[Info-vax] Oracle Database vs Oracle/Rdb

[Neil Rieck]

On Wednesday, June 19, 2019 at 1:18:05 AM UTC-4, DTL wrote:
> from application/VMS--(local)--RDB/VMS to 
> application/VMS--(local)--OraDB/VMS.
> 
> The Customer wants (why? dunno yet) to "move from Rdb to Oracle" (sic) in the same environment, with no modifications whatsoever.

That may not be possible depending upon how the customer is using Oracle-RDB. Recall that RDB was developed by DEC as a successor to RMS. Certain DEC languages, like COBOL and BASIC, have builtin support for RMS while other DEC languages provide indirect RMS support via the linker.

To the best of my knowledge, no so-called DEC languages provide builtin support of RDB but some very cool developer tools exist which will allow you to compile-in RDB support. If your customer is not doing this then RDB is no different than Oracle-db or any other SQL product which means you will access the engine with a connector.

Neil Rieck
Waterloo, Ontario, Canada
http://neilrieck.net/docs/openvms_notes_rms_rdb.html#rdb