On Wed, 8 Oct 1997, Keven Miller wrote:

> Sorry for the slow response. I find that the UNLOG program was a bit specific for
> my (previous) location. I am attempting to ajust the FTN code for more general use.
> Then I will send it to you.
>
> ( I found that I didn't remember how to run it. And was unsuccessfull in reading a
> test logfile).
I discovered that my first version was able to UNDELETE detail records. I
am working on handling of master records, UNPUT and UNUPDATE opertaions.
The program must be able to read the logfile backwrds, too, if I want to
undo complicate transactions.
>
I have some trivia questions:
1) How does a database receive a dbase identifier? The data base
identifier is number returned by
the DBOPEN. It seems to be constants for a database. Is there a secret
place in the system directory where a database identifier -> database
name.proup.account table is stored?

1a) When does the MPE/V system change the database identifier of a given
database? I case of coldstarst, restructuring, reload, ...?
2) Can I determine from a CHANGELOG record the logical device number of
the log file?

Regards
                                             Frank

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