获得商品可用库存 BAPI_MATERIAL_AVAILABILITY

业务场景：零售业务，POS系统发起请货单，SAP执行对应的配货逻辑
以下代码为程序在的一个perform，仅供参考：

DATA:ls_wmdvex LIKE bapiwmdve, "可用库存获取函数变量
     lt_wmdvsx LIKE  STANDARD TABLE OF bapiwmdvs,
     lt_wmdvex LIKE  STANDARD TABLE OF bapiwmdve.

DATA:BEGIN OF lt_kykc OCCURS 0,
       bukrs TYPE t001-bukrs,
       werks TYPE ztmm_gy_allot-werks,
       lgort TYPE ztmm_gy_allot-lgort,
       matnr TYPE mara-matnr,
       meins TYPE mara-meins,
       zkxkc TYPE bapiwmdve-com_qty, "可销库存
     END OF lt_kykc.

FORM fm_get_stockdata .
  "获取可用库存
  MOVE-CORRESPONDING gt_alv_data[] TO lt_kykc[].
  SORT lt_kykc BY bukrs matnr werks lgort.
  DELETE ADJACENT DUPLICATES FROM lt_kykc
 COMPARING bukrs matnr werks lgort .
  LOOP AT lt_kykc.
    SELECT SINGLE meins FROM mara
      INTO lt_kykc-meins
      WHERE matnr = lt_kykc-matnr.
    REFRESH:lt_wmdvex,lt_wmdvsx.

    CALL FUNCTION 'BAPI_MATERIAL_AVAILABILITY'
      EXPORTING
        plant    = lt_kykc-werks "'9050/9051/9052'
        material = lt_kykc-matnr
        unit     = lt_kykc-meins
        stge_loc = lt_kykc-lgort "'1000'
      TABLES
        wmdvsx   = lt_wmdvsx
        wmdvex   = lt_wmdvex.

    lt_kykc-zkxkc = 0.
    LOOP AT lt_wmdvex INTO ls_wmdvex.
      lt_kykc-zkxkc = lt_kykc-zkxkc + ls_wmdvex-com_qty."总可用库存
    ENDLOOP.
    MODIFY lt_kykc.
  ENDLOOP.

ENDFORM.```