wuchong commented on a change in pull request #9208:
[FLINK-13378][table-planner-blink] Fix bug: Blink-planner not support
SingleValueAggFunction
URL: https://github.com/apache/flink/pull/9208#discussion_r306745490
##########
File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/expressions/call.scala
##########
@@ -221,3 +221,21 @@ case class PlannerTableFunctionCall(
override def toString =
s"${tableFunction.getClass.getCanonicalName}(${parameters.mkString(", ")})"
}
+
+case class ThrowException(msg: PlannerExpression, tp: TypeInformation[_])
extends UnaryExpression {
+
+ override private[flink] def resultType = tp
+
+ override private[flink] def child = msg
Review comment:
nit: declare return types explicitly `child: PlannerExpression`
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