SQL cursor defined two different ways?

Folks:

I'm wondering if this is possible ... so far the compiler is saying no.

I have a two different queries that return the same type of data. I would like to be able declare a cursor for the two different queries, conditional on a parameter, and then just spin through the results.

Here's a mock-up of what I would like to do...

if var1 <> *blank;
exec sql
declare myCursor cursor for
select FIELD2
from FILE1
where FIELD1 = :var1;
else;
exec sql
declare myCursor cursor for
select FIELD2
from FILE1
inner join FILE2
on FILE1.FIELD3 = FILE2.FIELD4
where FIELD5 = var2;
endif;

When I compile, I get a message about a duplicate cursor.

Is there any way to accomplish what I want?

Thanks!

david