presto-tpch/src/main/java/io/prestosql/plugin/tpch/TpchMetadata.java/TpchMetadata/toColumnStatistics
class TpchMetadata:    private ColumnStatistics toColumnStatistics(ColumnStatisticsData stats, Type columnType)
    {
        return ColumnStatistics.builder()
                .setNullsFraction(Estimate.zero())
                .setDistinctValuesCount(stats.getDistinctValuesCount().map(Estimate::of).orElse(Estimate.unknown()))
                .setDataSize(stats.getDataSize().map(Estimate::of).orElse(Estimate.unknown()))
                .setRange(toRange(stats.getMin(), stats.getMax(), columnType))
                .build();
    }