[jira] [Created] (ARROW-10582) [Rust] [DataFusion] Implement "repartition" operator

["Andy Grove (Jira)" <ji...@apache.org>]

Andy Grove created ARROW-10582:
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             Summary: [Rust] [DataFusion] Implement "repartition" operator
                 Key: ARROW-10582
                 URL: https://issues.apache.org/jira/browse/ARROW-10582
             Project: Apache Arrow
          Issue Type: New Feature
          Components: Rust, Rust - DataFusion
            Reporter: Andy Grove


The repartition operator should read batches from its input partitions and then map that data to its output partitions using a specific partitioning scheme.

The simplest and most efficient partition schema would be a "round robin batch partitioner". For each input batch, it would pick the next output partition to write to. This is a convenient way to change the number of partitions up or down with minimal overhead.

Another example of a partitioning scheme would be a hash partitioner, which computes the hash of the partition keys on each incoming row and then applies a modulus to determine which output partition to write to.

 

 

 



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