SSIS: Lookup组件高级用法,生成推断成员(inferred member)

USE [BIHell_demo]
GO
/****** Object:  StoredProcedure [dbo].[Generate_ResellerKey]    Script Date: 5/20/2015 10:37:44 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[Generate_ResellerKey]
  @Store NVARCHAR(15) -- Business key
AS 
SET NOCOUNT ON

/* Prevent race conditions */ 
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE

/* Ensure key does not exist */
DECLARE @ResellerKey INT 
SELECT @ResellerKey = ResellerKEy
FROM dw.DimReseller 
WHERE ResellerAlternateKey = @Store

/* Generate new surrogate key for inferred member */ 
IF @ResellerKey IS NULL BEGIN 
  

  INSERT [dw].[DimReseller]
           ([ResellerAlternateKey]
           ,[BusinessType]
           ,[ResellerName]
           ,[NumberEmployees]
           ,[FirstOrderYear]
           ,[LastOrderYear]
           ,[ProductLine]
           ,[AddressLine1]
           ,[AddressLine2]
           ,[City]
           ,[StateProvinceCode]
           ,[PostalCode]
           ,[AnnualSales]
           ,[BankName]
           ,[AnnualRevenue]
           ,[YearOpened]
           ,[Current]
           ,[Inferred])
     VALUES
           (@Store
           ,‘Unknown‘
           ,‘Unknown‘
           ,null
           ,null
           ,null
           ,null
           ,null
           ,null
           ,null
           ,null
           ,null
           ,null
           ,null
           ,null
           ,null
           ,1
           ,1)
  SET @ResellerKey = SCOPE_IDENTITY() 
END

/* Return surrogate and business key */ 
SELECT @ResellerKey AS ResellerKey, @Store AS ResellerAlternateKey