Sequence number generation in EO

 To generate Primary key sequence generation in EO , Best practice is generate Data Manipulation Methods and in that we have to check condition if DML_INSERT?

 If we call createInsert in Updataable VO and while commit time it will call doDML() method,

 While insertion time if you want Primary key generation then we need to keep condition
if(operration==this.DML_INSERT)
and we have to set sequence number to primary key column (EmployeeId).