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Type of value error in ssis package

Posted on 2014-01-14
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Last Modified: 2016-02-10
I have an ssis execute sql task step

It calls a stored procedure and attempts to dump the output into a user variable of type double.

It is getting a error thrown about not being able to change types mid execution if the result of the stored procedure is zero (I think).

The best way I could troubleshoot this is manually run the stored procedure.  I hard coded the store procedure to act as follows:

declare @array as table(statement float)
	-- SET NOCOUNT ON added to prevent extra result sets from
	-- interfering with SELECT statements.
	SET NOCOUNT ON;

	IF @StatementDocNo = 0
		BEGIN
			SELECT 0 AS [Amount Due]
		END
	ELSE
		BEGIN
			-- Insert statements for procedure here
insert into @array
			SELECT DISTINCT -- select top 10 * from umcr2100
				isnull(util..UMCR2102.umAmount1,0)  AS [Discounted Amount Due]
			FROM
				util..UMCR2100
				INNER JOIN util..UMCR2102 ON util..UMCR2100.umStatementDocNo = util..UMCR2102.umStatementDocNo
			WHERE
				(util..UMCR2100.umStatementDocNo = @StatementDocNo)
				AND
				umDescription1 LIKE 'Total Amount Due%'
		
		IF @@ROWCOUNT = 0
		BEGIN
			SELECT 0 AS [Amount Due]
		END
		ELSE
		BEGIN
		 select * from @array
		END
END

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I do not see how it is possible for the code above to throw anything not compatible with a double.  

How can I troubleshoot this/ make this work.

(The output almost always comes out to greater than zero and has a decimal).

This is written in sqlsvr 2008
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Question by:UnderSeven
2 Comments
 
LVL 65

Accepted Solution

by:
Jim Horn earned 500 total points
ID: 39779790
>SELECT 0 AS [Amount Due]
>SELECT DISTINCT ... AS [Discounted Amount Due]
>SELECT 0 AS [Amount Due]
>select * from @array

For starters, SSIS likes to create a 'contract' between it and a source of data so that it knows what schema to expect, so it can to map columns.  In your case, this means the SQL Task can't handle calling a SP where the return set is not the same schema each and every time.

You'll need to change the above four SELECTs so that it is the same exact schema.
Even better would be to only have one SELECT.
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Author Closing Comment

by:UnderSeven
ID: 39779840
That was it, once I normalized the output to all come from the same (explicit type) place it worked.
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