Anyone still know IBM RPG?

I'd have to be almost as old as RPG to know who that is :laugh: Haven't seen him around in ages, but then again, I'm not on here as much as I used to...

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Sander Rossel

Kschuler wrote:

They had about a half dozen rpg programmers

With an average age of 80? :D Still, half a dozen ain't bad.

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Gary Wheeler

I first read that as neurotic casual adventurer...

Software Zen: delete this;

Nelek

Sometimes is not that far... :rolleyes: :laugh: :laugh:

M.D.V. ;) If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about? Help me to understand what I'm saying, and I'll explain it better to you Rating helpful answers is nice, but saying thanks can be even nicer.

tronderen

Richard Andrew x64 wrote:

I must say I was impressed with how primitive it was.

I do not know RPG (except by name, for 40+ years), never programmed it, yet I am curious to your criteria for classifying RPG (or any other language as "primitive". Is it primarily because it is lacking certain features (if so: which features?) Or is it primarily for the way it is doing things? I am curious to how well such evaluation criteria - in a language independent from - would classify the languages of today, and their early versions, as "primitive". Was the original strostrup C++ language "primitive"? Was C&R C? Did C# start out as a "primitive" language, but at some version had developed to "non-primitive" and maybe later to "advanced"? I must admit that I think the last half dozen or so revisions of C++ and C# have brought "advanced" features that I'd rather be without!

Religious freedom is the freedom to say that two plus two make five.

Richard Andrew x64

I called it primitive due to its syntax and grammar, because it didn't really have any. This is what I recall from 1998: The function calls, literals, and parameters were entered on a single line by their column positions. For instance, a line that prints a file might look like the following:

PRN DATA K MQ

Where the parameters K, M and Q were codes for the options chosen and they must appear in their designated columns. The K could have been the number of lines to print and the M could have been which report format to use and the Q could have been a modifier of some sort. RPG was named for being a Report Generator language.

The difficult we do right away... ...the impossible takes slightly longer.

Jeremy Falcon

Sander Rossel wrote:

But just out of curiosity, how many here worked on RPG and how many still do, could and/or want to?

I've heard of it, does that count for something? :~

Jeremy Falcon

tronderen

Richard Andrew x64 wrote:

The function calls, literals, and parameters were entered on a single line by their column positions.

I guess I'd agree that this is sort of primitive :-) (But note that a modern, graphical UI based programming, could have boasted the input of parameter in separate input fields, displayed in fixed positions, as one of its notable features :-)).

RPG was named for being a Report Generator language.

From the days I knew it by name, that is what I know of it: A special purpose language, with requirements defined by this special purpose, not for its use as a general-purpose language. The impression I get from the Wikipedia articles about RPG (in its various versions) is that IBM has been trying to force its application domain to be extended far beyond report generation, way beyond. Many languages have been ruined by that kind of thinking, having 'features' added that do not belong in that language. One of fascinating things about dotNet (and similar virtual machine environments) is that it defines a platform where you can provide partial solutions in a multitude of languages: You use XAML for setting up user interfaces, C# for treating data input or output through these, LINQ for handling tabular data, you could in principle have dotNet modules handling array data in APL and string data in Snobol ... Generally speaking: You can create partial solutions in languages specifically tailored to that subproblem, rather than expanding your favorite language to handle every possible problem in the entire world, obviously at the expense of a tremendously complex language. Looking at the development of modern languages, it seems as if I am on a collision course with most language developers. Noone seems to be saying "We'll leave that to a module in a report generator language", or "matrix processing language", or "string processing language". They all cry for extensions for doing everything in their "home language", rather than leaving some jobs to the specialists. I am wishing for a programming language world where it is fair to say, "You can do this better than me". I am not holding my breath waiting for that to become reality.

Religious freedom is the freedom to say that two plus two make five.

Mycroft Holmes

Sander Rossel wrote:

My guess is they'll HAVE TO replace it in the coming ten years or so and it would be better to start working on a replacement NOW

I :laugh: :laugh: :laugh: I think this should be called the ostrich development method! Sooo many organisations do this.

Never underestimate the power of human stupidity - RAH I'm old. I know stuff - JSOP

Vivi Chellappa

RPG IV is a modernized version of the original RPG, Report Program Generator. I managed an AS/400 installation. Never programmed it but figured out how the language was designed. The predecessors to the AS/400 were the IBM System/3, System/32, and System/34 computers. These were built to replace the much earlier accounting machines that used punched cards for input. These machines were programmed using a plugboard with wires connecting the various holes in the plugboard. ENIAC, anyone? You had fixed positions on the punched cards for various data (operands). These data were read by the accounting machine, and the wires in the plugboard got the electrical impulses representing these operands. Necessarily, they corresponded to the fixed fields on the punched cards where those operands are positioned. The operator representing the operation to be performed — such as addition, subtraction, multiplication and division or printing — would be wired on the plugboard. As the card reader read in the punched cards, much clanging of the relays happened and the simple calculations of the accounting machine were accomplished. The System/3 replaced the electromechanical relays with electronic switching systems and the plugboard and wires with the RPG language designed to mimic them. Then IBM introduced the System/38, the true predecessor (in terms of processor architecture) to the AS/400. For backward compatibility, IBM allowed the original primitive plugboard (wired program) programs to run on the System/38 and the AS/400 by providing the RPG compiler on these machines. Hundreds if not thousands of various accounting systems software could now run on the AS/400. You are talking about the computer introduced in 1989 (the AS/400) running programs written for a computer introduced in the very early 1960s (the System/3) which was emulating a 1930s accounting machine (IBM 304)! Entire MRP (Manufacuring Requirements Planning) systems, the predecessor to the ERP systems of today, were created on the System/38 in RPG II, as those machines were suitable price wise, for the medium scale businesses. These programs run perfectly on the AS/400 and many software vendors saw no reason to migrate them to C or C++ or even COBOL on the AS/400. One company, BCPL, decided to rewrite their MRP system in modern C for the AS/400. After spending $400 million on the rewrite, which was around their annual revenue, they failed and went bankrupt. The moral of the story is: let sleeping dogs lie and d

Vivi Chellappa

IBM persuaded some community college in the US to teach the RPG language by donating an AS/400. For the life of me, I can’t recall the name or location of the college. I left the field 20 years ago. I am sure they would have taught RPG IV. RPG II was a bear that, even those who knew the language, didn’t want to mess with if it came to modifying the programs.

pkfox

In Clippers early days it was largely used as a compiler for Ashton-Tate dbase - but it was so much more

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Gwyll

I have a friend that can't retire at 70 because she's a 35yr RPG expert. Makes over $300/hr. fixing critical issues and has a backlog of waiting clients.