mapleFU commented on code in PR #43661:
URL: https://github.com/apache/arrow/pull/43661#discussion_r1715623370


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cpp/src/arrow/dataset/file_parquet.cc:
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@@ -555,6 +562,57 @@ Future<std::shared_ptr<parquet::arrow::FileReader>> 
ParquetFileFormat::GetReader
       });
 }
 
+struct CastingGenerator {

Review Comment:
   Provide hint would looks like: https://github.com/apache/arrow-rs/pull/5939
   
   Maybe I can add separate issue for that



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