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https://issues.apache.org/jira/browse/FLINK-6089?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15938763#comment-15938763
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ASF GitHub Bot commented on FLINK-6089:
---------------------------------------

Github user hequn8128 commented on the issue:

    https://github.com/apache/flink/pull/3564
  
    hi @fhueske , thanks for the review. I was expecting some other batch 
use-cases where we may need to rewrite the logical plan after volcano. But you 
are right, we do not need to add it into BatchTableEnvironment for now. I have 
updated PR to remove it from BatchTableEnvironment. Please take a look.


> Implement decoration phase for rewriting predicated logical plan after 
> volcano optimization phase
> -------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-6089
>                 URL: https://issues.apache.org/jira/browse/FLINK-6089
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Table API & SQL
>            Reporter: Shaoxuan Wang
>            Assignee: Hequn Cheng
>
> At present, there is no chance to modify the DataStreamRel tree after the 
> volcano optimization. We consider to add a decoration phase after volcano 
> optimization phase. Decoration phase is dedicated for rewriting predicated 
> logical plan and is independent of cost module. After decoration phase is 
> added, we get the chance to apply retraction rules at this phase.



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