MS SQL Server - 如何从CTE创建视图？

Question

with cte as (
    select '2014-03-10 08:00:00' as Dates
    union all
    select '2014-05-11 14:00:00'
)
select * from cte 
join someTable on 1=1 
OPTION (MAXRECURSION 0)

上面的SQL在两个日期之间的所有小时和从另一个表的连接中检索的字段输出就像一个魅力:

2014-03-10 02:00:00    A
2014-03-10 02:00:00    B
2014-03-10 03:00:00    A
2014-03-10 03:00:00    B
...
2014-05-11 13:00:00    A
2014-05-11 13:00:00    B
2014-05-11 14:00:00    A
2014-05-11 14:00:00    B

我想从中创建一个视图,但我没有设法做到这一点.我尝试了几件事但没有成功.以下是返回:Incorrect syntax near the keyword 'OPTION'.

CREATE VIEW viewName as 
with cte as (
    select '2014-03-10 08:00:00' as Dates
    union all
    select '2014-05-11 14:00:00'
)
select * from cte 
join someTable on 1=1 
OPTION (MAXRECURSION 0)

Answer 1

您无法MAXRECURSION在视图中指定选项.

来自http://benchmarkitconsulting.com/colin-stasiuk/2010/04/12/maxrecursion-with-a-cte-in-a-view/:

要使用MAXRECURSION选项,您需要先创建视图,而不使用MAXRECURSION选项:

USE AdventureWorks;
GO
CREATE VIEW vwCTE AS
--Creates an infinite loop
WITH cte (EmployeeID, ManagerID, Title) as
(
    SELECT EmployeeID, ManagerID, Title
    FROM HumanResources.Employee
    WHERE ManagerID IS NOT NULL
  UNION ALL
    SELECT cte.EmployeeID, cte.ManagerID, cte.Title
    FROM cte
    JOIN  HumanResources.Employee AS e
        ON cte.ManagerID = e.EmployeeID
)
-- Notice the MAXRECURSION option is removed
SELECT EmployeeID, ManagerID, Title
FROM cte
GO

然后在查询视图时包含MAXRECURSION选项:

USE AdventureWorks;
GO
SELECT  EmployeeID, ManagerID, Title
FROM    vwCTE
OPTION (MAXRECURSION 2);

另请参阅AaskashM的答案,网址为/sf/answers/520023241/