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https://issues.apache.org/jira/browse/FLINK-24532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17443633#comment-17443633
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lincoln lee commented on FLINK-24532:
-------------------------------------

[~twalthr] Could you give a specific case for this issue?I checked the 
ChangelogNormalize implementation, it produces a  +D row  when input is

-U or +D, so I can't get your problem, a specific case may helps.

> Invalid deletions for time-versioned join with ChangelogNormalize
> -----------------------------------------------------------------
>
>                 Key: FLINK-24532
>                 URL: https://issues.apache.org/jira/browse/FLINK-24532
>             Project: Flink
>          Issue Type: Bug
>          Components: Table SQL / Planner, Table SQL / Runtime
>            Reporter: Timo Walther
>            Priority: Critical
>
> ChangelogNormalize replaces a +D row with a -U row derived from the previous 
> inserted row. This means that the rowtime column is reset to the insertion 
> time. In this case, a downstream time-versioned join produces an invalid 
> result as a deletion is applied immediately instead of the original deletion 
> timestamp.



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