@Override
    public Mono<Long> getRowsUpdated() {
        return this.segments.filter(segment -> segment instanceof UpdateCount)
                .cast(UpdateCount.class)
                .map(UpdateCount::value)
                .reduce(Long::sum);
    }
Returns updated count(written rows from summary of {@link ClickHouseResponse}).Important! if writtenRows is greater than MAX_INT then it will return MAX_INT.

@return updated count
clickhouse-r2dbc/src/main/java/com/clickhouse/r2dbc/ClickHouseResult.java