>I never wondered about that situation but I thought I would ask for feedback. Basically, it never caused me any problem but here is the situation.
>
>When doing a SQL, such as:
>
>

>SELECT MyField FROM Parent;
> INNER JOIN Child ON Parent.Numero=Child.ParentNumero;
> INTO CURSOR Temp
>

>
>Assuming Parent.Numero is having a type of Integer and Child.ParentNumero is having a type of Numeric(6), would that be optimized? So, in order to be fully optimized, should the types be all the same?

You can use SYS(3054,11) to display the level of optimization.