presto-main/src/main/java/io/prestosql/type/BigintOperators.java/BigintOperators/castToReal
class BigintOperators:    @ScalarOperator(CAST)
    @SqlType(StandardTypes.REAL)
    public static long castToReal(@SqlType(StandardTypes.BIGINT) long value)
    {
        return (long) floatToRawIntBits((float) value);
    }