Request Set and SQL statement type parameter from back end submission

Hi All,

I want to submit a request set from back end and I can do it without any issues when request set program have constant type of parameters. I couldn't figure out how to pass the parameter value when it is of type sql statement from back end. Kindly advise if anyone has encountered the same issue.

In the below screen you can see how the parameter is defined I have to pass the value of this select statement while submitting request set from back end.