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https://issues.apache.org/jira/browse/CALCITE-320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17472264#comment-17472264
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Yifei Yang commented on CALCITE-320:
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Has this issue been fixed already? I'm still getting 6 cartesian joins on tpch 
q21 after decorrelation. I'm using 1.27.0. 

> When decorrelating TPCH21, Optiq fails to push where clauses into copied join 
> subtrees
> --------------------------------------------------------------------------------------
>
>                 Key: CALCITE-320
>                 URL: https://issues.apache.org/jira/browse/CALCITE-320
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: Jacques Nadeau
>            Priority: Major
>
> This failure causes excessive numbers of cartesian joins to be generated.



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