If you enable a dynamic lookup cache, the output port values vary based on how you configure the dynamic lookup cache. The output value of the lookup/output port depends on whether you choose to output old or new values when the Integration Service updates a row.
You can configure the
Output Old Value On Update
property to specify one of the following types of output values for a lookup/output port:
Output old values on update. The Integration Service outputs the value that existed in the cache before it updated the row.
Output new values on update. The Integration Service outputs the updated value that it writes in the cache. The lookup/output port value matches the output port value.