jbewing opened a new pull request, #13636:
URL: https://github.com/apache/iceberg/pull/13636

   ### What
   
   This PR updates all writes from Spark 3.5 to set the `sort_order_id` of data 
files when applicable per the [Iceberg Table 
Spec](https://iceberg.apache.org/spec/#partition-evolution:~:text=A%20data%20or%20delete%20file%20is%20associated%20with%20a%20sort%20order%20by%20the%20sort%20order%27s%20id%20within%20a%20manifest).
 I've opened this PR to:
   1. Gauge interest in this and validate my approach
   2. If the approach is good, port these changes to Spark 4.0 and 3.4 in a 
follow up PR
   3. As a follow up to those PRs, implement the ability to then report this 
ordering information when applicable to Spark to better inform the query 
planner of potential optimizations. This is rather useful when used in 
conjunction with SPJ and I have this running on an Iceberg fork with success
   
   ### Testing
   I've added tests for newer added utility functions and updated existing 
tests that write data files and compact data files in a sorted manner to verify 
that we're setting the `sort_order_id` entry in the manifests to the correct 
value.
   
   Issue: https://github.com/apache/iceberg/issues/13634


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