What is optimistic lock in SAP BC-CST-EQ - Enqueue?

SAP Term: optimistic lock

• Component: BC-CST-EQ

• Component Name: Enqueue

• Description: Lock with which multiple ABAP users or ABAP sessions are assigned read access to the same data. ABAP users or ABAP sessions can request the lock multiple times since it is cumulated. If the data is to be changed, the optimistic lock must be converted into an exclusive lock E lock. This invalidates optimistic locks of other users to the same data.

Smart SAP Assistant

• Key Concepts: 
  Optimistic lock is a feature of the BC-CST-EQ Enqueue component of SAP. It is used to ensure that only one user can modify a particular record at a time. It works by assigning a unique identifier to each record, and when a user attempts to modify the record, the system checks to see if the identifier has changed since the user began their work. If it has, then the user is prevented from making changes and must wait until the other user has finished their work. 
  
  How to use it: 
  Optimistic lock can be enabled in the BC-CST-EQ Enqueue component of SAP. To do this, go to the “Settings” tab and select “Enable Optimistic Lock”. This will ensure that only one user can modify a particular record at a time. 
  
  Tips & Tricks: 
  When using optimistic lock, it is important to remember that it only works when multiple users are attempting to modify the same record at the same time. If only one user is modifying a record, then there is no need for optimistic lock. 
  
  Related Information: 
  Optimistic lock is similar to pessimistic lock, which also prevents multiple users from modifying the same record at the same time. However, pessimistic lock works by locking the entire record while optimistic lock only locks individual fields within the record.