cloud-fan commented on PR #58409:
URL: https://github.com/apache/spark/pull/58409#issuecomment-5543529404

   Thanks for the detailed trace. Your reading is correct: the warning path 
only tolerates data/partition overlap, while duplicates within `dataSchema` are 
rejected before reader construction. I don't see a supported path where 
`dataSchema.fieldIndex` must distinguish duplicate occurrences, so my earlier 
finding was incorrect. The streaming late-failure case is separate from this PR.
   


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