alamb commented on pull request #984:
URL: https://github.com/apache/arrow-rs/pull/984#issuecomment-995847925


   > It's been a while, but if I recall correctly, the idea was for compute 
kernels in arrow to follow a similar approach to C++ where we have a Datum (or 
whatever we call it), which could likely be an enum of the same datatype. 
Within that Datum, we'd have Scalar, Array, ...
   
   That is a great idea @nevi-me  -- I couldn't find an existing ticket so I 
wrote a new one here: https://github.com/apache/arrow-rs/issues/1047
   
   Maybe we can work towards that vision, starting with the equality kernels 
(we'll need all the pieces and tests, even when we have a fully dynamic 
dispatch, I suspect)


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