Github user fhueske commented on the pull request:
https://github.com/apache/flink/commit/629015fbff477f8a20d2142094e4015f4520e80b#commitcomment-15909895
In
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/plan/functions/AggregateFunction.scala:
In
flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/plan/functions/AggregateFunction.scala
on line 65:
`groupingKeys` hold only the field indicies of the grouping keys, not the
actual values. You need to do something like `outValue.setField(i,
currentValue.getField(groupingKeys(i))`. For that you need to remember one
input row (first or last doesn't matter, all have the same values in the
grouping fields).
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