Github user ChengXiangLi commented on a diff in the pull request:
https://github.com/apache/flink/pull/1255#discussion_r44124427
--- Diff:
flink-optimizer/src/main/java/org/apache/flink/optimizer/plan/Channel.java ---
@@ -134,6 +134,10 @@ public Channel(PlanNode sourceNode, TempMode tempMode)
{
public PlanNode getSource() {
return this.source;
}
+
+ public void setSource(PlanNode source) {
--- End diff --
Create new channels means that we need to update the input channel existing
`PlanNode`, there is no interface to set input channel in `PlanNode` as well.
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