ALTER TABLE CAIXA ADD IDSOLIMPCUPFIS VARCHAR2(1) NULL
    CONSTRAINT CKC_IDSOLIMPCUPFIS_CAIXA CHECK (IDSOLIMPCUPFIS IN ('S','N')) 
/
ALTER TABLE CAIXA ADD IDBTNIMPCUPFIS VARCHAR2(1) NULL
    CONSTRAINT CKC_IDBTNIMPCUPFIS_CAIXA CHECK (IDBTNIMPCUPFIS IN ('S','N')) 
/