Abap 利用对应无环映射平面结构

我在ABAP7.4SP13上

我想在下面的代码中使用选项2，但是如何进行这种深度映射呢？这里的目标是创建一个干净、简单、易于阅读的映射，避免循环

TYPES:
    BEGIN OF ty_s_audit,                   
      CreatedBy           TYPE ernam,
      LastChangedBy       TYPE aenam,
    END OF ty_s_audit,
    BEGIN OF ty_s_equipment,
      EquipmentId           TYPE equi-equnr,
      Audit                 TYPE ty_s_audit BOXED,
    END OF ty_s_equipment,
    ty_t_equipment TYPE STANDARD TABLE OF ty_s_equipment WITH KEY PRIMARY_KEY COMPONENTS EquipmentId.

DATA: lt_equipments TYPE ty_t_equipment.

  SELECT equnr, ernam, aenam FROM equi INTO TABLE @DATA(lt_equi).

  "Option 1:
  LOOP AT lt_equi ASSIGNING FIELD-SYMBOL(<ls_equi>).
    APPEND INITIAL LINE TO lt_equipments ASSIGNING FIELD-SYMBOL(<ls_equipment>).

    <ls_equipment> = CORRESPONDING #( <ls_equi> MAPPING EquipmentId = EQUNR ).

    <ls_equipment>-Audit = CORRESPONDING #( <ls_equi> MAPPING CreatedBy     = ERNAM
                                                              LastChangedBy = AENAM ).
  ENDLOOP.

  "Option 2:
  lt_equipments = CORRESPONDING #( lt_equi MAPPING EquipmentId          = EQUNR
                                                   “Audit-CreatedBy     = ERNAM
                                                   “Audit-LastChangedBy = AENAM ).

---

那么，下面的解决方案呢

lt_equipments = VALUE #( FOR i IN lt_equi
  (
    equipmentid = i-equnr
    audit-createdby = i-ernam
    audit-lastchangedby = i-aenam
  )
).

或者，如果您真的想在某个地方使用相应的映射，例如

lt_equipments = VALUE #( FOR i IN lt_equi
  (
    equipmentid = i-equnr
    audit = CORRESPONDING #( i MAPPING createdby = ernam lastchangedby = aenam )
  )
).

---

我试着用台线。它不起作用。对应的lt_equi mapping equipmentid=equinr audit=table_line mapping createdby=ernam lastchangedby=aenam。谢谢！第一个非常适合这个用例！