Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/3127
I am a bit skeptical about the special case handling or Row in the type
exatractor there.
Why specifically support row and not other types? To me, Row does not seem
like a most common type to be put into the collection inputs that it needs such
special case handling.
Also, this does not detect if the different rows have conflicting types in
the columns (such as `row1[x] = int, row2[x] = String).
What do you think about simply improving how to generate a row type info
(similar as we did with `TypeHint` for other types)? Then
`StreamExecutionEnvironment.fromCollection(rows, type)` should work quite well.
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