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https://issues.apache.org/jira/browse/FLINK-37897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17959826#comment-17959826
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CaoZhen commented on FLINK-37897:
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Hi, [~xuyangzhong] ,is this issue in progress? If not, I would like to try it.

> Support converting a regular join to a delta join for the simplest pattern in 
> planner
> -------------------------------------------------------------------------------------
>
>                 Key: FLINK-37897
>                 URL: https://issues.apache.org/jira/browse/FLINK-37897
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table SQL / Planner
>            Reporter: Xuyang Zhong
>            Priority: Major
>
> Support the simplest pattern: 
>  * inner join
>  * only contains source, calc, join, sink, exchange
>  * no calc between source and join
>  * append-only source



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