westonpace commented on a change in pull request #10636:
URL: https://github.com/apache/arrow/pull/10636#discussion_r670781453
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File path: cpp/src/arrow/dataset/file_parquet.cc
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@@ -877,22 +878,26 @@ Result<std::shared_ptr<DatasetFactory>>
ParquetDatasetFactory::Make(
// Insert the path, or increase the count of row groups. It will be
assumed that the
// RowGroup of a file are ordered exactly as in the metadata file.
- auto row_groups = &path_to_row_group_ids.insert({std::move(path),
{}}).first->second;
- row_groups->emplace_back(i);
+ auto inserted_index =
+ paths_to_index.insert({std::move(path),
paths_with_row_group_ids.size()});
Review comment:
Thanks. I've applied this suggestion (didn't realize it was a
suggestion when I saw it in zulip so I did it manually).
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