Re: 5250 and un-do

I have yet to work with anything beyond office graphics and word processing type software that allows unlimited undo Booth.

I've not seen any accounting software or similar office functions that allow it.

In a single user single function environment (spreadsheet, email, etc.) it makes sense - but it has enormous problems in a multi-user environment.

Suppose I do a stock adjustment and change the number in stock from 50 to 45. 10 minutes later I realize that I made the adjustment to the wrong item. I can't simply undo that change if two or three sales may have been made in the meantime. There may now only be 25 items in stock. I can't reset to 50 - so you have to unpick the whole trail. That trail might include the fact that orders were rejected because of insufficient inventory - are you going to have the system phone that customer and say that the order is now OK? It is just a can of worms that I just cannot see an easy solution to.

Are you sure you're not trying to provide functionality that doesn't actually exist in the real world? For good reason.


Jon Paris

www.partner400.com
www.SystemiDeveloper.com

On Dec 16, 2017, at 11:27 AM, Booth Martin <booth@xxxxxxxxxxxx> wrote:

Commit and rollback, if I understand it, is one-shot deal. If you make 15 entries and then rollback you lose all 15 changes. If you commit, you lose all rollbacks. This may well be wrong; my understanding of commit & rollback is limited.

The business thing is a subfile of data, say 4 columns, all can be changed, deleted, or even added. Whether the data file is updated or not is related, yes, but not immediately relevant to the situation that concerns me. updated or not, I want to replicate the Ctrl-z behavior and be able to undo changes, one at a time, for, say, 15 changes or until start of the session.

My first thought is that I have to keep an array of changes and read them back 1 at a time but this has got to be a wheel that is already invented? The rest of the world has had repeat un-do for 30+ years.



On 12/16/2017 9:51 AM, Buck Calabro wrote:

On 16 December 2017 at 10:21, Booth Martin <booth@xxxxxxxxxxxx> wrote:

Is there an repeat-undo process in RPG? Something similar to Ctrl-z in text
editors?

I was going to suggest COMIT and ROLBK but I got mentally hung up on 'editor'.
What business thing are you trying to do?
--buck

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