Em todos os outros casos, os argumentos são comparados como números de ponto flutuante (reais). - https://dev.mysql.com/doc/ refman/5.7/en/type-conversion.html
por exemplo
drop procedure if exists p;
delimiter $$
create procedure p (inval float, inval2 float, inval3 float)
select inval,inval2,inval3;
call p(6011656821812318924,6011656821812318925,6011656821812318926);
+------------+------------+------------+
| inval | inval2 | inval3 |
+------------+------------+------------+
| 6.01166e18 | 6.01166e18 | 6.01166e18 |
+------------+------------+------------+
1 row in set (0.00 sec)
