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  1. Apache Arrow
  2. ARROW-12301

[C++][Compute] Use generic hash-aggregate for DictionaryArrays

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Details

    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • C++
    • None

    Description

      When calculating unique for chunked DictionaryArrays we currently run through all chunks and unify their dictionaries and then collect chunk indices. We could avoid the dictionary unification by using a generic hash.

      See discussion here and here

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          is a child of

          New Feature - A new feature of the product, which has yet to be developed. ARROW-12633 [C++] Query engine umbrella issue

          • Major - Major loss of function.
          • Open

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              Unassigned Unassigned
              rokm Rok Mihevc
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              Dates

                Created:
                Updated: