Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3743#discussion_r112459590
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/ProjectionTranslator.scala
---
@@ -190,8 +190,8 @@ object ProjectionTranslator {
def expandProjectList(
--- End diff --
I would not change the `expandProjectList()` method which has a dedicated
purpose.
Instead, I would add a new method to `ProjectionTranslator`, which just
translates the over windows:
```
def translateOverWindows(
exprs: Seq[Expression],
overWindows: Array[OverWindow]): Seq[Expression]
```
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