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- Newsgroups: comp.databases.informix
- Path: sparky!uunet!metter!chris
- From: chris@metter.fmpmis.metter.com (Chris Mathes)
- Subject: tracking data changes (a request for advice/information)
- Message-ID: <1992Nov17.001640.527@metter.fmpmis.metter.com>
- Organization: Metters Industries, Inc.
- Distribution: usa
- Date: Tue, 17 Nov 1992 00:16:40 GMT
- Lines: 43
-
- I need the ability to track any changes to a large OnLine database, to the
- table/row/column level*, without having to constantly scan all of the tables,
- and without building any special abilities into the applications doing the
- adding/deleteing/updating.
-
- The former is no good because:
-
- 1) It would use up too many resources, and
- 2) It wouldn't give me the changes in the order they happened (fairly important)
-
- The latter is no good because:
-
- 1) Too much existing code would have to be changed, and
- 2) doing batch adds/updates/deletes with isql would screw things up
-
- The most obvious solution I can think of is having transaction logging turned
- on, and monitoring the logical log. I guess my questions are:
-
- 1) Is this the best way to do what I want?
- 2) How would one monitor the logical log if one wanted to?
- 2a) Will it be extremely painful to get the information I want?
- 2b) Are there any library functions available for looking at logical logs, or
- will I have to parse tblog output?
-
- You get the idea.
-
- Oh, the system in question is an HP something-or-other (near top of the line)
- running the most up to date versions of HP-UX and INFORMIX OnLine. If you
- guessed that the machine isn't here yet, you are right, although I do have all
- of the INFORMIX manuals. I need to get a head-start on this project, but I
- don't have a machine to play with to see if I am headed in the right direction,
- so any suggestions or pointers will be very much appreciated.
-
- Thanks,
-
- Chris
-
- *I don't need to know before and after values, just what column(s) changed, and
- what their current values are.
- --
- Chris Mathes, Metters Industries, Inc. UUCP: {..!}uunet!metter!chris
- Tel:(703)418-0323 INET: chris@metter.fmpmis.metter.com
- "The Tao of Programming flows far away and returns on the wind of morning."-TToP
-