Call AddRow() after all ProcessInputRow() are called in a Script Component

Hi Guys,

I am new to SSIS. Heree is the transformation I need to do. In database one, I have tables:

A

B

C

Where B is a detailed table of A, and C is a "derived" table of B. There is a one to one relationship between B and C, but there may be more than one record in B for each record in A.

In database two, we have the table structure:

AA

CC

And there is a one to one relationship between AA and CC. And I need to design a transformation to migrate data from database one to database two.

Table A(->AA) and B(->BB) will be easy, just one to one migration.

The mapping rule for table C(->CC) they decided was: I need to concate each record in B and C and for a record in CC. For example, suppose we have:

A1

B1(C1)

B2(C2)

A2

B3(C3)

B4(C4)

B5(C5)

Then we will have the following records in database two:

A_1

(B1+C1+B2+C2)

A2

(B3+C3 + B4+C4 + B5+C5)

I looked through all the stock data flow components, and it seems to me that none of them can perform this task, so I am thinking to design a Script transform component to do the task.

I have written the script:

in each ProcessInputRow() sub, I check record's foreign key to A, and if they are the same I concate the records, then I put them into a VB.NET collection. Once all the records are processed, in the PostExecute() function, I count the number of new rows, (in the above example 2), then I call AddRow to add the rows, by:

OutputBuffer.AddRow()

But this does not work, I got "Object reference not set to an instance of an object". It seems that in PostExecute, the OutputBuffer is not longer valid?

Help please! :)

Is there a better way of doing what I am trying to do?

Thanks!

Wenbiao

Wenbiao wrote:

But this does not work, I got "Object reference not set to an instance of an object". It seems that in PostExecute, the OutputBuffer is not longer valid?

That's right, the output buffer is no longer valid in PostExecute().

It IS available in CreateNewOutputRows() so you can create your output rows in there.

-Jamie