SAP Landscape Transformation (SLT) replication server uses a trigger-based replication approach to pass data from source system to target system.

The SAP SLT server is the standard real-time replication tool for SAP ABAP-based source systems among others to various SAP products and applications as well as to SAP HANA database and all further databases supported by SAP. The data replication functions within SAP Landscape Transformation use database triggers (SLT trigger) to record changes for all types of tables such as application tables, customizing tables, or switch tables.

During its standard execution, the Software Update Manager goes through several phases to check for relevant SLT triggers to avoid later issues. For more information, see also in the SUM Guide the section Running the Software Update Manager    Making Entries for the Checks Roadmap Step    Checking for Database Triggers (SLT) on Switch Tables and Tables to be Converted (Phases RUN_CHECK_SLT_TRIGGER_*).

However, if you run the Software Update Manager with a database migration option, the checks for database triggers are not available. You must manually re-create the database triggers and reload them initially afterwards.

In the following you get a rough overview about the procedure in the DMO scenario: