When the PowerCenter Integration Service runs a CDC session for a specific time period, it reads all records in the source object and extracts records that meet the CDC time period criteria.
The PowerCenter Integration Service completes the following steps to capture changed data for a time-period based CDC session:
Reads all records created between the CDC start time and end time, and passes them to the next transformation as rows flagged for insert.
Reads all records updated between the CDC start time and end time, and passes them to the next transformation as rows flagged for update.
Reads all records deleted between the CDC start time and end time, and passes them to the next transformation as rows flagged for delete.