You can include the following types of ports in a Salesforce Lookup transformation:
Lookup ports.
You import the lookup ports from a Salesforce object definition when you create a Salesforce Lookup transformation. The PowerCenter Integration Service uses lookup ports to generate the lookup query.
Pass-through ports.
You can add pass-through ports to the transformation. The PowerCenter Integration Service passes these port values unchanged through the transformation.
Default ports.
When you import a Salesforce object definition, the Designer creates default ports named LKP_FILTER and LKP_MATCHIDX. You can use the LKP_FILTER port to add a filter condition to the lookup query. The PowerCenter Integration Service uses the LKP_MATCHIDX port to assign sequence IDs to matched rows.