Indexed views using indexes on base table

Question

Hi all,
CREATE VIEW Sales.vOrders
WITH SCHEMABINDING
AS
SELECT SUM(UnitPrice*OrderQty*(1.00-UnitPriceDiscount)) AS Revenue,
OrderDate, ProductID, COUNT_BIG(*) AS COUNT
FROM Sales.SalesOrderDetail AS od, Sales.SalesOrderHeader AS o
WHERE od.SalesOrderID = o.SalesOrderID
GROUP BY OrderDate, ProductID;
GO
--Create an index on the view.
CREATE UNIQUE CLUSTERED INDEX IDX_V1
ON Sales.vOrders (OrderDate, ProductID);
GO
--This query can use the indexed view even though the view is
--not specified in the FROM clause.
SELECT SUM(UnitPrice*OrderQty*(1.00-UnitPriceDiscount)) AS Rev,
OrderDate, ProductID
FROM Sales.SalesOrderDetail AS od
JOIN Sales.SalesOrderHeader AS o ON od.SalesOrderID=o.SalesOrderID
AND ProductID BETWEEN 700 and 800
AND OrderDate >= CONVERT(datetime,'05/01/2002',101)
GROUP BY OrderDate, ProductID
ORDER BY Rev DESC;
In the above code block, Sales.SalesOrderDetail and Sales.SalesOrderHeader are base tables.
Say suppose there are some indexes on some of the columns of these base tables. Are these indexes used when we write a query in which indexed view is mentioned
in the from clause?
Thanks, Srikar

Answer 1

SO far as its a indexed view it wont use the indexes on base tables when you use it in a query as indexed view is persisted and exists as a physical object. SO it doent require definition to be substituted and data to be retrieved from the base objects.
The indexes will come handy while populating the indexed view.
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