The Virtual Data Model is one of the primary building blocks of the S/4HANA architecture. Its technical foundation is provided by
ABAP Core Data Services (CDS). The key benefits of the CDS framework are:
- Many new SQL features:
- SQL joins: INNER JOIN, LEFT OUTER JOIN, ...
- SQL set operations: UNION, UNION ALL
- SELECT clauses: GROUP BY, HAVING
- Aggregate functions: AVG, MAX, SUM, ...
- Numeric functions: CEIL, MOD, ABS, ...
- String functions: SUBSTRING, LPAD, CONCAT, ...
- Date and time functions: DATS_DAYS_BETWEEN, DATS_ADD_DAYS, ...
- ...
- Easy-to-integrate services on-top:
- OData clients
- SAP Fiori
- Analytics
- Simplification of application coding
- Push-down of workload into the HANA database
Since the technology is fairly new it poses quite some challenges to you as system administrators or development teams. You need to
- ensure that the maintenance level of their software stack is up-to-date,
- keep an eye on the overall CDS work load,
- monitor and tune the performance of complex queries, and
- establish clear rules for the development of own code using CDS.
Fortunately, a best practice guide is now available on how to implement, monitor and tune CDS based applications within S/4HANA. The document provides an holistic approach to CDS and is written for IT architects, ABAP developers, SAP Basis teams and database administrators. Regular updates are planned.
Direct Link:
ABAP Core Data Services | SAP S/4HANA – Best Practice Guide
Short URL:
https://tinyurl.com/ABAP-CDS-inside-S4HANA
Last update of the guide:
7-Feb-2020
