presto-main/src/main/java/io/prestosql/operator/aggregation/VarianceAggregation.java/VarianceAggregation/bigintInput
class VarianceAggregation:    @InputFunction
    public static void bigintInput(@AggregationState VarianceState state, @SqlType(StandardTypes.BIGINT) long value)
    {
        updateVarianceState(state, (double) value);
    }