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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. Author: tedyu <yuzhihong@gmail.com> Closes #9332 from ted-yu/master. |
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