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

44 lines
849 B
C++

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