bkietz commented on a change in pull request #9725:
URL: https://github.com/apache/arrow/pull/9725#discussion_r597084271
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File path: cpp/src/arrow/dataset/file_csv.h
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@@ -38,6 +38,13 @@ class ARROW_DS_EXPORT CsvFileFormat : public FileFormat {
public:
/// Options affecting the parsing of CSV files
csv::ParseOptions parse_options = csv::ParseOptions::Defaults();
+ /// Number of header rows to skip (see arrow::csv::ReadOptions::skip_rows)
+ int32_t skip_rows = 0;
+ /// Column names for the target table (see
arrow::csv::ReadOptions::column_names)
+ std::vector<std::string> column_names;
Review comment:
I'm still -0 on including this option. It makes sense for a single file
reader but I don't think datasets needs to provide two approaches for renaming
columns.
By contrast, skip_rows and autogenerate are necessary here to accommodate
the cases where files
- have non-csv front matter like a license comment which we shouldn't
attempt to parse
- have data in their first row which we shouldn't interpret as column names
respectively.
@jorisvandenbossche @nealrichardson what do you think?
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