Persistent Enterprise Software and Services Reviews

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. There are no persistent objects in ABAP Objects. However, the Persistence Service within Object Services allows application developers to work with persistent objects.

Persistent Enterprise Software and Services Reviews

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 ABAP Persistent Classes: Coding without SQL 68 15 21,738 Introduction This weblog was really sparked by a conversation that I had the other day. I was talking with a Java developer who was fairly new to the SAP world, but claimed to already be an ABAP expert. He was commenting on the ABAP programming language. 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 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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To create a persistent class from the initial screen of the Object Navigator (SE80): Select the category Class/Interface in from the object list. Enter the name of the new class according to the naming conventions . Confirm your entries with ENTER . Confirm that you want to create the class. The system displays the Create Class. dialog box. 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). 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). Persistent classes can have subclasses. These subclasses are also persistent classes, in that they inherit the persistence mapping of the superclass to the database table or tables. The persistence mapping of the superclass is defined in the subclass. If not, the general polymorphic principle of inheritance, in which the consumer handles.

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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. 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. 1. So why cant we just use the the same ourselves. What is the advantage of creating a persistent object and then using get/set methods? IMO, this only makes things complex. 2. Lets say I want to retrieve multiple records into an internal table: Below is an example from Former Member: 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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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. Basis Components ABAP Runtime Environment Persistent Class Source: Official SAP Glossary Persistent Class Definition Special class whose attributes are linked to database tables using object relational mapping. Can be created using the Mapping Assistant of the Class Builder. The objects of persistent classes are managed using object services.