币别转换函数
CALL FUNCTION 'CONVERT_TO_LOCAL_CURRENCY'
EXPORTING
date = p_date
foreign_amount = p_netwr
foreign_currency = p_waerk
local_currency = p_waers
IMPORTING
local_amount = p_netwr
EXCEPTIONS
no_rate_found = 1
overflow = 2
no_factors_found = 3
no_spread_found = 4
derived_2_times = 5
OTHERS = 6.
IF sy-subrc <> 0.
MESSAGE ID sy-msgid TYPE 'S' NUMBER sy-msgno
WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
ENDIF.