mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-17 21:24:28 +00:00
56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
#pragma once
|
|
|
|
#include <DB/Core/Block.h>
|
|
#include <DB/Core/Names.h>
|
|
#include <DB/DataStreams/IRowOutputStream.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
class WriteBuffer;
|
|
class Context;
|
|
|
|
|
|
/** Stream to output data in format "each value in separate row".
|
|
* Usable to show few rows with many columns.
|
|
*/
|
|
class VerticalRowOutputStream : public IRowOutputStream
|
|
{
|
|
public:
|
|
VerticalRowOutputStream(WriteBuffer & ostr_, const Block & sample_, const Context & context);
|
|
|
|
void writeField(const IColumn & column, const IDataType & type, size_t row_num) override;
|
|
void writeRowStartDelimiter() override;
|
|
void writeRowBetweenDelimiter() override;
|
|
|
|
void flush() override;
|
|
|
|
protected:
|
|
virtual void writeValue(const IColumn & column, const IDataType & type, size_t row_num) const;
|
|
|
|
WriteBuffer & ostr;
|
|
const Block sample;
|
|
size_t field_number = 0;
|
|
size_t row_number = 0;
|
|
|
|
using NamesAndPaddings = std::vector<String>;
|
|
NamesAndPaddings names_and_paddings;
|
|
};
|
|
|
|
|
|
/** Same but values are printed without escaping.
|
|
*/
|
|
class VerticalRawRowOutputStream final : public VerticalRowOutputStream
|
|
{
|
|
public:
|
|
VerticalRawRowOutputStream(WriteBuffer & ostr_, const Block & sample_, const Context & context)
|
|
: VerticalRowOutputStream(ostr_, sample_, context) {}
|
|
|
|
protected:
|
|
void writeValue(const IColumn & column, const IDataType & type, size_t row_num) const override;
|
|
};
|
|
|
|
}
|
|
|