Persistence Class is one of the four classes in Object Oriented Programming in ABAP.
The purpose of persistence class is to perform database operations like insert, update, delete.
The persistence class name must start with CL.
While creating the persistence class, 2 helper class creates automatically. Those helper classes are CA and CB.
CA is called as actor class or agent class.
CB is called base class.

Creating Persistence Classes :-

Step 1 :- Go to SE24 and give a suitable name to the class.
Step 2 :- Click on create button.
Step 3 :- Click on save and Provide Package and transaction requests
Step 4 :- We will get automatic one interface and one friend class as we can see below.

Requirement :-
- How to create getter and setter method for a particular table using Persistence Class.
Solution :-
Step 1 :- Click on go to. → Persistence Representation
- It will ask for table name.
Step 2 :- Provide the table name.
- Press enter.
Step 3 :- Click on the above field name one by one and click upper arrow button.
Step 4 :- Click on save. and as soon as you will go back you will see many methods will have created automatically.
- SAP automatically generated getter and setter method for the fields of table.
- For primary field SAP will generate getter method only.
- and for non primary field it will generate both getter and setter methods.