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