Change documents
Change documents
SAP® provides different techniques to fulfil the legal requirements related
to change history. One is the logging of table changes ;
another technique is realised with the help of change documents.
Change documents only keep track of changes. Tracking the creation of
data records is not part of it. The change documents are controlled via
so-called change document objects.
These objects are administrated via transaction SCDO.
Exhibit: SCDO
For each available object, SAP® has defined the corresponding tables for
which change documents are supposed to be created.
Exhibit: SCDO - object – table reference overview
The change document objects are stored in the table
TCDOB together with the individual table assignments.
Exhibit: TCDOB - object – table reference overview
One of the main differences is that only especially selected fields are part
of the change history whereas table logging always includes all fields.
Another pretty handy transaction to identify the applied logging technique
for a table is the transaction AUT01 [Maintain]/AUT03 [Display].
Exhibit: AUT01 – table example BKPF
Here you can also check what kind of logging is provided for tables,
change document objects or even transactions.
The change document information is stored in tables again.
The table CDHDR has the change document header information
whereas the table CDPOS has the item information.
The change document number is part of the object id OBJKTID [Object value]
in case you have to search for a special document.
The reports RSSCD100 provides an overview of change documents,
and the report RSSCD150 the detail view.
The report RSSCD110 allows even cross-client evaluation of change documents.
The deletion of change documents is only allowed during the retention period,
if a full back of the complete change history is available at any time that provides
the all information.
Therefore the authorization on the object S_SCD0 with activity 06 may only be
available through an emergency user in a production environment.
The deletion report RSCDOK99 should also get special attention by protecting
the report with a special authorization group.
Changes to change document objects are logged with the help of the
change document object AENDBELEG and should usually not occur.
Creation / Change of change document objects - Overview
Change document object are created within transaction SCDO.
The field selection maintenance for the logging is executed via transaction SE11.
Within the data element maintenance you can activate the change document attribute.
Exhibit: Change document indicator
Change document object needs to be generated as part of the creation process. With that a function module is created that leads the required logging information in the source code.
The individual function modules need to be integrated into any ABAP/® program that is involved in table updates. The above steps are covered for all SAP® standard change document objects of course, and only need to be executed for customer specific developments or changes to standards which can generally not be recommended.
After setting the indicator you need to go back to transaction SCDO,
and execute
.The individual function modules are listed in the generating info within SCDO
for every change document object.
Exhibit: function modules
