Is it possible to inspect the contents of a Table Value Parameter via the debugger?

Question

Does anyone know if it is possible to use the Visual Studio / SQL Server Management Studio debugger to inspect the contents of a Table Value Parameter passed to a stored procedure?

To give a trivial example:

CREATE TYPE [dbo].[ControllerId] AS TABLE(
    [id] [nvarchar](max) NOT NULL
)
GO

CREATE PROCEDURE [dbo].[test]
    @controllerData [dbo].[ControllerId] READONLY
AS
BEGIN
    SELECT COUNT(*) FROM @controllerData;
END

DECLARE @SampleData as [dbo].[ControllerId];
INSERT INTO @SampleData ([id]) VALUES ('test'), ('test2');

exec [dbo].[test] @SampleData;  

Using the above with a break point on the exec statement, I am able to step into the stored procedure without any trouble. The debugger shows that the @controllerData local has a value of '(table)' but I have not found any tool that would allow me to actual view the rows that make up that table.

Answer 1

Since you get no joy from the debugger, here is my suggestion. You add an input varaiable to determine if it is in test mode or not. Then if it is in testmode, run the select at the top of the sp to see what the data is.

CREATE TYPE [dbo].[ControllerId] AS TABLE( 
    [id] [nvarchar](max) NOT NULL 
) 
GO 

CREATE PROCEDURE [dbo].[jjtest] 
    (@controllerData [dbo].[ControllerId] READONLY 
    , @test bit = null)
AS 
IF @test = 1
BEGIN
SELECT * FROM  @controllerData
END
BEGIN 
    SELECT COUNT(*) FROM @controllerData; 
END 
GO

DECLARE @SampleData as [dbo].[ControllerId]; 
INSERT INTO @SampleData ([id]) VALUES ('test'), ('test2'); 

EXEC [dbo].[jjtest] @SampleData, 1;