ExecuteFromDB Issue

Hello,

I'm facing issue with ExecuteFromDB. The query returns the same data which is there in buffer. It is not reading the DB values.

Retrieve, Query.Execute(selectionparams) gets the same data (buffer) and Query.ExecuteFromDB(selectionparams) gets the data from DB and overwrites "this" node (buffer).

How can I retrieve the BO data from DB in extension BO without overwriting buffer value in "this" node?

For instance, I want to read ServiceRequest BO data in BeforeSave event to compare the field values.

Thanks.

Regards,

MB