SQL Alias within RPG

Can I do this in freeform RPG for a multimember file where the member is not
known at compile time:

Exec SQL  Create Alias SALES for SLSHST(:mbr);

WDSC balks at it.  If I remove the : it accepts it, but that means the
member name is hardcoded as "mbr" which is not at all what I want.

Do I need to create the alias in a CL wrapper?

*OR*, since every record in the member is going to be processed, am I better
off copying that member only to QTEMP/SALES in a CL wrapper?

*OR* Am I making this harder than it needs to be? <g>

Thanks.