ClickHouse/dbms/src/DataStreams/BlockOutputStreamFromRowOutputStream.cpp

#include <Core/Block.h>
#include <DataStreams/BlockOutputStreamFromRowOutputStream.h>


namespace DB
{

BlockOutputStreamFromRowOutputStream::BlockOutputStreamFromRowOutputStream(RowOutputStreamPtr row_output_)
    : row_output(row_output_), first_row(true) {}


void BlockOutputStreamFromRowOutputStream::write(const Block & block)
{
    size_t rows = block.rows();
    size_t columns = block.columns();

    for (size_t i = 0; i < rows; ++i)
    {
        if (!first_row)
            row_output->writeRowBetweenDelimiter();
        first_row = false;

        row_output->writeRowStartDelimiter();

        for (size_t j = 0; j < columns; ++j)
        {
            if (j != 0)
                row_output->writeFieldDelimiter();

            auto & col = block.getByPosition(j);
            row_output->writeField(*col.column.get(), *col.type.get(), i);
        }

        row_output->writeRowEndDelimiter();
    }
}


void BlockOutputStreamFromRowOutputStream::setRowsBeforeLimit(size_t rows_before_limit)
{
    row_output->setRowsBeforeLimit(rows_before_limit);
}

void BlockOutputStreamFromRowOutputStream::setTotals(const Block & totals)
{
    row_output->setTotals(totals);
}

void BlockOutputStreamFromRowOutputStream::setExtremes(const Block & extremes)
{
    row_output->setExtremes(extremes);
}

void BlockOutputStreamFromRowOutputStream::onProgress(const Progress & progress)
{
    row_output->onProgress(progress);
}

}