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Posted to issues@spark.apache.org by "Ted Yu (JIRA)" <ji...@apache.org> on 2015/10/28 11:46:27 UTC

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

Ted Yu created SPARK-11371:
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             Summary: Make "mean" an alias for "avg" operator
                 Key: SPARK-11371
                 URL: https://issues.apache.org/jira/browse/SPARK-11371
             Project: Spark
          Issue Type: Improvement
            Reporter: Ted Yu
            Priority: Minor


>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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