When I tore apart an Image base years ago, I was surprised at how little
info is in the data sets - almost nothing but data and pointers. The root
holds set names in a list, then items (or maybe vice-versa), then set
definitions (lists of items etc). If you listf -3 the root, it shows the
number of labels, which is where the definitions are stored. The sets only
have one lable, so there is nowhere to store more info. IIRC that is....
Of all the things I have lost, I miss my mind the most.
jp
----- Original Message -----
From: "Dennis Hassell" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, May 08, 2003 3:56 AM
Subject: Re: [HP3000-L] Image schema tricks?
> IIRC the root file also maintains current internal pointers to the
> datasets, so a swap would disrupt the root and dataset relationship.
> Also, I think the item numbers are referenced both in the sets and the
> root - messing with the root would throw off these pointers. This is in
> addition to the numbers possibly being referenced in the applications.
>
> Somebody who has root file experience might know for sure - Alfredo??
>
> Dennis Hassell
> Dennis Hassell and Associates
> (941) 746-4919
> (941) 224-3981 - cell
>
>
>
> -----Original Message-----
> From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On
> Behalf Of Tracy Pierce
> Sent: Wednesday, May 07, 2003 10:57 AM
> To: [log in to unmask]
> Subject: [HP3000-L] Image schema tricks?
>
>
> I have an Image database in which the item declarations have been added
> willy-nilly, and now I'd like to sort those declarations for easier
> readability without breaking my database and without doing a reload.
>
> 1) generate a schema from the live base via adager
> 2) sort the item declaration list as desired
> 3) chgroup newbase
> file dbstext = schemafrom1)
> file dbslist = $stdlist
> run dbschema.pub.sys;parm=3
> echo create vmsdb > dbuinput
> echo exit >> dbuinput
> run dbutil.pub.sys;stdin=dbuinput
> 4) now can I safely just swap the new root file into place? (no, I
> never use numbers for either sets or items, but will this break things
> if I do so
> later?)
>
>
> Tracy Pierce
>
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