ClickHouse/dbms/include/DB/DataStreams/ValuesRowOutputStream.h
2012-10-10 18:32:45 +00:00

40 lines
805 B
C++

#pragma once
#include <Poco/SharedPtr.h>
#include <DB/Core/Block.h>
#include <DB/IO/WriteBuffer.h>
#include <DB/DataStreams/IRowOutputStream.h>
namespace DB
{
using Poco::SharedPtr;
/** Интерфейс потока для вывода данных в формате VALUES (как в INSERT запросе).
*/
class ValuesRowOutputStream : public IRowOutputStream
{
public:
ValuesRowOutputStream(WriteBuffer & ostr_, const Block & sample_);
void writeField(const Field & field);
void writeFieldDelimiter();
void writeRowStartDelimiter();
void writeRowEndDelimiter();
void writeRowBetweenDelimiter();
RowOutputStreamPtr clone() { return new ValuesRowOutputStream(ostr, sample); }
private:
WriteBuffer & ostr;
const Block sample;
DataTypes data_types;
size_t field_number;
};
}