alamb commented on issue #7715:
URL: https://github.com/apache/arrow-rs/issues/7715#issuecomment-3058459768

   Here is some code archeology in the iceberg crate:
   
   https://github.com/search?q=repo%3Aapache%2Ficeberg%20shred&type=code
   
   Here is the representation of the Shredded Variant:
   
https://github.com/apache/iceberg/blob/09140e52836048b112c42c9cfe721295bd57048b/core/src/main/java/org/apache/iceberg/variants/ShreddedObject.java#L41
   
   I can't quite figure out how it works, but it looks like you provide a 
variant shredding function to the writer;
   
https://github.com/apache/iceberg/blob/09140e52836048b112c42c9cfe721295bd57048b/parquet/src/test/java/org/apache/iceberg/parquet/TestVariantMetrics.java#L460


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