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https://issues.apache.org/jira/browse/CALCITE-3910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17082011#comment-17082011
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Chunwei Lei commented on CALCITE-3910:
--------------------------------------

[~zabetak] , no, I am not working on this.

> Enhance ProjectJoinTransposeRule to support SemiJoin and AntiJoin
> -----------------------------------------------------------------
>
>                 Key: CALCITE-3910
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3910
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 1.22.0
>            Reporter: Chunwei Lei
>            Priority: Major
>
> Currently, ProjectJoinTransposeRule does not support push project pass 
> SemiJoin and AntiJoin.
> {code:java}
> public void onMatch(RelOptRuleCall call) {
>   Project origProj = call.rel(0);
>   final Join join = call.rel(1);
>   if (!join.getJoinType().projectsRight()) {
>     return; // TODO: support SemiJoin / AntiJoin
>   }
>   ...
>   ...
> }{code}
>  



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