[GitHub] [arrow-datafusion] Dandandan opened a new issue, #3945: Implement right semi join and support it in HashBuildProbeOrder

[GitBox <gi...@apache.org>]

Dandandan opened a new issue, #3945:
URL: https://github.com/apache/arrow-datafusion/issues/3945

   **Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
   Currently, we have a `SemiJoin` option, this is basically a left semi join.
   This works nicely, but because we don't have a `RightSemiJoin` we can't change the build/probe order.
   
   If we have a `RightSemiJoin` we could support this - changing to use a right semi join whenever the build side is larger than the probe side.
   
   A right semi join returns the right row (at most once) for every match on the left side.
   
   **Describe the solution you'd like**
   Implement `RightSemiJoin` and swap join order if the build side is bigger.
   
   **Describe alternatives you've considered**
   
   **Additional context**
   


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[GitHub] [arrow-datafusion] Dandandan closed issue #3945: Implement right semi join and support it in HashBuildProbeOrder

[GitBox <gi...@apache.org>]

Dandandan closed issue #3945: Implement right semi join and support it in HashBuildProbeOrder
URL: https://github.com/apache/arrow-datafusion/issues/3945


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