji...@apache.org> on 2019/12/04 23:22:00 UTC

[jira] [Commented] (SPARK-30131) Add array_median function

    [ https://issues.apache.org/jira/browse/SPARK-30131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16988289#comment-16988289 ] 

Alexander Hagerf commented on SPARK-30131:
------------------------------------------

Created PR for this issue: [https://github.com/apache/spark/pull/26762]

> Add array_median function
> -------------------------
>
>                 Key: SPARK-30131
>                 URL: https://issues.apache.org/jira/browse/SPARK-30131
>             Project: Spark
>          Issue Type: New Feature
>          Components: SQL
>    Affects Versions: 2.4.4
>            Reporter: Alexander Hagerf
>            Priority: Minor
>             Fix For: 3.0.0
>
>
> It is known that there isn't any exact median function in Spark SQL, and this might be a difficult problem to solve efficiently. However, to find the median for an array should be a simple task, and something that users can utilize when collecting numeric values to a list or set.
>  
> This can already be achieved by using sorting and choosing element, but can get cumbersome and if a fully tested function is provided in the API, I think it can solve some headache for many.



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