select er.reg_id, person__name(er.user_id) as name, er.user_id, pa.email, er.reg_state, ao.creation_date from events_registrations er, parties pa, acs_objects ao where er.user_id = pa.party_id and er.event_id = :event_id and reg_state <> 'canceled' and er.reg_id = ao.object_id select er.reg_id, person__name(er.user_id) as name, er.user_id, pa.email, er.reg_state, ao.creation_date from events_registrations er, parties pa, acs_objects ao where er.user_id = pa.party_id and er.event_id = :event_id and reg_state = :specific_reg_type and er.reg_id = ao.object_id