steveloughran commented on PR #15384:
URL: https://github.com/apache/iceberg/pull/15384#issuecomment-4480897193

   thanks.
   in #16133 I've had it working with a different impl of this pr (something 
copilot did for me, separate from my main work). moving to yours is hitting 
some problems with spark parsing the normalised path coming down from iceberg, 
e.g
   
   good
   ```
   variant_get(nested, '$.varcategory', 'int')";
   ```
   bad
   ```
   variant_get(nested, ''[$'.'varcategory'], 'int')";
   ```
   Switch UnboundExtract.path to the raw rather than normalized path and things 
are happy, but that makes the code brittle to all the things normalisation is 
meant to stop.
   
   
   


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