On Tue, Feb 07, 2006 at 10:55:27AM -0500, Paul Tomblin wrote: > I am putting together something that will act like a Wiki for structured > data (in this case, airport and navigation aid data like id, location, > runways, etc). I currently store the data in an SQL databasee, but only > the "current" version. I want to allow people to edit that data, but that > means being able to compare versions, roll back erroneous edits, get what > the database looked like before a particular editor came along, etc. Is > there anything written on this topic? Has anybody ever tried it before?
I would add a version column to the appropriate tables and create views that pull the most recent version of everything. Or if performance becomes an issue, keep a table with only the current versions, and a seperate table with either all older versions or just all versions. An added benefit of a version field is it's a trivial way to detect potential conflicts; if you have the edit code pass back the version it was editing, you can verify that that version is what's still in the database. -- Jim C. Nasby, Sr. Engineering Consultant [EMAIL PROTECTED] Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
