lidavidm commented on a change in pull request #10270:
URL: https://github.com/apache/arrow/pull/10270#discussion_r643169048
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File path: cpp/src/arrow/dataset/file_csv.h
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@@ -61,6 +61,10 @@ class ARROW_DS_EXPORT CsvFileFormat : public FileFormat {
const std::shared_ptr<ScanOptions>& scan_options,
const std::shared_ptr<FileFragment>& file) const override;
+ Future<util::optional<int64_t>> CountRows(
+ const std::shared_ptr<FileFragment>& file, compute::Expression predicate,
+ std::shared_ptr<ScanOptions> options) override;
Review comment:
I think I had patterned everything on Fragment::Scan (which takes it by
value) but all the new methods take it by const reference so I'll adjust that.
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File path: cpp/src/arrow/dataset/file_csv_test.cc
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@@ -50,7 +50,10 @@ class CsvFormatHelper {
}
static std::shared_ptr<CsvFileFormat> MakeFormat() {
- return std::make_shared<CsvFileFormat>();
+ auto format = std::make_shared<CsvFileFormat>();
+ // Required for CountRows
+ format->parse_options.ignore_empty_lines = false;
Review comment:
It is logical rows of data; I'll clarify this.
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