实现ME22N行项目复制包含外挂栏位

ME22N行项目复制包含外挂栏位实现
Enhancement for ME22N item copy include customize columns

改動兩個地方(Two places need to be changed)：

1,  ZXM06U41

     如果當前的user command為copy時，將當前畫面的PO item外送到MEMEORY ID中。

   (When user command is Item copy,export PO item screen data to MEMORY ID)

  IF sy-ucomm = 'MEPO1211ITEMCOPY'.
    export gt_ekpo TO MEMORY ID 'ZMEPOITEM' .
  ENDIF.

2,修改class interface ZCL_IM_ZME_PROCESS_PO_CUST的method IF_EX_ME_PROCESS_PO_CUST~PROCESS_ITEM(implement po badi)

   如果當前user command為item復制，從MEMEORY ID中讀取畫面的PO項次。

  (When user command is item copy,import data from memory ID from step1 )

   然后根據復制item的來源item，讀取對應的外挂 tax code，并且填入到新item中并save。

  ( read add-on tax code from source item,and fill in new items)

  DATA: lw_mepoitem TYPE mepoitem.
  DATA lt_ekpo TYPE TABLE OF ekpo.
  DATA lw_ekpo TYPE ekpo.

  IF sy-ucomm = 'MEPO1211ITEMCOPY'.
    IMPORT gt_ekpo TO lt_ekpo FROM MEMORY ID 'ZMEPOITEM' .
    lw_mepoitem = im_item->get_data( ).

    READ TABLE lt_ekpo INTO lw_ekpo
                       WITH KEY ebeln = lw_mepoitem-refbs
                                ebelp = lw_mepoitem-refps.
    IF sy-subrc = 0.
      lw_mepoitem-zbs_mwskz = lw_ekpo-zbs_mwskz.
      im_item->set_data( lw_mepoitem ).
    ENDIF.
  ENDIF.