ilya-biryukov opened a new issue #708:
URL: https://github.com/apache/arrow-rs/issues/708


   **Describe the bug**
   Reading parquet files with byte arrays encoded using `DELTA_BYTE_ARRAY` 
causes the error mentioned from the title.
   Corresponding fields must be of `UTF8` converted type.
   
   **To Reproduce**
   Steps to reproduce the behavior:
   1. read parquet file with strings encoded as `DELTA_BYTE_ARRAY` with 
parquet's arrow readers.
   
   **Expected behavior**
   1. file reads with no error
   
   Actual: the aforementioned error is produced.
   
   **Additional context**
   We fixed this in our fork, I'll send a PR for review and further discussion 
soon.
   


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