RSAM

Posted in 2010

Summary

A poster asked where to find documentation on RSAM (Random Sequential Access Method), the internal access layer used by OnLine/IDS. Art Kagel replied that none exists: RSAM replaced the C-ISAM library used by Standard Engine and, while it has equivalents of the main C-ISAM functions plus much more, it is proprietary and unpublished. The poster then asked whether low-level, isam.h-style database access must therefore be done via 4GL or ESQL/C; the thread ends without an answer to that follow-up.

Auto-generated by DrWatson from the posts below — may be imperfect; read the full thread.

Topics: General Discussion

FRANK COMPUTER — Fri, 02 Apr 2010 20:02:29 — source: IIUG Forums & Mailing Lists

I don't know much about RSAM other than it means "Random Sequential Access Method" and that RSAM functions are what interact with OnLine/IDS. I couldn't find any detailed documentation about it.

↪ replying to FRANK COMPUTER

Art Kagel — Fri, 02 Apr 2010 21:08:22 — source: IIUG Forums & Mailing Lists

There isn't any. The internal RSAM library in OnLine and IDS replaced the CISAM library that Standard Engine used. The main CISAM functions have RSAM equivalents, however, as one would expect, the RSAM library is far more extensive. However, it isn't documented because unlike CISAM, RSAM is proprietary and not published. Art Art S. Kagel Advanced DataTools (www.advancedatatools.com) IIUG Board of Directors (art@iiug.org) See you at the 2010 IIUG Informix Conference April 25-28, 2010 Overland Park (Kansas City), KS www.iiug.org/conf Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on my employer, Advanced DataTools, the IIUG, nor any other organization with which I am associated either explicitly, implicitly, or by inference. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves. On Fri, Apr 2, 2010 at 4:02 PM, FRANK COMPUTER <frank@frankcomputer.com>wrote: > I don't know much about RSAM other than it means "Random Sequential Access > Method" and that RSAM functions are what interact with OnLine/IDS. I > couldn't > find any detailed documentation about it. > > > > ******************************************************************************* > Forum Note: Use "Reply" to post a response in the discussion forum. > > --001517475c8ae176eb0483476002

↪ replying to Art Kagel

FRANK COMPUTER — Fri, 02 Apr 2010 21:29:45 — source: IIUG Forums & Mailing Lists

So if I wanted to write a low-level C isam.h-like program to directly control my interaction with the database, I'd have to do it with 4GL or ESQL/C? (see related reply in Classics/VIEWING RESULTS BEFORE QUERY COMPLETES...)