fallintoplace opened a new pull request, #2482:
URL: https://github.com/apache/iceberg-go/pull/2482

   ## What
   - Project equality-delete fields missing from older data files.
   
   ## Why
   - Iceberg reads later-added delete fields using their initial default or 
null value.
   
   ## Implementation
   - Add missing equality keys to the data scan projection.
   - Preserve nested parent nulls and cover changelog reads.
   
   ## References
   - [Iceberg spec: Equality Delete 
Files](https://iceberg.apache.org/spec/#equality-delete-files)
   - [Java 
DeleteFilter](https://github.com/apache/iceberg/blob/main/data/src/main/java/org/apache/iceberg/data/DeleteFilter.java#L1197-L1206)
   - [Java 
fileProjection](https://github.com/apache/iceberg/blob/main/data/src/main/java/org/apache/iceberg/data/DeleteFilter.java#L1299-L1360)
   


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