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

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#pragma once
#include <DB/DataStreams/IBlockOutputStream.h>
namespace DB
{
/** Пишет данные в tab-separated файл, но по столбцам, блоками.
* Блоки разделены двойным переводом строки.
* На каждой строке блока - данные одного столбца.
*/
class TabSeparatedBlockOutputStream : public IBlockOutputStream
{
public:
TabSeparatedBlockOutputStream(WriteBuffer & ostr_) : ostr(ostr_) {}
void write(const Block & block) override;
void flush() override { ostr.next(); }
private:
WriteBuffer & ostr;
};
}