ClickHouse/dbms/include/DB/DataStreams/TabSeparatedRowOutputStream.h
2011-11-06 06:22:52 +00:00

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#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 tsv.
*/
class TabSeparatedRowOutputStream : public IRowOutputStream
{
public:
/** with_names - выводить в первой строке заголовок с именами столбцов
* with_types - выводить на следующей строке заголовок с именами типов
*/
TabSeparatedRowOutputStream(WriteBuffer & ostr_, const Block & sample_, bool with_names_ = false, bool with_types_ = false);
void writeField(const Field & field);
void writeFieldDelimiter();
void writeRowEndDelimiter();
void writePrefix();
RowOutputStreamPtr clone() { return new TabSeparatedRowOutputStream(ostr, sample); }
private:
WriteBuffer & ostr;
const Block & sample;
bool with_names;
bool with_types;
DataTypes data_types;
size_t field_number;
};
}