Writes include inserting, modifying, and deleting content in database tables. All writes can be made
as individual accesses or as mass access. If multiple rows of a database table are to be changed, mass access using internal tables generally gives better performance than individual accesses.
When making writes, always pay attention to data consistency. The
LUW concept is designed for this purpose. In application programs of an AS ABAP, the implicit
database LUWs are normally not sufficient for consistent data storage. Instead, explicit
SAP LUWs need to be programmed, which normally contain multiple database LUWs.
When making writes to a database table for which a database cursor is open in a SELECT loop or opened by using
OPEN CURSOR, the results set is database-specific and undefined. Avoid this kind of parallel access if possible.
Write access to tables or classic views with replacement
objects is still performed on the database table or the classic view and lead to a syntax warning.