mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-15 02:41:59 +00:00
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
#pragma once
|
|
|
|
#include <string>
|
|
#include <Core/Block.h>
|
|
#include <Processors/Formats/IOutputFormat.h>
|
|
#include <Formats/FormatSettings.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
class WriteBuffer;
|
|
|
|
|
|
/** A data format designed to simplify the implementation of the ODBC driver.
|
|
* ODBC driver is designed to be build for different platforms without dependencies from the main code,
|
|
* so the format is made that way so that it can be as easy as possible to parse it.
|
|
* A header is displayed with the required information.
|
|
* The data is then output in the order of the rows. Each value is displayed as follows: length in Int32 format (-1 for NULL), then data in text form.
|
|
*/
|
|
class ODBCDriver2BlockOutputFormat final : public IOutputFormat
|
|
{
|
|
public:
|
|
ODBCDriver2BlockOutputFormat(WriteBuffer & out_, const Block & header_, const FormatSettings & format_settings_);
|
|
|
|
String getName() const override { return "ODBCDriver2BlockOutputFormat"; }
|
|
|
|
std::string getContentType() const override
|
|
{
|
|
return "application/octet-stream";
|
|
}
|
|
|
|
private:
|
|
void consume(Chunk) override;
|
|
void consumeTotals(Chunk) override;
|
|
void writePrefix() override;
|
|
|
|
const FormatSettings format_settings;
|
|
Serializations serializations;
|
|
|
|
void writeRow(const Columns & columns, size_t row_idx, std::string & buffer);
|
|
void write(Chunk chunk, PortKind port_kind);
|
|
};
|
|
|
|
|
|
}
|