[GitHub] [spark] xuanyuanking commented on a change in pull request #28326: [SPARK-27340][SS] Alias on TimeWindow expression cause watermark metadata lost

xuanyuanking commented on a change in pull request #28326: URL: https://github.com/apache/spark/pull/28326#discussion_r416475211 ## File path: sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamingJoinSuite.scala ## @@ -991,4 +991,30 @@ class StreamingOuterJoinSuite

[GitHub] [spark] xuanyuanking commented on a change in pull request #28326: [SPARK-27340][SS] Alias on TimeWindow expression cause watermark metadata lost

xuanyuanking commented on a change in pull request #28326: URL: https://github.com/apache/spark/pull/28326#discussion_r416419173 ## File path: sql/core/src/main/scala/org/apache/spark/sql/Column.scala ## @@ -1040,17 +1034,11 @@ class Column(val expr: Expression) extends