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
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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 ...
Aspect DDIC View (ABAP Dictionary View) CDS View (Core Data Services View) Definition Tool Created using SE11 (Graphical interface) Created using ADT (Eclipse) with SQL-like DDL syntax Technology Base Classic SAP NetWeaver Modern SAP HANA / S/4HANA Definition Style GUI-based definition (drag-and-drop style) Text-based, code-centric with annotations Join Support Basic joins (Inner, Outer) Advanced ...
1. Open SQL ABAP’s database-independent SQL. Works on all supported DBs (HANA, Oracle, MSSQL, DB2, …). ABAP converts Open SQL statements into the database-specific SQL automatically. Ensures portability → same ABAP program runs regardless of underlying DB. Supports buffering (e.g., table buffers in SAP). Only a ...
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, ...
Identify the Type of CDS View You Want to Extend There are different layers in RAP: Interface View (I_) Consumption/Projection View (C_ or ZC_) Data Definition View (Z_) Usually, you extend interface or projection views. Use the EXTEND VIEW Statement You can extend a CDS view using ...
DCL (Data Control Language) in CDS is used to define and control data authorizations for CDS views.In other words, it allows you to restrict access to specific data records based on user roles, so that users can only see ...