DO $$
BEGIN
  ALTER TABLE PRICING_ESPECIFICO ADD (DATAINICIOVIAGEM DATE, DATAFIMVIAGEM DATE, DATAINICIOVENDA DATE, DATAFIMVENDA DATE,
		DOMINGO NUMBER(1,0), SEGUNDA NUMBER(1,0), TERCA NUMBER(1,0), QUARTA NUMBER(1,0), QUINTA NUMBER(1,0), SEXTA NUMBER(1,0), SABADO NUMBER(1,0));
  EXCEPTION WHEN duplicate_column THEN NULL;
END
$$;