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https://issues.apache.org/jira/browse/FLINK-26457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17503313#comment-17503313
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Jingsong Lee commented on FLINK-26457:
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[~jark] Yes, it is partial update.
> Introduce Join Accumulator for Wide table
> -----------------------------------------
>
> Key: FLINK-26457
> URL: https://issues.apache.org/jira/browse/FLINK-26457
> Project: Flink
> Issue Type: Sub-task
> Components: Table Store
> Reporter: Jingsong Lee
> Priority: Major
> Fix For: table-store-0.1.0
>
>
> Consider a Join Accumulator, It will merge two records, completing the
> not-null fields.
> It is very useful for wide tables, where two source tables join together to
> form a wide table.
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