presto-orc/src/main/java/io/prestosql/orc/metadata/statistics/LongDecimalStatisticsBuilder.java/LongDecimalStatisticsBuilder/buildDecimalStatistics
class LongDecimalStatisticsBuilder:    private Optional<DecimalStatistics> buildDecimalStatistics()
    {
        if (nonNullValueCount == 0) {
            return Optional.empty();
        }
        checkState(minimum != null && maximum != null);
        return Optional.of(new DecimalStatistics(minimum, maximum, LONG_DECIMAL_VALUE_BYTES));
    }