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[C++][Acero] hash_one not implemented for dictionary and other types #44661

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nealrichardson opened this issue Nov 6, 2024 · 0 comments
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@nealrichardson
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Describe the enhancement requested

Observed while adding R support in #44652. If you call this function on a Table/Dataset that has dictionary type columns (factor in R), you get

NotImplemented: Function 'hash_one' has no kernel matching input types
    (dictionary<values=string, indices=int8, ordered=0>, uint8)

It appears to have been left off in #12368 and no followup issue was made. I don't see any technical reason for not doing it, but I'm not familiar enough with the C++ compute code to see how to add it.

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C++

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