將xml作為輸入參數傳遞給存儲過程

1 查看存儲過程的方式

  

  exec sp_helptext 'GetTrackingFeedLogByMaxId'



  select definition from sys.sql_modules
  where object_id=(OBJECT_ID(N'GetTrackingFeedLogByMaxId'))

2 在調用有輸入參數的存儲過程時必須包含參數，除非參數有默認值

3 系統存儲過程sp_xml_preparedocument和OPENXML函數來操作傳入的xml文檔

DECLARE @XMLDocHandle int

declare @xml varchar(1000)='<ROOT>
  <CurrencyList FromCurrencyCode="USD" ToCurrencyCode="AUD"></CurrencyList>
  <CurrencyList FromCurrencyCode="USD" ToCurrencyCode="EUR"></CurrencyList>
  <CurrencyList FromCurrencyCode="USD" ToCurrencyCode="GBP"></CurrencyList>
  <CurrencyList FromCurrencyCode="USD" ToCurrencyCode="MXN"></CurrencyList>
</ROOT>
'

execute sp_xml_preparedocument @XMLDocHandle output,@xml

SELECT FromCurrencyCode,ToCurrencyCode
FROM OPENXML(@XMLDocHandle,'/ROOT/CurrencyList',1)
       WITH
       (
         FromCurrencyCode char(3),
         ToCurrencyCode char(3)
       )

注意變量必須定義為@XMLDocHandle變量

執行效果如下

3 xml作為存儲過程的參數示例

--將xml作為存儲過程的輸入參數
create procedure getCurrentRatesXML
@XMLList varchar(1000),
@CurrencyRateDate datetime

AS
declare @XMLDocHandle int
declare @CurrencyCodeTable table
(
  FromCurrencyCode char(3),
  ToCurrencyCode char(3)
)

--准備xml文檔
execute sp_xml_preparedocument @XMLDocHandle output,@XMLList;

INSERT INTO @CurrencyCodeTable(FromCurrencyCode,ToCurrencyCode)
SELECT FromCurrencyCode,ToCurrencyCode
FROM OPENXML(@XMLDocHandle,'/ROOT/CurrencyList',1)
       WITH
       (
         FromCurrencyCode char(3),
         ToCurrencyCode char(3)
       );

SELECT *
FROM Sales.CurrencyRate cr
     JOIN @CurrencyCodeTable TVP
     ON cr.FromCurrencyCode=TVP.FromCurrencyCode
     AND cr.ToCurrencyCode=TVP.ToCurrencyCode
WHERE CurrencyRateDate=@CurrencyRateDate;

--移除文檔
execute sp_xml_removedocument @XMLDocHandle;
go