CREATE FUNCTION [dbo].[ufnGetPurchaseOrderStatusText](@Status [tinyint])
RETURNS [nvarchar](15)
AS
-- Returns the sales order status text representation for the status value.
BEGIN
   DECLARE @ret [nvarchar](15);

   SET @ret =
       CASE @Status
           WHEN 1 THEN 'Pending'
           WHEN 2 THEN 'Approved'
           WHEN 3 THEN 'Rejected'
           WHEN 4 THEN 'Complete'
           ELSE '** Invalid **'
       END;
   
   RETURN @ret
END;
GO
EXEC sp_addextendedproperty N'MS_Description', N'Scalar function returning the text representation of the Status column in the PurchaseOrderHeader table.', 'SCHEMA', N'dbo', 'FUNCTION', N'ufnGetPurchaseOrderStatusText', NULL, NULL
GO
EXEC sp_addextendedproperty N'MS_Description', N'Input parameter for the scalar function ufnGetPurchaseOrdertStatusText. Enter a valid integer.', 'SCHEMA', N'dbo', 'FUNCTION', N'ufnGetPurchaseOrderStatusText', 'PARAMETER', N'@Status'
GO