Insert into temp table from exec call stored procedure

Question

I have a stored procedure where I insert a table into a temporary table and then I read that temp table row by row using a cursor:

USE [TEST_DB]
GO    
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

ALTER PROCEDURE [dbo].[returnValidationFailures] 

AS
BEGIN

    SET NOCOUNT ON;

    SELECT TOP 0 * INTO  TempTbl FROM   USER

    DECLARE cursor1 CURSOR FAST_FORWARD FOR
        SELECT *
        FROM   USER

    OPEN cursor1

    INSERT INTO TempTbl 
    EXEC ('fetch next from cursor1')

    WHILE @@FETCH_STATUS = 0
        INSERT INTO TempTbl 
        EXEC ('fetch next from cursor1')

    CLOSE cursor1

    DEALLOCATE cursor1

    SELECT *
    FROM   TempTbl 

    DROP TABLE TempTbl 

END

What I want here is to send the table name through a paramater like:

@TableNameParam varchar(10)

And then insert into temp table like:

SELECT TOP 0 * INTO  TempTbl FROM  @TableNameParam
DECLARE cursor1 CURSOR FAST_FORWARD FOR
        SELECT *
        FROM   @TableNameParam

This doesn't work (obviously). But every other method I tried didn't work. Is there any way I can set the data of an EXEC call like:

EXEC ('SELECT * FROM ' + @TableNameParam
    ' WHERE STATUS=1')

into the temp table?

Note: I DO NOT know the table structure.

Answer 1

I'm not very sure I understand what is your final scope, but my advise is to use a set-based approach.

To respond directly to you question, you should take into account the usage of temporary tables (#TempTable) instead of table variables (@TempTable).

EXEC ('SELECT * FROM ' + #TableNameParam + ' WHERE STATUS=1')

How is your data obtained in your temporary table?