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https://issues.apache.org/jira/browse/FLINK-24054?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17408828#comment-17408828
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Timo Walther commented on FLINK-24054:
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[~ykt836] sorry, I saw you comment to late. I just marked it as a blocker to
fix it in this release that also introduced the SinkUpsertMaterializer. In the
end, as you can see in the PR, the changes required were minimal.
> Let SinkUpsertMaterializer emit +U instead of only +I
> -----------------------------------------------------
>
> Key: FLINK-24054
> URL: https://issues.apache.org/jira/browse/FLINK-24054
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Runtime
> Reporter: Timo Walther
> Assignee: Timo Walther
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.14.0
>
>
> Currently, {{SinkUpsertMaterializer}} is not able to emit +U's but will
> always emit +I's. Thus, resulting changelogs are incorrect strictly speaking
> and only valid when treating +U and +I as similar changes in downstream
> operators.
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