SAP locks must be maintained for the duration of SAP LUWs. For this reason, various work processes and, if applicable, changing application servers must be able to handle these locks.
SAP locks are based on lock objects. The ABAP Dictionary defines these objects; they permit locks of single or several lines in one database table or locks of lines in several database tables linked by foreign key dependencies.
The creation of a lock object generates two lock function modules, whose names consist of the prefixes ENQUEUE_ and DEQUEUE_ and the name of the lock object.
See also SAP Locking Concept.
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