RAP is structured in 3 layers: 1. Data Modeling & Definition Layer Component Purpose CDS Data Model Defines entities and relationships (tables, views) CDS View Entities Provides the foundation for business objects Associations Represent relationships between entities Annotations Define metadata (UI, OData, behavior, etc.) 2. Business Service Provisioning Layer Component Purpose Behavior Definition (.behavior) Defines ...
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Feature OLTP OLAP Full Form Online Transaction Processing Online Analytical Processing Purpose Run daily operations Analyze and report on business data Operation Type Short, frequent transactions Complex queries, aggregations Data Volume Large number of small transactions Smaller number of large queries Performance Focus Speed of write operations Speed of read/analysis Data Structure Highly normalized Often denormalized (e.g., star schema) Examples Insert/update orders, ...
Feature Row Store Column Store Data Layout Row by row Column by column Best Use Case OLTP (transactions) OLAP (analytics, reporting) Read Performance Good for full row reads Excellent for column-specific reads Write Performance Fast for row-level writes Slower for frequent updates/inserts Compression Lower Higher Aggregations & Filters Slower Much faster
Exposed Associations An exposed association is one that is defined in a CDS view and is made available (exposed) to consumers of the view — such as other CDS views, analytical queries, or OData services. You define the association using the ...
Association An association is a declarative relationship between CDS entities (like foreign keys), defined using the association keyword. Key Characteristics: Lazy/Evaluated-on-demand: Data from the association is not fetched unless it is explicitly accessed using a path expression (like to_customer.name). Navigation-style ...
AMDP (ABAP Managed Database Procedures) in CDS (Core Data Services) in SAP refers to a way to integrate native SQLScript (e.g., HANA procedures) directly within ABAP classes. It’s not a part of CDS views themselves, but is often used alongside ...
A CDS view (Core Data Services view) is a virtual data model used in the SAP HANA database and ABAP environment to define semantic layers on top of database tables. It allows for modular, reusable, and optimized data access, especially ...