ClickHouse/dbms/include/DB/DataStreams/VerticalRowOutputStream.h
2016-08-13 04:57:35 +03:00

55 lines
1.3 KiB
C++
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

#pragma once
#include <DB/Core/Block.h>
#include <DB/Core/Names.h>
#include <DB/DataStreams/IRowOutputStream.h>
namespace DB
{
class WriteBuffer;
/** 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 IColumn & column, const IDataType & type, size_t row_num) override;
void writeRowStartDelimiter() override;
void writeRowBetweenDelimiter() override;
void flush() override;
protected:
virtual void writeValue(const IColumn & column, const IDataType & type, size_t row_num) const;
WriteBuffer & ostr;
const Block sample;
Names names;
size_t field_number;
size_t row_number;
using Pads_t = std::vector<String>;
Pads_t pads;
};
/** То же самое, но строки выводятся без экранирования.
*/
class VerticalRawRowOutputStream : public VerticalRowOutputStream
{
public:
VerticalRawRowOutputStream(WriteBuffer & ostr_, const Block & sample_)
: VerticalRowOutputStream(ostr_, sample_) {}
protected:
void writeValue(const IColumn & column, const IDataType & type, size_t row_num) const override;
};
}