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

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2011-11-28 04:05:53 +00:00
#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;
/** Интерфейс потока 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);
void writeRowStartDelimiter();
void writeRowBetweenDelimiter();
RowOutputStreamPtr clone() { return new VerticalRowOutputStream(ostr, sample); }
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;
};
}