nealrichardson commented on PR #15180:
URL: https://github.com/apache/arrow/pull/15180#issuecomment-1414393130

   It would be good to run the macrobenchmarks on this. I would expect some 
speedup, mainly in the python queries (assuming we have any that would trigger 
this) since much of this is already handled in the R code, because we should be 
avoiding some big casts. Perhaps more importantly though, I ran into some 
issues with decimal types in #14553 and had to [exclude decimals from the type 
conversion](https://github.com/apache/arrow/pull/14553/files#diff-63c0f9982496837d6863f0aeaa0b2dff573175f2219ab0dcacd45da3c076c516R178-R188).
 I noticed this because a TPC-H query errored as a result of trying to keep 
operations on decimals.


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