Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3040#discussion_r104727744
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/nodes/dataset/DataSetJoin.scala
---
@@ -199,10 +200,21 @@ class DataSetJoin(
val joinOpName = s"where: ($joinConditionToString), join:
($joinSelectionToString)"
+ //consider all fields not which are not keys are forwarded
+ val leftIndices = (0 until
left.getRowType.getFieldCount).diff(leftKeys)
+ val fieldsLeft = getForwardedInput(leftDataSet.getType, returnType,
leftIndices)
+
+ val rightIndices = (0 until right.getRowType.getFieldCount)
+ .diff(rightKeys)
--- End diff --
Keys can be forwarded
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