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

49 lines
1.4 KiB
C++
Raw Normal View History

2011-08-09 19:19:00 +00:00
#pragma once
2010-03-04 19:20:28 +00:00
2011-11-06 05:01:42 +00:00
#include <DB/Core/Block.h>
2010-06-04 18:25:25 +00:00
#include <DB/IO/WriteBuffer.h>
2010-03-04 19:20:28 +00:00
#include <DB/DataStreams/IRowOutputStream.h>
namespace DB
{
2012-11-10 04:43:04 +00:00
/** Поток для вывода данных в формате tsv.
2010-03-04 19:20:28 +00:00
*/
class TabSeparatedRowOutputStream : public IRowOutputStream
{
public:
2011-11-06 06:22:52 +00:00
/** 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);
2010-03-04 19:20:28 +00:00
void writeField(const IColumn & column, const IDataType & type, size_t row_num) override;
void writeFieldDelimiter() override;
void writeRowEndDelimiter() override;
void writePrefix() override;
void writeSuffix() override;
void flush() override { ostr.next(); }
void setTotals(const Block & totals_) override { totals = totals_; }
void setExtremes(const Block & extremes_) override { extremes = extremes_; }
2010-03-04 19:20:28 +00:00
/// https://www.iana.org/assignments/media-types/text/tab-separated-values
String getContentType() const override { return "text/tab-separated-values; charset=UTF-8"; }
2012-08-17 19:53:11 +00:00
protected:
void writeTotals();
void writeExtremes();
2010-06-04 18:25:25 +00:00
WriteBuffer & ostr;
2012-10-10 18:32:45 +00:00
const Block sample;
2011-11-06 06:22:52 +00:00
bool with_names;
bool with_types;
Block totals;
Block extremes;
2010-03-04 19:20:28 +00:00
};
}