DO $$
BEGIN
  ALTER TABLE CATEGORIA_DESCUENTO ADD 
    				(INDCANCELAEMABERTO NUMBER(1,0), 
    				INDDEVOLVEEMABERTO NUMBER(1,0),
    				INDCANCELAEMERGENCIALAEMABERTO NUMBER(1,0),
    				INDTROCATITULARIDADEEMABERTO NUMBER(1,0),
    				INDTROCAEMABERTO NUMBER(1,0),
    				INDPERMITECANCELAR NUMBER(1,0),
    				INDPERMITEDEVOLVER NUMBER(1,0),
                    INDPERMITECANCELAREMERGENCIAL NUMBER(1,0),
                    INDPERMITETROCATITULARIDADE NUMBER(1,0),
                    INDPERMITEREATIVAR NUMBER(1,0));
  EXCEPTION WHEN duplicate_column THEN NULL;
END
$$;