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https://issues.apache.org/jira/browse/FLINK-31296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17695491#comment-17695491
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Aitozi commented on FLINK-31296:
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But this will affect the join key pair in the Join operator which may affect 
the state compatibility, I'm not sure how to handle this implicit breaking

> Add JoinConditionEqualityTransferRule to stream optimizer
> ---------------------------------------------------------
>
>                 Key: FLINK-31296
>                 URL: https://issues.apache.org/jira/browse/FLINK-31296
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table SQL / Planner
>            Reporter: Aitozi
>            Priority: Major
>
> I find that {{JoinConditionEqualityTransferRule}} is a common rule for batch 
> and stream mode. So it should be added to the stream optimizer which will 
> bring performance improvement in some case.
> Maybe, other rules also need to be reviewed whether can be aligned in batch 
> and stream case.  



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