presto-orc/src/main/java/io/prestosql/orc/metadata/statistics/ColumnStatistics.java/ColumnStatistics/getMinAverageValueSizeInBytes
class ColumnStatistics:    public long getMinAverageValueSizeInBytes()
    {
        // it is ok to return 0 if the size does not exist given it is a lower bound
        return minAverageValueSizeInBytes;
    }