Github user sun-rui commented on the pull request:
https://github.com/apache/spark/pull/9680#issuecomment-157973061
adding all character overload for DataFrame functions in a different JIRA
is OK.
But for alias of corr(), #9366 only supports inter-column cov and cor of a
DataFrame, not between columns of two DataFrames. I think actually it is better
to add alias in this PR. corr() operating on two columns is similar to R cor()
on two vectors.
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