JingsongLi commented on a change in pull request #9006:
[FLINK-13107][table-planner-blink] Copy TableApi IT and UT to Blink planner
URL: https://github.com/apache/flink/pull/9006#discussion_r300897138
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File path:
flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/expressions/aggregations.scala
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@@ -57,7 +58,10 @@ case class Sum(child: PlannerExpression) extends
Aggregation {
override private[flink] def children: Seq[PlannerExpression] = Seq(child)
override def toString = s"sum($child)"
- override private[flink] def resultType = child.resultType
+ override private[flink] def resultType = {
Review comment:
> [FLINK-13107][table-planner-blink] Fix bug when infer resultType of some
PlannerExpression.
[FLINK-13107][table-planner-blink] Derive sum, avg, div return type in
planner expressions using behavior of blink ?
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