[GitHub] [spark] gatorsmile commented on pull request #28377: [SPARK-27340][SS][2.4] Alias on TimeWindow expression may cause watermark metadata lost

gatorsmile commented on pull request #28377: URL: https://github.com/apache/spark/pull/28377#issuecomment-620301600 Any other Expressions except `NamedExpression` has the field Metadata? This is an automated message from the

[GitHub] [spark] gatorsmile commented on pull request #28377: [SPARK-27340][SS][2.4] Alias on TimeWindow expression may cause watermark metadata lost

gatorsmile commented on pull request #28377: URL: https://github.com/apache/spark/pull/28377#issuecomment-620296526 @dongjoon-hyun @holdenk My understanding is different from what you said above. It sounds like the metadata is not available for TimeWindow expression when we