ad1happy2go commented on PR #19005:
URL: https://github.com/apache/hudi/pull/19005#issuecomment-4893049838

   @danny0405 @yihua — does the explanation above make sense? To recap the core 
argument: the table type (COW vs MOR) is a storage detail and shouldn't change 
the result of an incremental query, and the merge here isn't unbounded — it's 
scoped to the incremental window's commit-time range via `InstantRange`, 
exactly the window COW already uses. So MOR ends up returning the same 
fully-materialized rows COW does for that window.
   
   If that reasoning holds, could you help review this PR? Happy to walk 
through any specific scenario where the expected output still seems ambiguous.


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