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  method GET_CUSTOMER.
   DATA: zlt TYPE table OF ZGT_CUSTOMER,    "定义内表
      zlv TYPE ZGT_CUSTOMER.                "定义结构体变量

   IF IS_CUST_KEY IS NOT INITIAL.
     select * from ZMAST_CUST INTO TABLE zlt where CUSTNO = '00009'.
   ELSE.
   ENDIF.
   IF SY-SUBRC = 0.
     loop at zlt into zlv.  "将内表中的数据取出，赋值给结构体。
*     IF <data>-NEW EQ 'C' OR <data>-NEW EQ 'M'.
       MOVE-CORRESPONDING zlv TO es_cust_attr.  " move-corresponding a to b. "a和b的类型必须相同。
       RETURN.
     ENDLOOP.
*     ENDIF.
   ENDIF.
  endmethod.