Github user twalthr commented on the issue:
https://github.com/apache/flink/pull/2938
Thanks for working on this @wuchong! The code looks very good. I haven"t
reviewed the code entirely but tried to verify if batch and stream queries
return the same result. Unfortunately, this is not the case at the moment.
I converted the stream test
`org.apache.flink.api.scala.stream.table.AggregationsITCase#testEventTimeTumblingWindow`
and your batch test
`org.apache.flink.api.scala.batch.table.AggregationsITCase#testEventTimeTumblingGroupWindowOverTime`
but the aggregations are different.
Could you have a look at it?
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