So if I understand you correctly, you basically want a dynamic where clause in your stored procedure. Something like
where campaign ='mycampaign' and (segment='seg1' or segment='seg1=2' or ...... or segment='segN')
If so, have you considered to use something like
where campaign ='mycampaign' and segment in ('seg1', 'seg2')or if it's getting more complex to use a dynamic stored procedure that builds the where clause based on the content of the parameters.
