ABAP

Step into ABAP with this beginner's guide. First understand ABAP syntax and find out how to add data and logic to your applications. Then delve into backend programming: learn to work with the ABAP data dictionary, create database objects, and process and store data. Round out your skill set by practicing error handling, modularization, string manipulation, and more. With guided examples, step-by-step instructions, and detailed code you'll become an ABAP developer in no time!a. ABAP Language BasicsLearn the ABAP language, from formatting code to using variables and constants. Understand how to add binary logic to applications, create simple user interfaces, and more.b. Working with DataCreate data dictionary objects and program ABAP applications to process and read data from a database. Use working memory to store retrieved data and display it to users.c. Manipulating ProgramsModularize ABAP programs, handle errors, and work with strings, texts, dates, times, and currencies.d. Preparing for an ABAP CareerUnderstand the SAP system landscape, prepare your development environment, and explore the official ABAP development guidelines. Highlights: Procedural programming Object-oriented programming Flow control Arithmetic operations Data dictionary Defining variables and constants Creating tables Database read/write Modularization Debugging SAP List Viewer (ALV)

Make programs modular, troubleshoot errors, and more

Auteur
Brian O'Neill is an ABAP developer with experience working across different SAP ERP modules and custom applications. He has worked in a variety of IT positions, from business analyst to ABAP developer. He is currently writing applications that can connect to an SAP backend using SAP Gateway. He holds a bachelor's degree in Computer Information Systems from California State University.

Texte du rabat

Step into ABAP with this beginner's guide. First understand ABAP syntax and find out how to add data and logic to your applications. Then delve into backend programming: learn to work with the ABAP data dictionary, create database objects, and process and store data. Round out your skill set by practicing error handling, modularization, string manipulation, and more. With guided examples, step-by-step instructions, and detailed code you'll become an ABAP developer in no time!

a. ABAP Language Basics
Learn the ABAP language, from formatting code to using variables and constants. Understand how to add binary logic to applications, create simple user interfaces, and more.

b. Working with Data
Create data dictionary objects and program ABAP applications to process and read data from a database. Use working memory to store retrieved data and display it to users.

c. Manipulating Programs
Modularize ABAP programs, handle errors, and work with strings, texts, dates, times, and currencies.

d. Preparing for an ABAP Career
Understand the SAP system landscape, prepare your development environment, and explore the official ABAP development guidelines.

Highlights:

• Procedural programming
• Object-oriented programming
• Flow control
• Arithmetic operations
• Data dictionary
• Defining variables and constants
• Creating tables
• Database read/write
• Modularization
• Debugging

• SAP List Viewer (ALV)

Résumé
Step into ABAP with this guide. First understand ABAP syntax and find out how to add data and logic to your applications. Then learn to work with the ABAP data dictionary, create database objects, and process and store data. Round out your skill set by practicing error handling, modularization, string manipulation, and more.

Contenu
... Preface ... 17

... Audience ... 17

... Your ABAP Learning Path ... 18

1 ... Introduction to SAP's ERP Systems ... 23

1.1 ... What Are SAP and ABAP? ... 23

1.2 ... Current State of SAP's ERP Systems ... 24

1.3 ... Old versus New ABAP ... 26

1.4 ... Navigating SAP ERP Systems ... 28

1.5 ... Summary ... 34

2 ... Creating Your First Program ... 35

2.1 ... Hello, World! ... 35

2.2 ... Summary ... 49

3 ... ABAP 101 ... 51

3.1 ... Variables and Constants in ABAP ... 51

3.2 ... Arithmetic and Basic Math Functions ... 65

3.3 ... Flow Control ... 72

3.4 ... Selection Screen Programming ... 80

3.5 ... Event Blocks ... 92

3.6 ... Formatting Code ... 95

3.7 ... Comments ... 97

3.8 ... Debugging Basics ... 100

3.9 ... Tying It All Together ... 117

3.10 ... Summary ... 120

4 ... Data Dictionary Objects ... 121

4.1 ... What Is a Database? ... 121

4.2 ... What Is a Data Dictionary? ... 122

4.3 ... Database Design ... 123

4.4 ... Navigation to ABAP Dictionary Objects ... 127

4.5 ... Table, Data Element, and Domain ... 129

4.6 ... Training Data Model and Example Definition ... 132

4.7 ... Creating a New Domain ... 135

4.8 ... Creating a New Data Element ... 139

4.9 ... Creating and Editing Tables ... 144

4.10 ... Documentation ... 161

4.11 ... Viewing Data in the Database Tables ... 162

4.12 ... Table Maintenance Dialogs ... 170

4.13 ... Structures and Table Types ... 174

4.14 ... Search Help ... 177

4.15 ... Views ... 181

4.16 ... Summary ... 184

5 ... Accessing the Database ... 185

5.1 ... SQL Console in Eclipse ... 186

5.2 ... Reading Data ... 187

5.3 ... Changing Data ... 210

5.4 ... Table Locks ... 214

5.5 ... Performance Topics ... 224

5.6 ... Obsolete Database Access Keywords ... 226

5.7 ... Summary ... 227

6 ... Storing Data in Working Memory ... 229

6.1 ... Using ABAP Dictionary Data Types ... 229

6.2 ... Creating Data Types with the TYPE Keyword ... 231

6.3 ... Field Symbols ... 233

6.4 ... Defining Internal Tables ... 234

6.5 ... Reading Data from Internal Tables ... 241

6.6 ... Modifying Internal Tables ... 250

6.7 ... Other Internal Table Operations ... 257

6.8 ... Which Table Should Be Used? ... 261

6.9 ... Updating ABAP Dictionary Table Type ... 263

6.10 ... Obsolete Working Memory Syntax ... 265

6.11 ... Summary ... 268

7 ... Making Programs Modular ... 269

7.1 ... Separation of Concerns ... 269

7.2 ... Subroutines ... 272

7.3 ... Introduction to Object-Oriented Programming ... 274

7.4 ... Structuring Classes ... 277

7.5 ... Global Classes ... 308

7.6 ... Design Patterns ... 317

7.7 ... Function Modules ... 317

7.8 ... Summary ... 327

8 ... Error Handling ... 329

8.1 ... SY-SUBRC ... 329

8.2 ... Message Classes ... 331

8.3 ... Exception Classes ... 341

8.4 ... Non-Class-Based Exceptions ... 355

8.5 ... Summary ... 358

9 ... Presenting Data Using the ABAP List Viewer ... 361

9.1 ... What Is ALV? ... 361

9.2 ... Report Example Using an SALV Table ... 366

9.3 ... Report Example Using SALV Tree ... 371

9.4 ... ALV with Integrated Data Access ... 380

9.5 ... Outdated ALV Frameworks ... 383

9.6 ... Summary ... 386

10 ... Creating a Shopping Cart Example ... 387

10.1 ... The Design ... 388

10.2 ... Database Solution ... 392

10.3 ... Accessing the Database Solution ... 405

10.4 ... Creating a Message Class for the Solution ... 415

10.5 ... Creating Classic Screens for the Solution ... 416

10.6 ... Summary ... 429

11 ... Working with Strings and Texts ... 431

11.1 ... String Manipulation ... 431

11.2 ... Text Symbols ... 437

11.3 ... Translating Data in Tables ... 445

11.4 ... Translating Me…