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  1. Apache Arrow
  2. ARROW-13574

[C++] Add 'count all' option to count (hash) aggregate kernel

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      The current "count" hash aggregate kernel counts either all non-null or all null values, but doesn't count all values regardless of nullity (i.e. SQL "count(*)" or Pandas size()).

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              lidavidm David Li
              lidavidm David Li
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