Lock mechanism allows simultaneous accessing of same data records by two or more users at the same time. Functional Modules are responsible for set and release the locks. Function modules are automatically generated from the lock objects definition in the ABAP/4 Dictionary.
When these functional modules are called, the retrieved table rows get locked or unlocked with the definition of certain values to the fields.

SE11 transaction used to create lock objects.

Lock mechanism allows simultaneous accessing of same data records by two or more users at the same time. Functional Modules are responsible for set and release the locks. Function modules are automatically generated from the lock objects definition in the ABAP/4 Dictionary.
When these functional modules are called, the retrieved table rows get locked or unlocked with the definition of certain values to the fields.

Lock objects are used to avoid the inconsistency while accessing the data during its insertion or updation in the database. Tables data records that are required to be locked during its insertion or updation must be defined in a Lock Object with their key fields.

Lock mechanism satisfies below two main functions -

• A program can communicate to the other programs with the data records that are just reading or changing.
• A program can prevent itself from reading data that is just being changed by another program.

Lock objects are used to synchronize the access of several users using same data by more than one program. Lock objects are used to avoid the inconsistency when data is inserted or changed in the database. Tables data records that are locked should be defined in a Lock Object along with their key fields.

The function of the Lock Object is to prevent inconsistencies or incorrect information to occur when different types of data inserted in the database.

Lock objects main function is to synchronize the access of several users using same data by more than one program. Lock objects are used to avoid the inconsistency when data is inserted or changed in the database.