ClickHouse/dbms/include/DB/DataStreams/VerticalRowOutputStream.h

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#pragma once
#include <Poco/SharedPtr.h>
#include <DB/Core/Block.h>
#include <DB/Core/Names.h>
#include <DB/IO/WriteBuffer.h>
#include <DB/DataStreams/IRowOutputStream.h>
namespace DB
{
using Poco::SharedPtr;
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/** Поток для вывода данных в формате "каждое значение на своей строке".
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*/
class VerticalRowOutputStream : public IRowOutputStream
{
public:
VerticalRowOutputStream(WriteBuffer & ostr_, const Block & sample_);
void writeField(const Field & field) override;
void writeRowStartDelimiter() override;
void writeRowBetweenDelimiter() override;
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void flush() override { ostr.next(); }
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private:
WriteBuffer & ostr;
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const Block sample;
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DataTypes data_types;
Names names;
size_t field_number;
size_t row_number;
typedef std::vector<String> Pads_t;
Pads_t pads;
};
}