獲取採購訂單中稅碼對應百分比數值

採購訂單、發票校驗、會計憑證中有稅碼，需要獲取其對應的百分比，

數據存儲再A003和KONP中，創建如下視圖：

@AbapCatalog.sqlViewName: 'ZSDV_R025_003_V'
@AbapCatalog.compiler.compareFilter: true
@AccessControl.authorizationCheck: #CHECK
@EndUserText.label: '稅碼的百分比清單'
define view ZSDV_R025_003_E
  as select from a003 as a
    inner join   konp as b on  a.mandt = b.mandt
                           and a.knumh = b.knumh
{
  a.mandt,
  a.mwskz,
  b.kbetr
}
where
      a.kappl = 'TX'
  and a.kschl = 'MWVS'
  and a.aland = 'CN' 

實際使用時，獲取的百分比數值需要除以1000