how to use ssis to pull and keep data in sync between SQL server 2008 and Postgres 8.3

I am trying to pull data from a PostgreSQL 8.3 database. I can successfully pull data from the tables and write them into my SQL server tables. My problem is that I don't want to just sync everything. I want to get the max(id) from my local SQL server table, then get everything > max(id) from the postgres remote table. I used a web article create an connection to my postgres db. However I can't find a place in the source where I can use a variable in my where clause.

What I am doing is: SELECT * FROM tblFiles in my editor. I would like to do something like SELECT * FROM tblFiles WHERE id > cast(? as int)

Can anybody help or does anybody have a better way of doing this? All I need to do is insert the rows that exist in the remote server to my local server.
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I am afraid, you can't do that..

The best way to do it is get all the data from Postgre Table , Use a lookup in the SQL table and compare the existing data using the Max(id) and Insert only the required data into the SQL table..

ADO.NET Source ---> Lookup (to get Max Id from SQL Table) ----> OLE DB source (Insert new data)

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sqlagent007Author Commented:
Thanks, I think I will create a small table on the postgres side, then update that table with my SQL tables maxID, and then put a sub query in the object to filter on ID > (select max(id) from NewPostresTable).
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Microsoft SQL Server 2008

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