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Posted to jira@arrow.apache.org by "Daniël Heres (Jira)" <ji...@apache.org> on 2020/12/19 12:02:00 UTC

[jira] [Created] (ARROW-10971) [Rust][DataFusion] Left Join implementation is wrong for multiple batches on right side

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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