                       ('L_EXTENDEDPRICE' , 'double'),
                       ('L_DISCOUNT'      , 'double'),
                       ('L_TAX'           , 'double'),
                       ('L_RETURNFLAG'    , 'char(1)'),
                       ('L_LINESTATUS'    , 'char(1)'),
                       ('L_SHIPDATE'      , 'int'),   # date
                       ('L_COMMITDATE'    , 'int'),   # date
                       ('L_RECEIPTDATE'   , 'int'),   # date
                       ('L_SHIPINSTRUCT'  , 'char(25)'),
                       ('L_SHIPMODE'      , 'char(10)'),
