When the Integration Service pushes transformation logic to the database, it cannot trace all the events that occur inside the database server. The statistics the Integration Service can trace depend on the type of pushdown optimization. When you push transformation logic to the database, the Integration Service generates a session log with the following differences:
The session log does not contain details for transformations processed by the database.
The session log does not contain the thread busy percentage when the session is configured for full pushdown optimization.
The session log does not contain the number of rows read from the source when the Integration Service uses full pushdown optimization and pushes all transformation logic to the database.
The session log contains the number of rows read from optimized sources when the Integration Service uses source-side pushdown optimization.