Which operation is executed before a table is repartitioned?

The process of repartitioning a table in the context of HANA involves redistributing the data across the available partitions to optimize performance and storage. Before such an operation is executed, a delta merge is typically performed. The delta merge consolidates the delta storage (where recent changes are temporarily stored) with the main storage of the table. This is essential because repartitioning operates on a complete and consistent view of the data in the main storage.

By executing a delta merge before repartitioning, it ensures that all changes made to the data are committed and that the repartitioning process works with the most current data state. This helps maintain performance and data integrity during the repartitioning operation. Without this step, there could be discrepancies in the data that can lead to inaccurate results or unnecessary performance overhead during the repartitioning process.

The other choices do not need to occur prior to repartitioning in the same way. A backup, while important in a data management strategy, does not specifically relate to the repartitioning process. Data migration refers to moving data from one system or storage space to another and is not inherently part of repartitioning. Table compression deals with optimizing storage space but does not directly precede repartitioning as a prerequisite