Can SSIS check record that is imported during the current run

Question

I am importing multiple users. Each user can belong to multiple companies. So from Source I will get rows like these

userId  companyID  userinfo   companyinfo
12         


        

Answer 1

Brian's comment about Cache Mode is spot-on, but I would add that in my experience the best way to handle things like this in SSIS is to import all of the data into a staging table, and then handle the lookups and relationship-creation in a stored procedure on the SQL Server. These kinds of things go much faster in TSQL than they do in SSIS. SSIS is fastest when it's simplest.