Migration to SAP S/4 HANA Finance
SAP S/4 HANA Finance, On-Premise Edition contains the product SAP Accounting powered by SAP HANA. SAP Accounting powered by SAP HANA contains General Ledger Accounting, Controlling, and Asset Accounting.
Purpose and Target Groups
If you want to implement and use SAP Accounting powered by SAP HANA, you have to migrate the existing user data from the G/L Accounting (FI-GL), Asset Accounting (FI-AA), Controlling (CO) and Material Ledger areas. Such a migration of data is necessary because SAP Accounting powered by SAP HANA rests on a uniform data model for all accounting areas. The comprehensive ACDOCA data table contains all line item documents from FI, FI-AA, and CO. After installation and migration, all postings of the named applications are written in the new tables.
This graphic shows how the various accounting applications merge in the new structure of SAP Accounting powered by SAP HANA.
The following tables were replaced by SAP HANA views with the same names:
The line item, totals tables and application index tables of General Ledger Accounting (GLT0, BSIS, BSAS and FAGLFLEXA, FAGLFLEXT, FAGLBSIS, FAGLBSAS)
The totals tables and application index tables of Accounts Receivable and Accounts Payable (KNC1, KNC3, LFC1, LFC3, BSID, BSIK, BSAD, BSAK)
The line item and totals tables of Controlling (COEP for certain value types, COSP and COSS)
The material ledger tables for parallel valuations (MLIT, MLPP, MLPPF, MLCR, MLCD, CKMI1, BSIM)
The Asset Accounting tables (ANEK, ANEP, ANEA, ANLP, ANLC)
Replacing these tables with views with the same names ensures the continuation of all read accesses to the tables mentioned.
With SAP S/4HANA Finance, you are provided with universal data table ACDOCA, which contains all of the line item documents from FI, FI-AA and CO. All postings of these applications are written to the new table after the installation and migration are complete.
This graphic shows how the various accounting applications merge in the new data structure of the universal journal entry in table ACDOCA.
Notes About Migration
SAP Accounting powered by SAP HANA is based on new General Ledger Accounting (FI-GL (New)) and uses functions such as ledgers to update a particular valuation, and the document splitting function. If you want to use SAP Accounting powered by SAP HANA, but were still using classic General Ledger Accounting until now, migrate the application data for General Ledger Accounting and the necessary settings for the new Customizing, for example ledgers and integration for Controlling.
However, none of the functions of new General Ledger Accounting, such as parallel ledgers and document splitting, are implemented.
For Asset Accounting purposes you use new Asset Accounting in SAP Accounting powered by SAP HANA. During the migration from classic Asset Accounting to new Asset Accounting in SAP Accounting powered by SAP HANA, you migrate Customizing settings and transaction data.
The Migration Process
The migration of existing system configurations, master data, and application data is closely connected to the process for installing SAP S/4HANA Finance. You cannot consider the installation and migration in isolation from each other.
This graphic shows the process steps that are relevant for the installation of the SAP S/4HANA Finance, On Premise Edition and the migration of the accounting and Controlling data.
You have to perform preparatory steps before you install SAP S/4HANA Finance. These include the following application-specific preparations:
Making a preliminary check that ascertains whether SAP S/4HANA Finance can be installed with the current system settings, or whether additional activities are required
Making consistency checks that check the correctness of the accounting data from a technical point of view, and list any inconsistencies
Performing reconciliation between the accounting applications, to enable the data to be merged correctly in the universal journal entry
Carrying out period-end closing including the storage of reporting key figures and closing the posting periods
Once you have carried out the preparatory steps, and have met the prerequisites for implementing SAP S/4HANA Finance, you can proceed to install it.
In the course of installing SAP S/4HANA Finance, the following steps to prepare for the migration are automatically executed by the system:
Creating backup tables for the totals tables and index tables in the Data Dictionary that are being done away with (
*_BCK
in FI and*_BAK
in CO)Saving the totals tables and index tables in backup tables
Deleting the original totals tables and index tables
Creating SAP HANA views (with the same names) for the totals, index, and line item tables
Creating the new table for the universal journal entry
This graphic shows the difference between the classic data model and the new one.
You have to migrate the accounting and Controlling data immediately following the installation. To be able you to undertake this data migration, specific configuration steps are necessary that have been summarized in the implementation guide. There are specific migration and check programs for the migration that have been included in the SAP Reference IMG in their correct order. All of the migration steps are described in the relevant sections included there.
After the migration, you nonetheless have to reconcile the data and perform tests manually.
Constraints
If you want to use new Asset Accounting in SAP Accounting powered by SAP HANA, you are not allowed to use some components and functions at the same time. For more information, see Migration to New Asset Accounting (FI-AA (New)).