order of solutions on backtracking

I have a database consisting, among other things, of a large number of facts with different predicates.  I need to run a query that can be satisfied either by 
pred1(arguments)
or 
pred2(arguments).

If I submit the query:
?- pred1(arguments); pred2(arguments).
on backtracking, this will generate all solutions with pred1 first, and then all solutions with pred2.

What I need is all the solutions with either predicate in the PRECISE order in which they appear in the database.
One way to accomplish this would be using clause/3 to get the references for all solutions, then use clause_property/2
to get their location within the file, and sort them by location.  

My question here is this: is there a "cleaner/more elegant" solution to this problem?

--
Fernando Guzman
[email protected]





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