How do i pass list as a input parameter to the TBV function?

Question

I have a TBV function and want to pass my function list type parameter like this

ALTER FUNCTION [dbo].[fn_Functiont]
(
 @listType (what  type i could use here ??)
)
RETURNS TABLE 
AS
RETURN 
(   
SELECT d.*, b.Name AS Name, ps.Name AS PaymentSystemName, c.UserName AS UserName, c.FirstName AS ClientFirstName, c.LastName AS LastName, c.Number AS DocumentNumber, c.Id
FROM Document AS d
JOIN System AS ps ON d.SystemId = ps.Id
JOIN Client AS c ON c.Id = d.ClientId
LEFT JOIN Shop AS b ON b.Id = d.ShopId
WHERE d.OperationTypeId IN (2, 4, 5) AND c.Type = 1
)

And i want to use this @listType in my function,particularly to check is that list contain any value or not and do something with that value.I am calling this function through Entity Framework 5.

Answer 1

In old days we used to pass comma separated string and split it into a table. Now SQL Server supports User-Defined table type, which can be used in your scenario.

To create a new User Defined table type

 CREATE TYPE CustomList AS TABLE 
 ( 
   ListItem VARCHAR(50)
 )
 GO

How to Declare

DECLARE @MyList CustomList

How to use

INSERT INTO @MyList
SELECT '1'
GO
INSERT INTO @MyList
SELECT '2'

In your case you can your list type as following.

ALTER FUNCTION [dbo].[fn_Functiont]
(
 @listType MYLIST
)
....
....

To know more about this visit MSDN

To know how to use table type in entity framework you can check here