Github user fhueske commented on a diff in the pull request: https://github.com/apache/flink/pull/2562#discussion_r81957188 --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/api/table/plan/logical/operators.scala --- @@ -497,3 +501,95 @@ case class LogicalRelNode( override def validate(tableEnv: TableEnvironment): LogicalNode = this } + +case class WindowAggregate( + groupingExpressions: Seq[Expression], + window: LogicalWindow, + aggregateExpressions: Seq[NamedExpression], + child: LogicalNode) + extends UnaryNode { + + override def output: Seq[Attribute] = { + (groupingExpressions ++ aggregateExpressions) map { + case ne: NamedExpression => ne.toAttribute + case e => Alias(e, e.toString).toAttribute + } + } + + override def resolveReference( --- End diff -- please add inline comments to make the code easier to follow
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