alamb commented on PR #11165:
URL: https://github.com/apache/arrow-rs/pull/11165#issuecomment-5837201764

   > The annotations must give information that the order cannot give. Here is 
the use case for each one:
   > 
   > *
   
   In my mind, one key usecase for this API is so that a caller could figure 
out what pages will be needed for each batch and can schedule/prefetch them, to 
support incremental decode
   - https://github.com/apache/arrow-rs/issues/6946
   


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