What must be considered when transitioning ABAP code to SAP HANA?

When transitioning ABAP code to SAP HANA, it's crucial to prioritize performance recommendations for new SQL usage. SAP HANA is designed to handle complex queries efficiently, but the underlying principles of how SQL performs can differ significantly from traditional databases. In a HANA context, optimization strategies change, especially regarding how data is accessed and manipulated.

The focus on performance recommendations allows developers to leverage HANA's capabilities effectively. This includes optimizing database queries by minimizing nesting, choosing appropriate joins, and considering in-memory data processing techniques. As a result, re-evaluating how nested selects are utilized becomes a vital aspect of ensuring optimal performance.

While other considerations may come into play, such as examining the need for indices and reevaluating older code, it is the performance-related changes and recommendations that are primarily significant in the HANA environment. Since HANA utilizes in-memory processing and columnar storage, how queries are structured can vastly influence execution times, necessitating a fresh approach to SQL rather than merely relying on existing practices.