presto-main/src/main/java/io/prestosql/operator/scalar/MathFunctions.java/MathFunctions/ceiling
class MathFunctions:    @Description("round up to nearest integer")
    @ScalarFunction(alias = "ceil")
    @SqlType(StandardTypes.DOUBLE)
    public static double ceiling(@SqlType(StandardTypes.DOUBLE) double num)
    {
        return Math.ceil(num);
    }