SAP MDG : Dynamic Field Control Via Custom Rule Engine, Dynamic Yet Powerful !

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 Reimagining SAP MDG Field Validations: Low-Code Approach | Simplifying Complexity in SAP MDG-F: Dynamic Field Control via Custom Rule Engine | UI Field Control Made Simple – Hide, Show, Require or Optional.


Working with SAP MDG (Master Data Governance) often means balancing two realities: robust governance and agile adaptability. One of the common we face during MDG implementation is managing field validations with user-friendly alerts.

Whether a field should be hidden, mandatory or optional often depends on multiple factors like CR type, entity, company code or user role. Traditionally, these validations are implemented via BRF+ expressions, Enhancements in feeder classes, Hard-coded logic in the UI layer/BAdIs.

    

The Problem: Code Dependency in Field Validation

MDG validations are crucial for maintaining clean and consistent master data. However, the standard methods come with limitations & most teams rely on:

  • Feeder class logic: Feeder class enhancements require ABAP expertise and testing cycles.
  • UI rule maintenance is scattered and often difficult to track.
  • BRF+ rules or hardcoded validations code: Every new business scenario (e.g. different behaviour based on company code or region) means new logic and testing.
  • No centralized view of how validations are controlled across the application.

- While these are functional, they’re rigid, developer-dependent, and non-scalable. This complexity makes it difficult for functional/ business teams to adapt validations quickly and every change creates a dependency on development teams reducing agility.


Challenges: Too Much Code, Too Little Agility

            • Hide/show fields based on Role UI logic is non-transparent.
      • Maintain field rules over time - Static logic -No visibility for business teams.
      • The key pain point: Every small validation change turns into a development cycle.

- But what if we could avoid coding and development cycle every time specially for simple level properties or validations, yet still provide fully dynamic, context-sensitive field behaviour.



Solution: Rule the Config-Driven Field Validation Framework [ All In One Place]

To address these challenges, a custom configuration table was designed to serve as a central validation engine covers easy level validations. Field behaviour across various MDG entities and scenarios was defined through this table eliminating the need for code changes every time.

- These rules are consumed at runtime ensuring the UI responds dynamically based on master data context.

- Validation Types : M = Mandatory, O = Optional, H = Hidden, R = Read Only

- This table is maintained via a simple maintenance view or SM30 transaction/T-Code assigned to TMG accessible to key users or functional consultants.

All this happens without modifying feeder classes or enhancing the UI every time.


Benefits of This Approach

  • No More Coding: New validation rules don’t require any ABAP changes at-least for simple validations.
  • Business Empowerment: Functional/Business teams can maintain rules via a user-friendly view.
  • Central Governance: One place to view and manage all field control rules along with by whom & when It’s added or changed.
  • Audit-friendly: clearly see why and when a rule applies.
  • No BRF+ overload: clean separation of decision logic.
  • Faster Change Cycles: No transports or regression testing required for every new validation rule.
  • Scalable to all MDG domains MDG – S,M,C (Supplier, Material, Customer)

Real Impact

  • After rollout: Reduced ~70% of validation-related change requests.
  • Built an enterprise-grade, reusable framework used across modules.
  • Delivered faster time-to-compliance for changing regulatory/market needs.
  • It's a shift from “write code to validate” ➝ to “configure to adapt”

How It Works: Plug-In Logic, Zero Enhancement for later changes

  1. Custom Table is maintained in SM30 or Z/Y T-code (or via custom UI).
  2. Lightweight enhancement logic is added once to retrieve rules based on runtime values.
  3. The UI behavior adjusts: field becomes hidden, read-only mandatory or optional.
  4. No need to touch feeder classes again & ever.
👉 Read my full article along with implementation on Reimagining SAP MDG Field Validations here.

#SAP | #MDG | #SAP Master Data Governance | #SAP ABAP Development | #UI_Validation | #Fiori | #NWBC | #Governance | #ABAP | #DynamicVal

- Published By Nimi Soni



        

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Copyright © Nimi Soni, 2025








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