--- ABS-118509
ALTER TABLE CONTRACT DROP CONSTRAINT PURCHASEORDERTYPE_VALID1_1;
ALTER TABLE CONTRACT ADD CONSTRAINT CHK_CONTRACT_PURCHASEORDERTYPE CHECK (PURCHASEORDERTYPE IN (0,1,2,3,4,5));
COMMENT ON COLUMN CONTRACT.PURCHASEORDERTYPE 
        IS '0 = Invoice (default) 
        1 = Product 
        2 = Product and Service (USPS) 
        3 = Invoice and Line Type 
        4 = Product and Line Type 
        5 = Reference only - no tracking';
