Following are the two main functions accomplished with the lock mechanism :
* A program can communicate with other programs about data records that it is just reading or changing.
* A program can prevent itself from reading data that has just been changed by another program.
* A lock request is first generated by the program. Then this request goes to the Enqueue server and the lock is created in the lock table. The Enqueue server sets the lock and the program is finally ready to access data.
* Go to transaction SE11 to create lock objects.
