Which features are provided by the database interface?

The database interface in SAP plays a crucial role in bridging the communication between the ABAP application layer and the underlying database system. One of its primary functions is to convert Open SQL statements, which are written in ABAP, into the specific database statements (such as SQL commands). This conversion process is essential because different database systems may have their own SQL dialects and query optimizations. By translating ABAP's Open SQL into the correct format for the database, the database interface allows developers to write database-independent code while still leveraging the performance capabilities of the underlying database.

The other features listed, while relevant to data management and integrity, do not directly pertain to the core functionality of the database interface. The access to SAP table buffers relates to how the data is retrieved and stored temporarily to improve performance, but it does not involve the conversion of SQL statements. The data consistency check utilizing foreign key relationships is an important aspect of data integrity and schema definition in the database, but it is not the responsibility of the database interface itself. Lastly, syntax checking of Native SQL commands occurs at runtime when executing SQL commands directly against the database, which is a different aspect of database interaction.

Thus, option C accurately defines a fundamental feature of the database interface, focusing on