Daniël Heres created ARROW-10971:
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Summary: [Rust][DataFusion] Left Join implementation is wrong for
multiple batches on right side
Key: ARROW-10971
URL: https://issues.apache.org/jira/browse/ARROW-10971
Project: Apache Arrow
Issue Type: Bug
Reporter: Daniël Heres
Currently the left join generates a null for every row that is not present in
the right batch.
However, this is wrong, as there should be no math in _all_ of the right
batches.
The current implementation generates extra (left, none) tuples for every batch
where the left side is not present.
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