[jira] [Updated] (SPARK-11371) Make "mean" an alias for "avg" operator

["Yin Huai (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-11371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yin Huai updated SPARK-11371:
-----------------------------
    Assignee: Ted Yu

> Make "mean" an alias for "avg" operator
> ---------------------------------------
>
>                 Key: SPARK-11371
>                 URL: https://issues.apache.org/jira/browse/SPARK-11371
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>            Priority: Minor
>             Fix For: 1.6.0
>
>         Attachments: spark-11371-v1.patch
>
>
> From Reynold in the thread 'Exception when using some aggregate operators'  (http://search-hadoop.com/m/q3RTt0xFr22nXB4/):
> I don't think these are bugs. The SQL standard for average is "avg", not "mean". Similarly, a distinct count is supposed to be written as "count(distinct col)", not "countDistinct(col)".
> We can, however, make "mean" an alias for "avg" to improve compatibility between DataFrame and SQL.



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