**Use case**
Import binary data as a single row single column of String or similar type.
It will just read all input as a single value.

Loading large blobs as well as loading data by single rows are typical anipatterns in ClickHouse.
But sometimes it is needed.
++balance;
                ++buf.position();
            }
            else if (*buf.position() == '}')
            {
                --balance;
                ++buf.position();
            }
            else if (*buf.position() == '\\')
            {
                ++buf.position();
                if (!buf.eof())
                {
                    ++buf.position();
                }
            }
            else if (*buf.position() == '"')
            {
                quotes = true;
                ++buf.position();
            }
        }
    }
    buf.makeContinuousMemoryFromCheckpointToPos();
    char * end = buf.position();
    buf.rollbackToCheckpoint();
    column.insertData(buf.position(), end - buf.position());
    buf.position() = end;
}
bool JSONAsStringRowInputFormat::readRow(MutableColumns & columns, RowReadExtension &)