ABAP® Programming for SAP HANA® – HA400 — Lesson 2: Modern Open SQL, CDS Access, and Efficient Data Retrieval

Learning Objectives

• Explain how Modern Open SQL, CDS Access, and Efficient Data Retrieval supports efficient ABAP execution.
• Complete the workflow and produce a reviewable modern data-access refactoring workbook.
• Evaluate the condition where a rewritten query changes duplicate handling and produces different business totals and select a supported response.

Detailed Topics

• Open SQL expressions: document sequence, decision points, and handoffs required for correct transaction execution.
• Joins and aggregations: determination logic and master-data influences that shape the resulting SAP document flow.
• CDS view consumption: status changes, confirmations, messages, and operational evidence produced during processing.
• Internal table and buffering considerations: exception paths and recovery choices needed when normal processing cannot continue.

Instructor Demonstration

The instructor models an end-to-end decision path covering Open SQL expressions, Joins and aggregations, CDS view consumption, Internal table and buffering considerations. Navigation, documents, configuration influences, authorization boundaries, and retained evidence are connected to modern data-access refactoring workbook, including a controlled test where a rewritten query changes duplicate handling and produces different business totals.

Hands-On Exercise

Complete a controlled activity covering Open SQL expressions, Joins and aggregations, CDS view consumption, Internal table and buffering considerations and preserve the final result in modern data-access refactoring workbook.

1. Define the expected business result and the SAP objects that should produce it.
2. Perform the lesson scenario, capturing before-and-after evidence for every material decision.
3. Test the exception without changing unrelated settings or data, then explain the first divergence.
4. Apply proportionate remediation and complete a focused regression test before handover.

Scenario Analysis

• Which SAP object, rule, master record, or process step most strongly influences the observed result?
• What evidence distinguishes a configuration problem from data, authorization, integration, or timing causes?
• How should the modern data-access refactoring workbook be approved, retained, monitored, and updated after handover?

Troubleshooting Guidance

Start at the earliest point where expected SAP behavior differs from the observed result. Review process sequence, master data, organizational assignments, configuration, authorization, integration, and timing separately. Treat “a rewritten query changes duplicate handling and produces different business totals” as a testable hypothesis until settings, documents, logs, reports, and retest outcomes confirm the cause.

Validation Checklist

• Required structures, master data, roles, settings, and dependencies for Modern Open SQL, CDS Access, and Efficient Data Retrieval are present.
• The modern data-access refactoring workbook connects each conclusion to objective, reviewable SAP evidence.
• Normal processing, the stated exception, integration behavior, and access boundaries were tested.
• Corrections, retest criteria, ownership, documentation, monitoring, and operational handover are complete.

Lesson Outcome

Learners can apply Modern Open SQL, CDS Access, and Efficient Data Retrieval, explain the resulting SAP behavior, and defend the outcome through modern data-access refactoring workbook.