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This article mainly analyzes the relevant knowledge of the historical modification record of SAP MM reservation documents, the content is detailed and easy to understand, the operation details are reasonable, and has a certain reference value. If you are interested, you might as well follow the editor to have a look, and follow the editor to learn more about "what is the historical revision record of SAP MM reservation documents".

What is the historical modification record of SAP MM reservation documents?

In the author's eyes, SAP system is a highly rigorous software system. Users in the SAP system related operations, the system will record. When users add or delete the relevant documents of the system, the SAP system has reserved change history, and it is very convenient for people to query these change history. However, the author found that not all documents are modified, the SAP system provides a good way to query change history, such as Reservation documents.

The following reservation order ITEM, the author has changed the quantity from 80 to 81

The author tries to find the change history of the reserved document, just like the way of querying the modification records of other documents, looking for many menus in the MB23 transaction code, but can not find it.

Looking up the information on the Internet, it is found that the SAP standard system does not retain the change history information of the reserved documents. It seems that SAP keeps traces of additions, deletions and changes to facilitate the rigorous style of follow-up traceability, and the implementation is not thorough! Of course, SAP system for any document changes are recorded in the table CDHDR & CDPOS, but in the standard system, the data in these two tables, for business users, can not be easily queried.

SAP NOTE 1927840 is for reference.

1927840-Change log for reservations

Symptoms and signs

Create a purchase requisition with reference to a reservation, and then change the delivery date, for example, in a transaction ME52N.

The field RESB-BDTER is updated as the delivery date changes, but is not written to the change log.

You want to record changes to your reservation.

Reproduce the problem.

Call the booking MB22 in the transaction.

Please change your reservation.

Save your changes.

There is no change log.

Reason

This is a standard SAP system design.

Resolution

You can find USER EXIT_SAPMM07R_001 in the enhanced version of MBCF0007.

This user exit is called directly after the COMMIT WORK statement in MB21/MB22 and contains information related to the details of the old and new items in the table RESB.

You can use this user exit to update booking changes to the customization table.

The standard change log tables are CDHDR and CDPO.

If you want to use these tables as part of custom development to capture subscription changes, you must pay special attention to performance because these tables are usually very large.

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