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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] [Updated] (SPARK-30131) Add array_median function

     [ https://issues.apache.org/jira/browse/SPARK-30131?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexander Hagerf updated SPARK-30131:
-------------------------------------
    Description: 
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.

  was:
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.


> 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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