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#pragma once
#include <Core/Block.h>
#include <Processors/Formats/IRowOutputFormat.h>
#include <Formats/FormatSettings.h>
namespace DB
{
class WriteBuffer;
/** The stream for outputting data in csv format.
* Does not conform with https://tools.ietf.org/html/rfc4180 because it uses LF, not CR LF.
*/
class CSVRowOutputFormat final : public IRowOutputFormat
{
public:
/** with_names - output in the first line a header with column names
* with_types - output in the next line header with the names of the types
*/
CSVRowOutputFormat(WriteBuffer & out_, const Block & header_, bool with_names_, bool with_types, const FormatSettings & format_settings_);
String getName() const override { return "CSVRowOutputFormat"; }
/// https://www.iana.org/assignments/media-types/text/csv
String getContentType() const override
{
return String("text/csv; charset=UTF-8; header=") + (with_names ? "present" : "absent");
}
private:
void writeField(const IColumn & column, const ISerialization & serialization, size_t row_num) override;
void writeFieldDelimiter() override;
void writeRowEndDelimiter() override;
bool supportTotals() const override { return true; }
bool supportExtremes() const override { return true; }
void writeBeforeTotals() override;
void writeBeforeExtremes() override;
void writePrefix() override;
void writeLine(const std::vector<String> & values);
bool with_names;
bool with_types;
const FormatSettings format_settings;
DataTypes data_types;
};
}
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