wesm commented on pull request #7341:
URL: https://github.com/apache/arrow/pull/7341#issuecomment-638284817


   Per the mailing list discussion, I think we should apply the strategies used 
by open source analytic DBMS that we have access to and not think too hard 
about it:
   
   * Do signed arithmetic as unsigned to prevent UB
   * Do not promote small integers
   * Do not check for overflows


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