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  1. Apache Arrow
  2. ARROW-13849

[C++] Add min and max aggregation functions

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      We have min_max but that returns a struct array. At some point we will want compute kernels that we can call in a ProjectNode that will allow us to get at struct array elements, but for now it would be nice to have (hash_)min and max that just give the scalar we want.

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              lidavidm David Li
              npr Neal Richardson
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