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Understanding Persistence Service

persistent class Special class whose attributes are associated with database tables using object-relational mapping. Can be created using Mapping Assistant in Class Builder. The objects of persistent classes are managed by object services . persistent class


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Persistence Classes: In Class Builder, there is an option to create a "Persistent Class" and once created, the system automatically creates a Class Actor or Class Agent which has the following inheritance relationships. The moment you create a Persistent Class, workbench also generates two additional classes: ZCB_PERSIST_SFLIGHT as the Base Class


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Today we will see how to use the Persistent Object services in the test application. You can find all these under ABAP Objects. Get the Agent Object by accessing the public attribute AGENT in the agent class. For Read access, get the persistent object by using the GET_PERSISTENT method of the agent object. To create entry using the persistent.


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CL_persistent The class CL_persistent is a class created as a persistent class using Class Builder. The objects of this class are managed by the persistence service. These objects are known as managed objects (note that a managed object does not necessarily have to be a persistent object).


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Persistent Classes To use the Persistence Service for objects, the classes of these objects must have been created as persistent classes in Class Builder. The term persistent class does not imply that a class is persistent (every class is persistent as a template for objects).


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No, at the moment this is not possible, and as far as I know, it has not been decided whether it will be implemented at all. You neither can make changes on them through eclipse, that will show you the following warning: Persistent classes are currently not supported by this editor. Share. Improve this answer. Follow. edited Sep 22, 2015 at 12:37.


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The Persistence Service lets the ABAP programmer work with relational database data in an object-oriented way. So we're talking here about an [ORM| http://en.wikipedia.org/wiki/Object-relational_mapping] framework.


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Creating a Persistent Class (SAP Library - ABAP Workbench Tools) Relevancy Factor: 20.0. You need to use the prefix CL_ (or a corresponding naming convention in the customer namespace) for Persistent Class es. The auxiliary classes use the same convention.


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The agent class manages the persistent objects at runtime. The medhods of the agent class can be mostly redefined. Besides of them, the agent class can be extended with new attributes, methodes etc. More details to the Object Services under ABAP - Object Services Standard BAPIs


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Step 1 Create ABAP package Open ABAP Development Tools (ADT) and select your ABAP Cloud Project you created in Create an SAP BTP ABAP Environment Trial User. Right-click on ZLOCAL and select New > ABAP Package. Create a new ABAP package: Name: ZTRAVEL_APP_XXX Description: Package for travel XXX Superpackage: ZLOCAL Check Add to favorite packages.


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This simple class now let me easily generate simple classes for selection. 1) Generate persistent class. 2) Define local variable for query. 3) Call query with agent and query structure. The provided class is just a prototype. If you wish - you can copy it and try to use it.


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Once the database table is defined, a persistence class must be defined. In order to define persistent classes, follow these steps: Call transaction SE24. Enter a suitable name of the persistent class to be created. We will create a class by entering the name ZCL_MY_PERSIST. Enter the name in the Class field and click on the Create button.


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Figure 1 Creating the Persistent Class Persistent classes are like normal classes and are created using the class builder (se24). The only difference while creating a persistent class is the tick mark Persistent Class, which identifies the class as a persistent class.


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1 Here is a dynamic solution, query_data is the result returned from the call to get_persistent_by_query ( ). In the end the data will be stored in structured table

, you can use this to display in your ALV. Note that there is little control over the order of the field.


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The Persistence Service is a software layer that manages persistent objects. This software layer consists of a general part and a class-specific part. It is made up of global classes and interfaces from the Class Library. The class-specific part is specially generated for each persistent class.


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Procedure In the Repository Browser (transaction SE80), navigate to the package in which you want to create a persistent class. In the context menu of the package, choose Create → Class Library → Class. The Create Class dialog box appears. In the Class Type group box, choose Persistent Class.