presto-benchmark/src/main/java/io/prestosql/benchmark/StatisticsBenchmark.java/LongVarianceBenchmark/LongVarianceBenchmark
class LongVarianceBenchmark:        public LongVarianceBenchmark(LocalQueryRunner localQueryRunner)
        {
            super(localQueryRunner, "stat_long_variance", 25, 150, "select var_samp(orderkey) from orders");
        }