Editing IBM Db2 (section)

=== Db2 for z/OS - evolution ===
In 1995, GA (general availability) of V4. It introduced "data sharing": several DB2 engines access the same data. Advantages: performance and availability (if one DB2 engine fails or is migrated to the next version).

In 1997, GA of V5. It added, e.g., online reorganization of tablespaces.

In 1999, GA of V6. It added object-relational support. "Objects" here mean data items longer than 32K (up to then the maximal length of a table row, more precisely a table record), such as images, videos, or text. DB2 could now store and handle such objects. Furthermore, it added trigger support.

In 2001, GA of V7. It added, e.g., dynamic allocation of data sets (~files on z/OS), and the ability to let utilities run on lists of tablespaces. Furthermore, real-time statistics, scrollable cursors, and initial Unicode support.

In 2004, GA of V8. It added, e.g., 64-bit support. New index types (notably DPSI), recursive SQL. Internal catalog is converted to Unicode.

In 2007, GA of V9. It added, e.g., Trusted Context (a security feature), and "native XML" support.

In 2010, GA of V10. It added, e.g., Temporal Tables (e.g., row history), security features like separation of system and security administrators, and RCAC (row column access control).

In 2013, GA of V11. It added, e.g., JSON support.

In 2016, GA of V12. It added, e.g., RESTful services; and usage of AI to optimize the selection of the access path to the data, thus enhancing performance.

On May 31, 2022, IBM released Db2 13 for z/OS.<ref>{{Cite web |date=2022-04-05 |title=IBM Db2 13 for z/OS delivers leading-edge AI innovations and enhancements, reinforcing it as the foundation for enterprise computing within the hybrid cloud and digital world |url=https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/3/897/ENUS222-003/index.html |url-status=live |archive-url=https://web.archive.org/web/20220817000108/https://www.ibm.com/common/ssi/ShowDoc.wss?docURL=/common/ssi/rep_ca/3/897/ENUS222-003/index.html |archive-date=2022-08-17 |access-date=2022-06-21 |website=www.ibm.com |language=en-US}}</ref>