How to populate customer_exit variable in a query

HI,

I'm having 2 queries in a Web template.

Query Q1 has user input variable (v1) while Query Q2 has customer exit variable (v2).

In the customer_exit, my logic is to populate v2 using v1.

The above arrangement will work provided the query execution order is Q1 followed by Q2.

However when i run the report, Q2 executes first and then Q1.

How do i ensure the query execution order is Q1, Q2 and not Q2, Q1.

Regards,

Nagendra.