Jefffrey opened a new issue, #5074:
URL: https://github.com/apache/arrow-rs/issues/5074

   **Is your feature request related to a problem or challenge? Please describe 
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   See 
https://github.com/apache/arrow-rs/blob/7ba36b012322e08b06184c806f8ba339181cebc1/parquet/src/file/metadata.rs#L888-L889
   
   From parquet thrift:
   
   
https://github.com/apache/parquet-format/blob/46cc3a0647d301bb9579ca8dd2cc356caf2a72d2/src/main/thrift/parquet.thrift#L982-L988
   
   ```
     /**
      * Stores whether both min_values and max_values are ordered and if so, in
      * which direction. This allows readers to perform binary searches in both
      * lists. Readers cannot assume that max_values[i] <= min_values[i+1], even
      * if the lists are ordered.
      */
     4: required BoundaryOrder boundary_order
   ```
   
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   Some additional reading/discussion;
   
   https://github.com/apache/parquet-format/blob/master/PageIndex.md
   
   https://github.com/apache/arrow-rs/pull/5003#discussion_r1389675899
   
   - Need to ensure for special types like Float16 where sort order differs 
from its physical type representation that this is accounted for & tested
   


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