How does SAP HANA ensure data integrity?

SAP HANA ensures data integrity primarily through transactional control mechanisms such as commit, rollback, and isolation levels. These mechanisms play a crucial role in maintaining the accuracy and reliability of data during transactions.

When a transaction is executed, SAP HANA uses the commit statement to finalize all changes made during that transaction. If an error occurs or if a decision is made to reverse the changes, the rollback statement allows the database to revert to the previous state, ensuring that incomplete or erroneous data does not persist in the system. Furthermore, isolation levels are used to define how transaction integrity is visible to other transactions. They control the visibility of changes made in one transaction to other concurrent transactions, thereby preventing issues such as dirty reads, non-repeatable reads, and phantom reads. This multi-faceted approach effectively supports ACID properties (Atomicity, Consistency, Isolation, Durability), thereby safeguarding data integrity.

While data encryption, user access management, and backup strategies are important aspects of a comprehensive data security and availability framework, they do not directly address the mechanisms required to maintain data integrity during transaction processing.