[GitHub] [arrow-rs] houqp commented on pull request #702: Support binary data type in `build_struct_array`.

[GitBox <gi...@apache.org>]

houqp commented on pull request #702:
URL: https://github.com/apache/arrow-rs/pull/702#issuecomment-903346386


   > Yeah, I've only ever base64 encoded to a string, so I wonder if there'd be some data loss if we don't do some conversion to a string representation
   
   I think writer needs to take care of the encoding and the reader needs to decode accordingly. For example encoding arbitrary binary into base64 is one way to do this. Another way is to encode binary as 2 bytes unicode code point. Whatever the encoding/decoding strategy gets picked, the writer is responsible to encode the binary into valid utf8 string. So it's really just a convention that the writer and reader needs to follow.


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