How To Update the Position Effective Start Date in HCM?

Summary:

We have HCM integration with our legacy payroll system (Chris21). Position data was loaded via Oracle HDL format at implementation time.  The position effective start date is not a field within the file and is updated by the process within Oracle.   The defaulting date was entered as 01/01/1995.  This is a date prior to any effective dated record created in our host payroll system (Chris21).  Due to the nature of the hierarchical relationship of the position file, when an incumbent is associated to the position the effective start date and end date get updated.  This effective start date was updated