nealrichardson commented on a change in pull request #7896:
URL: https://github.com/apache/arrow/pull/7896#discussion_r464676677
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File path: cpp/src/arrow/dataset/file_csv.cc
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@@ -39,49 +41,92 @@ namespace dataset {
using internal::checked_cast;
using internal::checked_pointer_cast;
+Result<std::unordered_set<std::string>> GetColumnNames(
Review comment:
Would it make sense/be possible to move this somewhere more generally
available for CSV reading? @romainfrancois encountered a similar need in
https://github.com/apache/arrow/pull/7807#issuecomment-662045381
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