ClickHouse/dbms/src/Formats/ValuesRowOutputStream.cpp

#include <Formats/ValuesRowOutputStream.h>
#include <Formats/FormatFactory.h>
#include <Formats/BlockOutputStreamFromRowOutputStream.h>

#include <IO/WriteHelpers.h>
#include <Columns/IColumn.h>
#include <DataTypes/IDataType.h>


namespace DB
{


ValuesRowOutputStream::ValuesRowOutputStream(WriteBuffer & ostr_, const FormatSettings & format_settings)
    : ostr(ostr_), format_settings(format_settings)
{
}

void ValuesRowOutputStream::flush()
{
    ostr.next();
}

void ValuesRowOutputStream::writeField(const IColumn & column, const IDataType & type, size_t row_num)
{
    type.serializeAsTextQuoted(column, row_num, ostr, format_settings);
}

void ValuesRowOutputStream::writeFieldDelimiter()
{
    writeChar(',', ostr);
}

void ValuesRowOutputStream::writeRowStartDelimiter()
{
    writeChar('(', ostr);
}

void ValuesRowOutputStream::writeRowEndDelimiter()
{
    writeChar(')', ostr);
}

void ValuesRowOutputStream::writeRowBetweenDelimiter()
{
    writeCString(",", ostr);
}


void registerOutputFormatValues(FormatFactory & factory)
{
    factory.registerOutputFormat("Values", [](
        WriteBuffer & buf,
        const Block & sample,
        const Context &,
        const FormatSettings & settings)
    {
        return std::make_shared<BlockOutputStreamFromRowOutputStream>(
            std::make_shared<ValuesRowOutputStream>(buf, settings), sample);
    });
}

}