Github user concretevitamin commented on the pull request:
https://github.com/apache/spark/pull/1211#issuecomment-47146951
Hi @edrevo -- thanks, the implementation looks really concise! I haven't
thought about this, but what do people think about instead of having syntax
like `AVG(key)`, we support something like `'key.avg`? One example in the
current code base is `asc` (the sort order). Also +@marmbrus.
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