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https://issues.apache.org/jira/browse/FLINK-33182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17771868#comment-17771868
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Timo Walther commented on FLINK-33182:
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[~lincoln.86xy] do you agree with this assumption?
> Allow metadata columns in NduAnalyzer with ChangelogNormalize
> -------------------------------------------------------------
>
> Key: FLINK-33182
> URL: https://issues.apache.org/jira/browse/FLINK-33182
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Reporter: Timo Walther
> Priority: Major
>
> Currently, the NduAnalyzer is very strict about metadata columns in updating
> sources. However, for upsert sources (like Kafka) that contain an incomplete
> changelog, the planner always adds a ChangelogNormalize node.
> ChangelogNormalize will make sure that metadata columns can be considered
> deterministic. So the NduAnalyzer should be satisfied in this case.
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