scovich commented on PR #4967:
URL: https://github.com/apache/arrow-rs/pull/4967#issuecomment-2657453316

   IMO that older PR does _NOT_ solve the problem mentioned here. That PR gives 
a way to cast from binary to string (that happens to contain base64-encded 
binary data). But arrow JSON still doesn't have any actual support for encoding 
and decoding the arrow binary type. 
   
   That said, there's definitely an argument to be made that round trip 
encoding needs domain knowledge (ie does the sender and/or receiver expect hex? 
base64? ascii85? which variant? etc. So maybe manual casts are the best arrow 
itself can expose, to avoid getting sucked into that rabbit hole?


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