ALTER TABLE RELAT_CDRS
   DROP CONSTRAINT FKFAT00125SERVCLIE
/
ALTER TABLE RELAT_CDRS
   ADD CONSTRAINT FKFAT00125SERVCLIE FOREIGN KEY (CDCLIENTE, CDFILIAL, CDSERVFILI)
      REFERENCES SERVCLIE (CDCLIENTE, CDFILIAL, CDSERVFILI) ON DELETE CASCADE 