Treat every line of input as a single String field.
Similar to `JSONAsString`.
#include <Processors/Formats/Impl/LineAsStringRowInputFormat.h>
#include <Formats/JSONEachRowUtils.h>
#include <common/find_symbols.h>
#include <IO/ReadHelpers.h>
namespace DB
{
namespace ErrorCodes
{
    extern const int LOGICAL_ERROR;
    extern const int INCORRECT_DATA;
}
LineAsStringRowInputFormat::LineAsStringRowInputFormat(const Block & header_, ReadBuffer & in_, Params params_) :
    IRowInputFormat(header_, in_, std::move(params_)), buf(in)
{
    if (header_.columns() > 1 || header_.getDataTypes()[0]->getTypeId() != TypeIndex::String)
    {
        throw Exception("This input format is only suitable for tables with a single column of type String.", ErrorCodes::LOGICAL_ERROR);
    }
}
void LineAsStringRowInputFormat::resetParser()