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  1. Apache Arrow
  2. ARROW-15441

[C++][Compute] hash_count aggregation of a null type column is incorrect

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Details

    • Bug
    • Status: Resolved
    • Minor
    • Resolution: Fixed
    • None
    • 7.0.0
    • C++

    Description

      The result of hash_count such array is incorrect.

      argument key
      NULL 1
      NULL 1

       

      CountOptions Expected Actual
      ALL 2 2
      ONLY_VALID 0 2
      ONLY_NULL 2 0

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              crystrix Chenxi Li
              crystrix Chenxi Li
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