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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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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:
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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.
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Persistent class ABAP Program stays in the local ABAP memory for the session only till the runtime of that program. This data lives only as long as its context - that is, as long as its associated procedure (for local procedure data); its object (for attributes of classes); or its program (for global program data).
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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.
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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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ABAP Object Services. In this blog you are going to read some information about ABAP Object Services and how to create persistent class object with single-table using mapping assistant tool, create object instance with class agent, consumer perspective and record converted into database table. #1. Creating Persistent Object with single-table.
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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.
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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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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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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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There are no persistent objects in ABAP Objects. However, the Persistence Service within Object Services allows application developers to work with persistent objects.
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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
