Thank you for the question.
I would like to recommend you to look through the whole chain of blogs I have written. All of them describe exactly the required situation with data replication from HANA to ORACLE database.
https://www.int4.com/smart-data-integration-sdi-initial-setup-%EF%BB%BF/
https://www.int4.com/sap-eim-smart-data-integration-sdi-roles-and-privileges/
https://www.int4.com/smart-data-integration-sdi-source-data-preparation/
https://www.int4.com/smart-data-integration-sdi-flowgraph-data-processing/
https://www.int4.com/smart-data-integration-sdi-scheduling-and-monitoring/
Thank you for the question.
Initially SDI is design to replicate database tables data from different sources into HANA database.
I would recommend you to have a look on the following video: https://www.youtube.com/watch?v=fMHtThY3cQA
Really hope it can help you.
]]>