lidavidm commented on a change in pull request #9725:
URL: https://github.com/apache/arrow/pull/9725#discussion_r596911713



##########
File path: cpp/src/arrow/dataset/scanner.h
##########
@@ -240,6 +240,9 @@ class ARROW_DS_EXPORT ScannerBuilder {
   /// \brief Set the pool from which materialized and scanned arrays will be 
allocated.
   Status Pool(MemoryPool* pool);
 
+  /// \brief Set fragment-specific scan options.
+  Status FragmentScanOptions(std::shared_ptr<FragmentScanOptions> 
fragment_scan_options);

Review comment:
       Yeah, I think the slight niggle I have there is that there wouldn't be a 
corresponding 'Flight(File)Format'. Maybe 'PerScanOptions'? But it's not a big 
deal and FormatScanOptions is OK with me too.




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