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https://issues.apache.org/jira/browse/CALCITE-3910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17082012#comment-17082012
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Liya Fan commented on CALCITE-3910:
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[~Chunwei Lei] Thanks for opening this issue. It looks interesting. May I try
to provide a patch to it?
> 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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