edubraqd commented on PR #24916:
URL: https://github.com/apache/datafusion/pull/24916#issuecomment-5533168607

   Thanks for the review, both points addressed in the follow-up commit:
   
   - The fallback is now limited to `Duration` and `Interval` ORDER BY types 
(plus those nested in `Dictionary` / `RunEndEncoded`), which compare the same 
way in the RANGE peer check as in the sort. `Struct` and `Map` keep being 
rejected at planning time; `window.slt` now has a `Map` case with distinct 
values and the `Struct` cases as planning errors.
   - The explanation lives in one place, on the new `supports_free_range_frame` 
helper next to the fallback. The error in `extract_window_frame_target_type` no 
longer claims to be offset-specific: it now reads `RANGE window frames are not 
supported for ORDER BY type ...`.
   


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