/usr/local/lib64/python3.6/site-packages/pyarrow/include/arrow/dataset
Edit: /usr/local/lib64/python3.6/site-packages/pyarrow/include/arrow/dataset/file_csv.h (4098B)
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
#pragma once
#include
#include
#include "arrow/csv/options.h"
#include "arrow/dataset/dataset.h"
#include "arrow/dataset/file_base.h"
#include "arrow/dataset/type_fwd.h"
#include "arrow/dataset/visibility.h"
#include "arrow/ipc/type_fwd.h"
#include "arrow/status.h"
#include "arrow/util/compression.h"
namespace arrow {
namespace dataset {
constexpr char kCsvTypeName[] = "csv";
/// \addtogroup dataset-file-formats
///
/// @{
/// \brief A FileFormat implementation that reads from and writes to Csv files
class ARROW_DS_EXPORT CsvFileFormat : public FileFormat {
public:
/// Options affecting the parsing of CSV files
csv::ParseOptions parse_options = csv::ParseOptions::Defaults();
std::string type_name() const override { return kCsvTypeName; }
bool Equals(const FileFormat& other) const override;
Result IsSupported(const FileSource& source) const override;
/// \brief Return the schema of the file if possible.
Result> Inspect(const FileSource& source) const override;
/// \brief Open a file for scanning
Result ScanFile(
const std::shared_ptr& options,
const std::shared_ptr& fragment) const override;
Result ScanBatchesAsync(
const std::shared_ptr& scan_options,
const std::shared_ptr& file) const override;
Future> CountRows(
const std::shared_ptr& file, compute::Expression predicate,
const std::shared_ptr& options) override;
Result> MakeWriter(
std::shared_ptr destination, std::shared_ptr schema,
std::shared_ptr options,
fs::FileLocator destination_locator) const override;
std::shared_ptr DefaultWriteOptions() override;
};
/// \brief Per-scan options for CSV fragments
struct ARROW_DS_EXPORT CsvFragmentScanOptions : public FragmentScanOptions {
std::string type_name() const override { return kCsvTypeName; }
/// CSV conversion options
csv::ConvertOptions convert_options = csv::ConvertOptions::Defaults();
/// CSV reading options
///
/// Note that use_threads is always ignored.
csv::ReadOptions read_options = csv::ReadOptions::Defaults();
};
class ARROW_DS_EXPORT CsvFileWriteOptions : public FileWriteOptions {
public:
/// Options passed to csv::MakeCSVWriter.
std::shared_ptr write_options;
protected:
using FileWriteOptions::FileWriteOptions;
friend class CsvFileFormat;
};
class ARROW_DS_EXPORT CsvFileWriter : public FileWriter {
public:
Status Write(const std::shared_ptr& batch) override;
private:
CsvFileWriter(std::shared_ptr destination,
std::shared_ptr writer,
std::shared_ptr schema,
std::shared_ptr options,
fs::FileLocator destination_locator);
Status FinishInternal() override;
std::shared_ptr destination_;
std::shared_ptr batch_writer_;
friend class CsvFileFormat;
};
/// @}
} // namespace dataset
} // namespace arrow