https://www.ibm.com/docs/en/db2/12.1.x?topic=methods-greaterthandb2datetime-db2dt1-db2datetime-db2dt2
DB2DateTime.GreaterThan(DB2DateTime db2DT1, DB2DateTime db2DT2) method
Determines whether one DB2DateTime instance value is later than another DB2DateTime instance value.
greaterthanmethod