[
https://issues.apache.org/jira/browse/SPARK-6548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14743959#comment-14743959
]
Jihong MA commented on SPARK-6548:
----------------------------------
[~davies]please fix the assignee to Jihong, Thanks!
> stddev_pop and stddev_samp aggregate functions
> ----------------------------------------------
>
> Key: SPARK-6548
> URL: https://issues.apache.org/jira/browse/SPARK-6548
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Reynold Xin
> Labels: DataFrame, starter
> Fix For: 1.6.0
>
>
> Add it to the list of aggregate functions:
> https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/functions.scala
> Also add it to
> https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/GroupedData.scala
> We can either add a Stddev Catalyst expression, or just compute it using
> existing functions like here:
> https://github.com/apache/spark/commit/5bbcd1304cfebba31ec6857a80d3825a40d02e83#diff-c3d0394b2fc08fb2842ff0362a5ac6c9R776
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
