felipecrv commented on PR #36740:
URL: https://github.com/apache/arrow/pull/36740#issuecomment-1642195098

   > Personally I think `has_validity_buffer` would better changed to 
`has_null`, the name would be better here.
   
   The general theme for the `has_validity_buffer` across the kernel and 
utilities is about presence of the buffer that will be written to. We can 
actually avoid computing the null count if we are OK with sometimes producing 
`11111...` bitmaps which might be an efficiency gain in the future.


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