EnricoMi commented on pull request #33545:
URL: https://github.com/apache/spark/pull/33545#issuecomment-888082838
@HyukjinKwon `get` now returns the Scala Map, `getAsRow` is removed. I would
still like to keep `getAsJavaMap` as it simplifies usage in Java (see
JavaDatasetSuite.java`.
There is one issue with returning a `Map` though: The map will lose some
metrics when the aggregation expressions have duplicate column names:
> df.observe(observation, lit(1).as("a"), lit(2).as("a")).count
> observation.get
Map(a -> 2)
Should I add some prefix to the duplicate column names?
Map(a_1 -> 1, a_2 -> 2)
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