declare
    object_exists exception;
    pragma exception_init (object_exists , -02275);
begin
	execute immediate 'ALTER TABLE PTOVTA_EMPRESA_CONTABANCARIA ADD FOREIGN KEY (EMPRESACONTABANCARIA_ID) REFERENCES EMPRESA_CONTABANCARIA (EMPRESACONTABANCARIA_ID)';
    exception when object_exists then null;
end;
/

declare
    object_exists exception;
    pragma exception_init (object_exists , -02260);
begin
	execute immediate 'ALTER TABLE PTOVTA_EMPRESA ADD CONSTRAINT PTOVTA_EMPRESA_PK PRIMARY KEY (PTOVTAEMPRESA_ID)';
    exception when object_exists then null;
end;
/

declare
    object_exists exception;
    pragma exception_init (object_exists , -02275);
begin
	execute immediate 'ALTER TABLE PTOVTA_EMPRESA_CONTABANCARIA ADD FOREIGN KEY (PTOVTAEMPRESA_ID) REFERENCES PTOVTA_EMPRESA (PTOVTAEMPRESA_ID)';
    exception when object_exists then null;
end;