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