Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3715#discussion_r125454546
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/join/WindowJoinUtil.scala
---
@@ -191,8 +166,10 @@ object JoinUtil {
/**
* analysis if condition term has time indicator
--- End diff --
```
Extracts all time indicator attributes that are accessed in an expression.
```
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