Selecting a Data Transfer Method 
Selecting a Data Transfer Method
When you transfer data in ABAP, you have three options to submit the data for the data transfer. Only the first two methods can be recommended without reservation. The third method, by way of CALL DIALOG, is outmoded. CALL DIALOG is less comfortable than the other methods. You should use it only if you must.
Summary: With
Your program prepares the data and then calls the corresponding transaction that is then processed immediately.
The most important features of
CALL TRANSACTION USING are:The program specifies the update type
The system executes a database commit immediately before and after the
Summary: Offers management of sessions, support for playing back and correcting sessions that contain errors, and detailed logging.
Your program prepares the data and stores it in a batch input session. A session is a collection of transaction data for one or more transactions. Batch input sessions are maintained by the system in the batch input queue. You can process batch input sessions in the background processing system.
Your program must open a session in the queue before transferring data to it, and must close it again afterwards. All of these operations are performed by making function module calls from the ABAP program.
The most important aspects of the session interface are:
During processing, no transaction is started until the previous transaction has been written to the database.
The batch input program must not open a session until it has closed the preceding session.
Summary: Not recommended if you can enter data by way of sessions or CALL TRANSACTION USING.
Your program prepares data for a sequence of dialog screens, and calls a dialog module for immediate processing.
The most important aspects of the CALL DIALOG interface are:
A database update occurs only when the calling program executes a commit operation.