关于多个键控表的CTE索引建议

Question

我有一个关于ChargeID和CustomerID的视图（可以在多个客户之间分配费用）。视图由2个表组成（这里大大简化了，实际表每个有~40列）：

CREATE TABLE tblCharge (ChargeID int NOT NULL, ParentChargeID int)
CREATE TABLE tblChargeShare (ChargeShareID int NOT NULL, ChargeID int NOT NULL, CustomerID int, TotalAmount money, TaxAmount money, DiscountAmount money)

View只是将它们加在一起：

CREATE VIEW vwBASEChargeChargeShareCustomer AS
Select ParentChargeID, b.* from tblCharge a inner join tblChargeShare b on a.ChargeID = b.ChargeID

然后我有一个CTE来获得父母的补贴：

WITH RCTE AS
(
SELECT  ParentChargeId, ChargeID, 1 AS Lvl, ISNULL(TotalAmount, 0) as TotalAmount,  ISNULL(TaxAmount, 0) as TaxAmount,  
ISNULL(DiscountAmount, 0) as DiscountAmount, CustomerID, ChargeID as MasterChargeID
FROM vwBASEChargeChargeShareCustomer Where ParentChargeID is NULL

UNION ALL

SELECT rh.ParentChargeID, rh.ChargeID, Lvl+1 AS Lvl, ISNULL(rh.TotalAmount, 0),  ISNULL(rh.TaxAmount, 0),  ISNULL(rh.DiscountAmount, 0) , rh.CustomerID 
, rc.MasterChargeID 
FROM vwBASEChargeChargeShareCustomer rh
INNER JOIN RCTE rc ON rh.PArentChargeID = rc.ChargeID and rh.CustomerID = rc.CustomerID )

Select MasterChargeID, CustomerID, ParentChargeID, ChargeID, TotalAmount, TaxAmount, DiscountAmount , Lvl
FROM  RCTE r 

因此，CTE正在加入CustomerID和ChargeID = ParentChargeID

这种方法效果很好，但在大型数据集上却表现不佳（数百万次收费）。

索引表（或视图）以获得最佳性能的最佳方法是什么？ （SQL 2008R2及以上版本）