• Subject: RE: PF File Definition questions...
  • From: Buck Calabro <mcalabro@xxxxxxxxxxxx>
  • Date: Fri, 15 Oct 1999 12:46:21 -0400

My experience is that you can delete/recreate the PF or LF and the record
format level ID will remain the same.  The "level check signature" isn't
based on date/time (like the file level ID), but on the number, type and
size of the fields defined within the record.  You can make lots of changes
to a field (TEXT, COLHDG, EDTCDE, DFT come to mind) without creating level
check problems.  It appears that the level check signature is based on the
way the I/O buffer looks to the HLL program (which includes CL.)

Buck Calabro

> -----Original Message-----
> From: Rob Berendt 
> Sent: Friday, October 15, 1999 11:33 AM
> To:   MIDRANGE-L@midrange.com
> Subject:      RE: PF File Definition questions...
> If I delete and rebuild a logical will it have the same file level 
> id or do I have to recompile all affected programs?
> cbrown@che400.state.sc.us on 10/15/99 10:27:55 AM
> Please respond to MIDRANGE-L@midrange.com@Internet
> To:   MIDRANGE-L@midrange.com@Internet
> cc:    
> Fax to:       
> Subject:      RE: PF File Definition questions...
> One of the reasons that I don't place a key on a physical file has to do
> with potential damage of an access path.  You can tell me whether this
> logic
> is still correct.  If the access path is damaged and the physical file is
> keyed, then the file would have to rebuilt from a restore.  If the
> physical
> file is not keyed, then the damaged the logical can be deleted and
> recreated
> without a restore.  Camille Brown  
| This is the Midrange System Mailing List!
| To submit a new message, send your mail to MIDRANGE-L@midrange.com.
| To subscribe to this list send email to MIDRANGE-L-SUB@midrange.com.
| To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: david@midrange.com

As an Amazon Associate we earn from qualifying purchases.

This thread ...

Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2022 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.