unikdahal commented on PR #5320:
URL: 
https://github.com/apache/datafusion-comet/pull/5320#issuecomment-5272815945

   CI failures traced to two issues: 
   
   1. outputPartitioning could force partition planning before the COW 
dynamic-file-filter subquery resolved ( will be fixing it). 
   
   2.  Nested-struct schema evolution hits a positional (not field-id) cast in 
iceberg-rust's RecordBatchTransformer, which can misalign/crash on evolved COW 
tables. The fix exists upstream as apache/iceberg-rust#2647 but isn't merged 
yet.
   
   This PR depends on  apache/iceberg-rust#2647 merging. Hence changing the PR 
status as draft for now


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