Understanding CDHDR and CDPOS Tables in SAP

Ruhani Garg

2 min read

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Mar 13, 2026

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In SAP systems, data transparency and traceability are critical. Whenever a business document or master data is changed, SAP keeps a record of those changes.

This is where CDHDR and CDPOS tables come into the picture.

Think of them as SAP’s change history tracker.

CDHDR — Change Document Header

The CDHDR table stores the header-level information about a change.

It answers questions like:

1. Who made the change?
2. When was the change made?
3. Which object was changed?

Key fields include:

1. OBJECTCLAS — Object class (e.g., MATERIAL, VERKBELEG, etc.)
2. OBJECTID — Object identifier (like Material Number or Sales Order)
3. CHANGENR — Change document number
4. USERNAME — User who made the change
5. UDATE / UTIME — Date and time of the change
6. TCODE — Transaction used for the change

You can think of CDHDR as the summary of the change event.

CDPOS — Change Document Items

The CDPOS table stores the field-level details of the change.

It answers:

1. Which field changed?
2. What was the old value?