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

#pragma once

#include <DB/DataStreams/IBlockOutputStream.h>
#include <DB/DataStreams/IRowOutputStream.h>


namespace DB
{

/** Преобразует поток для записи данных по строкам в поток для записи данных по блокам.
  * Наример, для записи текстового дампа.
  */
class BlockOutputStreamFromRowOutputStream : public IBlockOutputStream
{
public:
	BlockOutputStreamFromRowOutputStream(RowOutputStreamPtr row_output_);
	void write(const Block & block) override;
	void writePrefix() override { row_output->writePrefix(); }
	void writeSuffix() override { row_output->writeSuffix(); }

	void flush() override { row_output->flush(); }

	void setRowsBeforeLimit(size_t rows_before_limit) override;
	void setTotals(const Block & totals) override;
	void setExtremes(const Block & extremes) override;
	void onProgress(const Progress & progress) override;

	String getContentType() const override { return row_output->getContentType(); }

private:
	RowOutputStreamPtr row_output;
	bool first_row;
};

}