Hi Fabio

I do not understand the significance of this.

>Mike,
>
>VFP optimization have concept of deterministic/ not deterministic functions.
>
>

>CREATE CURSOR randCursor ( F1 I DEFAULT 2015,F2 C(10) DEFAULT SYS(F1))
>FOR K=1 TO 100
>  APPEND BLANK
>NEXT
>INDEX ON F2 		TAG TAGSYS2
>INDEX ON SYS(F1)	TAG TAGSYS1
>
>CLEAR
>
>SYS(3054,11)
>SELECT * FROM randCursor WHERE F2=SYS(F1)
>

>
>Fabio