Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3851#discussion_r116592552
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/logical/operators.scala
---
@@ -584,13 +592,22 @@ case class WindowAggregate(
}
override def validate(tableEnv: TableEnvironment): LogicalNode = {
+ implicit val relBuilder: RelBuilder = tableEnv.getRelBuilder
val resolvedWindowAggregate =
super.validate(tableEnv).asInstanceOf[WindowAggregate]
val groupingExprs = resolvedWindowAggregate.groupingExpressions
val aggregateExprs = resolvedWindowAggregate.aggregateExpressions
aggregateExprs.foreach(validateAggregateExpression)
groupingExprs.foreach(validateGroupingExpression)
def validateAggregateExpression(expr: Expression): Unit = expr match {
+ case Alias(child, _, _) => validateAggregateExpression(child)
--- End diff --
Same comments as for `Aggregate` apply here.
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