Release 10.1A: OpenEdge Data Management:
DataServer for Microsoft SQL Server

Transactions

With DataServer operations, an MSS data source handles its own transaction roll back and recovery operations. However, the Progress transaction scoping rules apply: a transaction ends when the code exits the outermost block that performs an update. With the DataServer:

The Progress 4GL sends a COMMIT to the data source, when a transaction that updates an MSS data source ends successfully.
The Progress 4GL sends a ROLLBACK to the data source if you interrupt the transaction.

See OpenEdge Development: Progress 4GL Handbook for details on how the Progress 4GL handles transactions and error conditions.