Editing Oracle Rdb (section)

==Rdb on other platforms==

'''VAX Rdb/ELN''' was the name of Digital's relational database for the [[VAXELN]] operating system. Despite sharing the Rdb name, and being announced at the same time, Rdb/ELN was not based on Rdb/VMS, or vice versa.<ref>{{cite journal|url=https://ieeexplore.ieee.org/document/5187227|date=April 1984|access-date=2020-11-12|title=DEC launches new top-end VAX|doi=10.1049/ep.1984.0129 |url-access=subscription}}</ref> Rdb/ELN was created by [[Jim Starkey]], and was the first commercially available database to use [[Multiversion concurrency control]].<ref>{{cite web|url=https://firebirdsql.org/en/multi-version-concurrency-control/|website=Firebirdsql.org|access-date=2020-11-12|title=A not-so-very technical discussion of Multi Version Concurrency Control}}</ref>

Ports of Rdb previously existed or were planned for [[Tru64]] and [[Microsoft]] [[Windows NT]].  Demand for the [[Tru64]] version was so low that support was dropped. The Windows NT port was never released as Oracle could not obtain support on the [[BLISS]] compiler necessary for this platform. In order to port Rdb to these platforms, an abstraction layer named the Common Operating System Interface (COSI) was implemented to isolate the database from the underlying operating system.<ref>{{cite web|url=https://download.oracle.com/otndocs/products/rdb/pdf/tech_archive/port_rdb_to_itanium.pdf|date=2002|access-date=2020-11-15|title=Porting Rdb to Itanium|website=Oracle.com}}</ref>

Digital provided a relational database for their [[Ultrix]] operating system named '''ULTRIX/SQL''', but it was based on [[Ingres (database)|Ingres]] instead of Rdb.<ref>{{cite web|url=http://bitsavers.trailing-edge.com/pdf/dec/vax/ultrix-32/4.0_Jun90/AA-PBZ8A-TE_ULTRIX_SQL_Database_Administrators_Guide_Jun1990.pdf|title=ULTRIX/SQL Database Administrator's Guide|date=June 1990|access-date=2020-11-12|website=Bitsavers.org}}</ref>