Table-Valued Parameter in Stored Procedure and the Entity Framework 4.0

Question

I have a stored procedure in SQL Server 2008 called 'GetPrices' with a Table-Valued Parameter called 'StoreIDs'.

This is the type i created for this TVP:

CREATE TYPE integer_list_tbltype AS TABLE (n int)

I would like to call the SP from my Entity Framework. But when I try to add the Stored Procedure to the EDM, i get the following error:

The function 'GetPrices' has a parameter 'StoreIDs' at parameter index 2 that has a data type 'table type' which is not supported. The function was excluded.

Is there any workaround this? Any thoughts?

Fabio

Answer 1

I agree that passing in a CSV sting is the best solution in this case. I would like to propose simpler way to split csv string, without creating tables and functions, by using CTE:

declare @separator char(1);
set @separator = ',';

;with baseCte as
(select left(@ValueList, charindex(@separator, @ValueList) - 1) as Value,
substring(@ValueList, charindex(@separator, @ValueList) + 1, len(@ValueList)) 
as rest
union all
select left(rest, charindex(@separator, rest) - 1) as Value, 
substring(rest, charindex(@separator, rest) + 1, len(rest)) from baseCte
where len(rest) > 1
)
select Value from baseCte
OPTION (MAXRECURSION 0);