query = "SELECT r0.query_id FROM %s WHERE %s"
        frm = ', '.join('rr_criteria r%d' % (i,) for i in range(len(criteria
s)+1))
        where = ' AND '.join("r0.query_id = r%(i)d.query_id AND "\
                              "r%(i)d.type_id = %(type_id)d AND "\
                              "r%(i)d.value = '%(value)s'" % {
                                  'i': i+1,
                                  'type_id': c.type.id,
                                  'value': c.value.replace("'","\'")
                              } for i,c in enumerate(criterias))