Code Review Checklist for Sap Abap

Standard Operating Procedure: Code Review Checklist for SAP ABAP

1. Document Control & Revision History

2. Executive Summary & Scope

This SOP defines the mandatory technical audit framework for all ABAP-based developments within the SAP landscape (S/4HANA and ECC). The scope encompasses custom code objects, enhancements (BAdIs/User Exits), and modifications. Compliance with this procedure is mandatory to ensure system performance, data integrity, security, and maintainability. Non-compliant code will be rejected at the transport release stage.

3. Prerequisites & Tool Requirements

• Environment Access: SAP GUI / Eclipse (ADT) with CTS+ (Change and Transport System) authorization.
• Tooling: SAP Code Inspector (SCI) / ABAP Test Cockpit (ATC) configured with the global enterprise check variant.
• Documentation: Functional Specification (FS) and Technical Design Document (TDD) approved in Jira/Solution Manager.
• Privileges: S_DEVELOP (Package, Class, Program, Table maintenance) and S_CTS_ADMI (Transport management).

4. Roles & Responsibilities (RACI Matrix)

5. Step-by-Step Operational Procedure

Phase 1: Automated Validation

• Execute global ATC check against the transport request.
• Validate that all findings categorized as 'Error' are remediated.
• Review 'Warning' findings; document justifications if they remain unfixed.

Phase 2: Structural & Performance Audit

• Verify use of optimized Open SQL (CDS views preferred over SELECT *).
• Confirm no SELECT statements reside within LOOP structures.
• Ensure proper use of buffering/internal table indexing (Sorted/Hashed tables for large datasets).

Phase 3: Security & Maintainability Audit

• Check for hardcoded credentials, client IDs, or server IPs.
• Confirm Authority-Check implementation for all custom T-codes and sensitive business objects.
• Validate modularization (Function Modules/Classes) and adherence to object-oriented principles.
• Ensure proper error handling and logging (Application Log / SLG1).

Phase 4: Final Sign-off

• Confirm alignment with the original TDD requirements.
• Verify that transport naming conventions adhere to enterprise standards.
• Final peer-review sign-off logged in the Change Management ticket.

6. Quality Assurance & Verification Criteria

• Acceptance Benchmark: 0 Critical Findings; 0 High-risk Security vulnerabilities.
• Tolerance Thresholds: Max 5% of code block cyclomatic complexity index exceeding threshold (must be documented).
• Performance Benchmark: Execution time for reports must not exceed defined SLA for target volume; memory consumption must pass the ABAP Runtime Analysis (SAT) test.

7. Practical Troubleshooting Scenarios

Scenario A: Massive Runtime Dump (TIME_OUT) in Production

• Diagnosis: Missing WHERE clause or non-indexed field in a SELECT statement on a high-volume transparent table (e.g., BSEG).
• Corrective Action: Immediate reversal of transport. Execute SAT trace in the Development system to identify the inefficient SQL statement. Apply secondary indexes or refine the selection criteria. Re-submit only after performance benchmark pass.

Scenario B: Security Vulnerability (SQL Injection Risk)

• Diagnosis: Use of dynamic SELECT strings concatenated with user input variables.
• Corrective Action: Quarantine the code. Refactor using dynamic token binding (@ syntax) or CL_ABAP_DYN_PRG class for input sanitization. Mandatory re-audit by the Security Lead before transport release.

Scenario C: Unintended Data Overwrite (Concurrency)

• Diagnosis: Missing ENQUEUE / DEQUEUE locks in a multi-user custom maintenance transaction.
• Corrective Action: Implement standard SAP locking objects. Ensure all UPDATE statements are preceded by CALL FUNCTION 'ENQUEUE_...' and verified against SY-SUBRC.