presto-main/src/main/java/io/prestosql/operator/scalar/MathFunctions.java/MathFunctions/ceilingFloat
class MathFunctions:    @Description("round up to nearest integer")
    @ScalarFunction(value = "ceiling", alias = "ceil")
    @SqlType(StandardTypes.REAL)
    public static long ceilingFloat(@SqlType(StandardTypes.REAL) long num)
    {
        return floatToRawIntBits((float) ceiling(intBitsToFloat((int) num)));
    }