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Core Data Services for ABAP

Core Data Services for ABAP

          
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About the Book

If you're developing ABAP applications, you need CDS expertise. This book is your all-in-one guide, updated for SAP S/4HANA 2023! Start by learning to create and edit CDS views. Walk through CDS syntax and see how to define associations and annotations. Further refine your model by implementing access controls, service bindings, and table functions. Understand the CDS-based virtual data model, and then follow step-by-step instructions to model analytical and transactional applications. From modeling to testing to troubleshooting, this is the only book you need!

In this book, you'll learn about:

a. Creating Data Models
Create data models using CDS! Learn the ins and outs of CDS view syntax, from key fields to joins to data types and beyond. Define associations to establish relationships, use annotations to enrich your logic, implement conditional logic to control access, and more.

b. Modeling Applications
See how CDS views support a new application architecture. Model analytical applications by defining analytical views and queries; then use CDS for transactional applications based on the ABAP RESTful application programming model.

c. Extending, Testing, and Troubleshooting
Put the finishing touches on your CDS data models. Extend and enhance CDS views and transactional models, develop automated tests using the test double framework, and troubleshoot common problems.

Highlights include:

1) Data modeling
2) Application modeling
3) Associations
4) Annotations
5) Access controls
6) Business services
7) SAP HANA functions
8) Virtual data model
9) Analytical and transactional applications
10) Hierarchies
11) Extensibility
12) Testing and troubleshooting




Table of Contents:
  • ... Preface ... 17
  • Structure of the Book ... 19
  • Acknowledgments ... 22
  • 1 ... Modeling Your First CDS Views ... 23
  • 1.1 ... Define the Data Model of the Application ... 24
  • 1.2 ... Implement the Data Model of the Application ... 26
  • 1.3 ... Summary ... 52
  • 2 ... Fundamentals of CDS Data Modeling ... 53
  • 2.1 ... Overview of CDS Models ... 54
  • 2.2 ... Overview of CDS View Syntax ... 58
  • 2.3 ... Key Fields ... 61
  • 2.4 ... Cast Operations ... 62
  • 2.5 ... Typed Literals ... 64
  • 2.6 ... Simple Types ... 66
  • 2.7 ... Case Statements ... 68
  • 2.8 ... Session Variables ... 69
  • 2.9 ... Client Handling ... 71
  • 2.10 ... Select Distinct Statements ... 72
  • 2.11 ... Union Views ... 73
  • 2.12 ... Intersect and Except Statements ... 79
  • 2.13 ... Joins ... 81
  • 2.14 ... SQL Aggregation Functions ... 87
  • 2.15 ... Projection Fields ... 89
  • 2.16 ... Parameters ... 91
  • 2.17 ... Reference Fields ... 96
  • 2.18 ... Conversion Functions for Currencies and Quantity Units ... 99
  • 2.19 ... Provider Contracts ... 102
  • 2.20 ... Entity Buffer Definitions ... 104
  • 2.21 ... Summary ... 106
  • 3 ... Associations ... 107
  • 3.1 ... Define Associations ... 108
  • 3.2 ... Expose Associations ... 111
  • 3.3 ... Model Compositional Relations ... 111
  • 3.4 ... Model M:N Relations ... 114
  • 3.5 ... Project Associations ... 117
  • 3.6 ... Use Associations in CDS Views ... 118
  • 3.7 ... Use Associations in ABAP Code ... 129
  • 3.8 ... Summary ... 129
  • 4 ... Annotations ... 131
  • 4.1 ... Annotation Definitions ... 132
  • 4.2 ... Effects of Annotations ... 143
  • 4.3 ... Propagation Logic for Annotations ... 145
  • 4.4 ... Metadata Extensions ... 155
  • 4.5 ... Active Annotations ... 158
  • 4.6 ... Summary ... 160
  • 5 ... Access Controls ... 161
  • 5.1 ... Fundamentals of Access Controls ... 162
  • 5.2 ... Mode of Action of Access Controls ... 166
  • 5.3 ... Implementation Patterns for Access Controls ... 171
  • 5.4 ... Test Access Controls ... 207
  • 5.5 ... Summary ... 210
  • 6 ... Business Services ... 211
  • 6.1 ... Projection Views ... 212
  • 6.2 ... Service Definitions ... 216
  • 6.3 ... Service Bindings ... 221
  • 6.4 ... Testing Business Services ... 230
  • 6.5 ... Summary ... 233
  • 7 ... Native SAP HANA Functions in CDS ... 235
  • 7.1 ... Implementation of a CDS Table Function ... 236
  • 7.2 ... Application Scenarios ... 244
  • 7.3 ... Improve Performance and Avoid Errors ... 245
  • 7.4 ... Summary ... 247
  • 8 ... Modeling Application Data ... 249
  • 8.1 ... Application Architecture in SAP S/4HANA ... 250
  • 8.2 ... Field Labels ... 253
  • 8.3 ... Field Semantics ... 257
  • 8.4 ... Foreign Key Relations ... 262
  • 8.5 ... Text Relations ... 267
  • 8.6 ... Composition Relations ... 270
  • 8.7 ... Time-Dependent Data ... 272
  • 8.8 ... Summary ... 274
  • 9 ... The Virtual Data Model of SAP S/4HANA ... 275
  • 9.1 ... Why a Virtual Data Model? ... 276
  • 9.2 ... SAP Object Types and Object Node Types ... 277
  • 9.3 ... Categories of CDS Entities in the Virtual Data Model ... 280
  • 9.4 ... Naming in the Virtual Data Model ... 285
  • 9.5 ... Basic Interface View for the Sales Order ... 288
  • 9.6 ... Tips for Finding Virtual Data Model Views ... 295
  • 9.7 ... Summary ... 301
  • 10 ... Modeling Analytical Applications ... 303
  • 10.1 ... Analytics in SAP S/4HANA ... 303
  • 10.2 ... Analytical Views ... 305
  • 10.3 ... Analytical Queries ... 325
  • 10.4 ... Analytical Infrastructure ... 356
  • 10.5 ... Summary ... 359
  • 11 ... Modeling Transactional Applications ... 361
  • 11.1 ... Transactional Applications ... 362
  • 11.2 ... Transactional Infrastructure in SAP S/4HANA ... 363
  • 11.3 ... Transactional Object Models ... 366
  • 11.4 ... Behavior Definitions ... 372
  • 11.5 ... Transactional Projection Object Models ... 467
  • 11.6 ... Define Interface Behavior Definition ... 477
  • 11.7 ... Define Projection Behavior Definition ... 484
  • 11.8 ... Runtime Orchestration ... 492
  • 11.9 ... SAP Fiori and OData Consumption ... 498
  • 11.10 ... SAP Event Mesh and Local Event Handlers ... 510
  • 11.11 ... Summary ... 513
  • 12 ... Hierarchies in CDS ... 515
  • 12.1 ... Hierarchy Categories and Basics ... 516
  • 12.2 ... Annotation-Based Parent-Child Hierarchies ... 517
  • 12.3 ... CDS Hierarchies ... 526
  • 12.4 ... Summary ... 548
  • 13 ... CDS-Based Search Functionality ... 549
  • 13.1 ... Modeling Value Helps ... 550
  • 13.2 ... Free-Text Search Functionality in OData Services ... 570
  • 13.3 ... Enterprise Search Functionality ... 578
  • 13.4 ... Summary ... 583
  • 14 ... Lifecycle and Stability ... 585
  • 14.1 ... Stability Contracts ... 586
  • 14.2 ... Lifecycle of Development Objects ... 590
  • 14.3 ... Deprecation of Development Objects ... 592
  • 14.4 ... Use of CDS Models and Supported Capabilities ... 594
  • 14.5 ... Summary ... 598
  • 15 ... Extensions of CDS Views and Other Entities ... 599
  • 15.1 ... Solution Variants and ABAP Language Versions ... 600
  • 15.2 ... Stable CDS Extensions ... 602
  • 15.3 ... Extensions of Transactional Models ... 615
  • 15.4 ... Summary ... 628
  • 16 ... Automated Testing ... 631
  • 16.1 ... Test Logic of Data Selections ... 631
  • 16.2 ... Test Logic of Transactional Applications ... 658
  • 16.3 ... Summary ... 670
  • 17 ... Troubleshooting ... 671
  • 17.1 ... Performance Aspects ... 671
  • 17.2 ... Pitfalls ... 687
  • 17.3 ... Troubleshoot Implementations of CDS Models ... 698
  • 17.4 ... Troubleshoot Activation Issues ... 706
  • 17.5 ... Examine ABAP RESTful Application Programming Model Applications ... 711
  • 17.6 ... Summary ... 714
  • ... Appendices ... 715
  • A ... CDS Annotation Reference ... 717
  • B ... Migration to the ABAP RESTful Application Programming Model ... 729
  • C ... The Authors ... 737
  • ... Index ... 739


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Product Details
  • ISBN-13: 9781493223763
  • Publisher: SAP Press
  • Publisher Imprint: SAP Press
  • Edition: Revised edition
  • Language: English
  • Returnable: Y
  • Weight: 1758 gr
  • ISBN-10: 1493223763
  • Publisher Date: 30 Nov 2023
  • Binding: Hardback
  • Height: 254 mm
  • No of Pages: 745
  • Spine Width: 40 mm
  • Width: 178 mm


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