Adabas
Adabas ( A daptable Da ta ba se S ystem) is a database management system of the Darmstadt Software AG .
It was initially developed by Peter Schnell for the mainframe computers from IBM - under z / VSE and MVS - and Siemens - under BS1000 and BS2000 . The first installation took place in 1971. Over the years, Adabas has also become available for other platforms (such as VMS from DEC , various Unix systems, Linux , Windows ). Adabas is often used as a high-performance database well into the tera range; but also as a departmental or even desktop database for Software AG applications , especially if these are applications in Natural .
Adabas is usually not used by private users, as the underlying concepts and access methods require a considerable amount of learning.
Adabas is based on the NF² database model. NF² stands for NFNF = non first normal form . It should actually be called NOFNF ( not only first normal form ). Adabas is not limited to saving the data exclusively in the first normal form according to the usage of the relational theory . Rather, it is possible, if necessary, to save one-dimensional arrays ( multiple fields ) and even two-dimensional arrays ( multiple fields in period groups ) directly.
Adabas has several options for storing compressed data.
Adabas also offers additional features to users who want to make database content usable via SQL (Adabas SQL Gateway) or a service-oriented architecture (Adabas SOA Gateway).
In addition to Adabas, there is also a relational database called Adabas D , which, apart from its name, has nothing in common with Adabas. The D here stands for Department . For better distinction Adabas was temporarily from Software AG as Adabas C respectively. The C stood for Central . However, this name has been given up again in recent years.
The current version on the market is Adabas 2006 with real-time data access from any location and support for mainframe, Linux, Unix and Windows platforms.
literature
- Michael Schlüter: Introduction to programming with Natural & Adabas (= programming complex systems . No. 4 ). 3rd, corrected and supplemented edition. Lehmanns Media, Berlin 2019, ISBN 978-3-86541-994-1 (382 pages).