Release 10.1A: OpenEdge Development:
ADM Reference

doBuildUpd

A procedure that transfers changed rows into the Update temp-table and returns it to the Commit function (the caller function).

Location: dataext.p

Parameters: None

Notes:

This code must be inside the SmartDataObject itself to allow the BUFFER-COPY operations. They can be specialized by defining like-named procedures in another support procedure.
For each existing row to be updated, there is already a before copy in the RowObjUpd table, so create an after row.
There is already a row in RowObjUpd for each Added/Copied row, so just update it with the latest values.
There is already a row in RowObjUpd for each Deleted row, so there is no need to do anything for these rows.