循环展BOM

展开BOM的时候，半成品组件的数量，不会跟着变，或许有其它方法

这里每次展开1层，写了个循环调用。直接调用接口就好了。

CALL FUNCTION 'Z_RFC_PP_BOM_EXPL'
      EXPORTING
        p_aufsw  = 'X'
        p_capid  = 'PP01'
        p_datuv  = sy-datum
        p_matnr  = gs_output-matnr
        p_stlan  = gs_output-stlan
        p_stlal  = gs_output-stlal
        p_bmeng  = gs_output-bmeng
        p_werks  = gs_output-werks
*       p_histu  = p_histu3 "stufe
*          IMPORTING
*       ls_cstmat = ls_cstmat
*       p_histu2 = p_histu4
      TABLES
        it_stpox = gt_stpox.

*"----------------------------------------------------------------------
*"*"本地接口：
*"  IMPORTING
*"     VALUE(P_AUFSW) TYPE  CSDATA-XFELD DEFAULT 'X'
*"     VALUE(P_CAPID) TYPE  TC04-CAPID DEFAULT 'PP01'
*"     VALUE(P_DATUV) TYPE  STKO-DATUV DEFAULT SY-DATUM
*"     VALUE(P_MATNR) TYPE  MARA-MATNR OPTIONAL
*"     VALUE(P_STLAN) TYPE  STZU-STLAN OPTIONAL
*"     VALUE(P_STLAL) TYPE  STKO-STLAL OPTIONAL
*"     VALUE(P_BMENG) TYPE  STKO-BMENG OPTIONAL
*"     VALUE(P_WERKS) TYPE  MARC-WERKS OPTIONAL
*"     VALUE(P_HISTU) TYPE  HISTU DEFAULT '1'
*"  EXPORTING
*"     VALUE(LS_CSTMAT) TYPE  CSTMAT
*"     VALUE(P_HISTU2) TYPE  HISTU
*"  TABLES
*"      IT_STPOX STRUCTURE  STPOX OPTIONAL
*"      IT_CSCMAT STRUCTURE  CSCMAT OPTIONAL
*"----------------------------------------------------------------------
  DATA: lt_stpox  LIKE TABLE OF stpox,
        lt_stpox2 LIKE TABLE OF stpox,
        ls_stpox  LIKE stpox,
        ls_stpox2 LIKE stpox,
        p_histu3  TYPE histu,
        p_histu4  TYPE histu.
*  ADD 1 TO p_histu.
  p_histu2 = p_histu + 1.
  CALL FUNCTION 'CS_BOM_EXPL_MAT_V2' "展开BOM
    EXPORTING
      aufsw                 = p_aufsw "'X'
      capid                 = p_capid "'PP01' "checkb  "BOM应用
      datuv                 = p_datuv "sy-datum   "有效起始日
      mtnrv                 = p_matnr "gs_output-matnr    "展开物料号
      postp                 = ' '    "项目类别（物料单）
      stlan                 = p_stlan    "BOM用途
      stlal                 = p_stlal "可选的BOM
      werks                 = p_werks    "工厂
      emeng                 = p_bmeng    "数量  gsmng计划订单总数量   bdmng需求量
      mehrs                 = '' "X为多层展开
    IMPORTING
      topmat                = ls_cstmat
*     DSTST                 =
    TABLES
      stb                   = lt_stpox
      matcat                = it_cscmat
    EXCEPTIONS
      alt_not_found         = 1
      call_invalid          = 2
      material_not_found    = 3
      missing_authorization = 4
      no_bom_found          = 5
      no_plant_data         = 6
      no_suitable_bom_found = 7
      conversion_error      = 8
      OTHERS                = 9.
  IF sy-subrc EQ 0.
    LOOP AT lt_stpox INTO ls_stpox.
      CLEAR:lt_stpox2[].
      ls_stpox-stufe = p_histu2.
      APPEND ls_stpox TO it_stpox[].
      IF ls_stpox-xtlty NE ''.
        p_histu3 = p_histu2.
        CALL FUNCTION 'Z_RFC_PP_BOM_EXPL'
          EXPORTING
            p_aufsw   = 'X'
            p_capid   = 'PP01'
            p_datuv   = sy-datum
            p_matnr   = ls_stpox-idnrk
            p_stlan   = ls_stpox-stlan
            p_stlal   = ls_stpox-stlal
            p_bmeng   = ls_stpox-mngko
            p_werks   = ls_stpox-werks
            p_histu   = p_histu3 "stufe
          IMPORTING
            ls_cstmat = ls_cstmat
            p_histu2  = p_histu4
          TABLES
            it_stpox  = lt_stpox2.
        LOOP AT lt_stpox2 INTO ls_stpox2.
          ls_stpox2-stufe = p_histu4.
          APPEND ls_stpox2 TO it_stpox[].
          CLEAR: ls_stpox2.
        ENDLOOP.
      ENDIF.
      CLEAR ls_stpox.
    ENDLOOP.
  ENDIF.