What is the SAP S/4HANA simplified data model?

SAP S/4HANA consolidates many ECC tables into fewer, larger tables optimized for HANA. The key example is ACDOCA (Universal Journal), which combines FI, CO, ML, and AA postings into a single table. CDS Views then provide the application-level data model on top.

What is the ACDOCA table in SAP S/4HANA?

ACDOCA is the Universal Journal table that stores all financial postings (FI, CO, ML, AA) in a single table. It replaces many legacy tables (BSEG, COEP, MLCD, etc.) and is a cornerstone of the S/4HANA simplified data model.

Guide July 19, 2026

Understanding the SAP S/4HANA Data Model

SAP S/4HANA consolidates data into a simplified structure. Learn how its core tables, universal journal, and CDS Views form a coherent data model.

The Simplified Data Model

One of the biggest changes from SAP ECC to S/4HANA is the simplified data model. SAP eliminated many aggregate and index tables, consolidating data into fewer, larger tables optimized for the SAP HANA in-memory database.

Key Tables

The most important tables in S/4HANA include:

ACDOCA — Universal Journal: Combines FI, CO, ML, and AA postings into a single table. Replaces BSEG, COEP, MLCD, ANEK, and others.
MATDOC — Material Document (replaces MSEG): All goods movements in a single table
BKPF — Accounting Document Header (still exists in S/4HANA)
VBAK / VBAP — Sales Order Header / Item
EKKO / EKPO — Purchase Order Header / Item

The Role of CDS Views

While the table structure is simplified, CDS Views provide the application-level data model. The Virtual Data Model sits on top of these core tables and provides:

Business-friendly field names (e.g., CompanyCode instead of BUKRS)
Cross-module joins (e.g., combining sales data with finance data)
Analytical views for embedded analytics
Stable APIs through release contracts

Compatibility Views

SAP provides compatibility views that emulate legacy ECC tables (like BSEG) by reading from the new tables (like ACDOCA). This ensures that existing custom code continues to work, though with reduced performance.