Mastering ABAP

A Complete Journey from ABAP Beginner to S/4HANA Professional

Introduction

1. Why This Book Exists
2. What You Will Learn
3. How This Book Is Structured
4. Prerequisites
5. A Note on Modern vs Legacy ABAP

Chapter 1: The ABAP Landscape and SAP Ecosystem

1. What Is ABAP and Why It Exists
2. The SAP Technology Stack: From Kernel to Fiori
3. ABAP Environments: Eclipse ADT, SAP GUI, and the Cloud
4. Your First Look at an ABAP Program
5. How Enterprise Development Actually Works

Chapter 2: ABAP Fundamentals — Syntax, Types, and Variables

1. Statements, Keywords, and Statement Blocks
2. Elementary Data Types and Declarations
3. Constants, Literals, and Type Modifiers
4. Operators: Arithmetic, Logical, Comparison, String
5. Working with Structures and Field Symbols

Chapter 3: Control Flow and Logic

1. Conditional Logic with IF, CASE, and COND
2. Loops: DO, WHILE, FOR, and LOOP AT
3. The NEW FOR Expression for Inline Table Building
4. Nested Control Structures and Readability
5. Common Logic Patterns in Enterprise Code

Chapter 4: Internal Tables — The Heart of ABAP Data Processing

1. Understanding Internal Table Types: Standard, Sorted, Hashed
2. Declaring and Populating Internal Tables
3. Reading, Modifying, and Deleting Table Entries
4. Looping Over Tables with Modern Syntax
5. Table Operations: JOIN, REDUCE, CORRESPONDING, VALUE
6. Performance Implications of Table Type Choices

Chapter 5: Modularization — Procedures, Functions, and Includes

1. Form Routines and Include Programs (Legacy)
2. Subroutines vs Methods: When to Use What
3. Function Modules: Definition, Grouping, and Calling
4. Global Classes as the Modern Standard
5. Code Organization in Real Projects

Chapter 6: Object-Oriented ABAP — Classes and Objects

1. Classes, Objects, and the Class Builder
2. Attributes, Methods, and Visibility Controls
3. Constructors, Destructors, and Initialization
4. Inheritance and Polymorphism in ABAP
5. Interfaces, Abstract Classes, and Multiple Implementation
6. Static vs Instance: Design Decisions

Chapter 7: Exception Handling and Robust Code

1. The ABAP Exception Hierarchy
2. System Exceptions and SY-SUBRC Patterns
3. Class-Based Exceptions: RAISING and CATCHING
4. Functional Methods and Returning Exceptions
5. Resumable Exceptions and Error Recovery
6. Defensive Programming Patterns

Chapter 8: Database Access with Open SQL

1. The ABAP Dictionary: Tables, Views, and Data Elements
2. SELECT Statements: From Basics to Complex Queries
3. INSERT, UPDATE, DELETE, and MODIFY Operations
4. JOINs, Subqueries, and Aggregations in Open SQL
5. FOR ALL ENTRIES Patterns and Pitfalls
6. Native SQL: When It Is Justified

Chapter 9: CDS Views — Declarative Data Modeling for HANA

1. What Are CDS Views and Why They Matter
2. Basic CDS View Syntax and Annotations
3. Associations, Joins, and Calculated Fields
4. ABAP Managed Database Procedures (AMDP)
5. CDS in the Application Stack: From Data to UI
6. Performance Benefits of Push-Down Processing

Chapter 10: The RESTful Application Programming Model (RAP)

1. Understanding the RAP Architecture
2. Behavioral Definitions and Determinations
3. CRUD Operations in RAP: Create, Read, Update, Delete
4. Validation, Authorization, and Draft Handling
5. Service Bindings and OData Exposure
6. Building a Complete RAP Application End to End

Chapter 11: Integration — APIs, BAPIs, RFCs, and OData

1. Remote Function Calls (RFC): Synchronous and Asynchronous
2. Business Application Programming Interfaces (BAPI)
3. OData Services: Gateway Framework and Modern Alternatives
4. HTTP Client Communication from ABAP
5. JSON, XML, and Data Serialization

Chapter 12: Enhancements — User Exits, BADIs, and Modification Techniques

1. The Enhancement Philosophy: Why Not Modify Standard Code
2. Customer Exits and Screens
3. Business Add-Ins (BADIs): Classic and Enhanced
4. Implicit and Explicit Enhancements
5. BAdI Implementation in OO ABAP
6. Choosing the Right Enhancement Strategy

Chapter 13: User Interfaces — ALV, Reports, and Forms

1. Classic List Processing and Write Statements
2. ALV Grid Reports: Object-Oriented Approach
3. Selection Screens and Parameter Handling
4. Smartforms and Adobe Interactive Forms
5. Modern Alternatives: Fiori Elements and RAP UIs

Chapter 14: Operations — Background Jobs, Transports, and Testing

1. Background Jobs and Batch Processing
2. The Transport Management System (TMS)
3. Unit Testing with ABAP Unit
4. Integration Testing Strategies
5. Code Inspection and ATC Checks

Chapter 15: Debugging, Performance, and Security

1. The ABAP Debugger: Breakpoints, Watches, and Navigation
2. Performance Analysis: SAT, ST05, and SQL Traces
3. Common Performance Anti-Patterns and Fixes
4. Authorization Objects and Role Design
5. Secure Coding Practices in ABAP
6. Memory Management and Large Data Sets

Chapter 16: Modern ABAP, Clean Code, and Professional Practices

1. The Evolution of ABAP Syntax: From Legacy to Modern
2. Clean ABAP Principles and Guidelines
3. Design Patterns in ABAP: Factory, Strategy, Observer, Repository
4. Code Reviews and Team Standards
5. ABAP in the Cloud: BTP and Steampunk
6. Career Pathways and Continuous Learning

Conclusion

References