I'm looking for a good datalog implementation as a possible replacement for the classic SQL-based databases. I have a personal dislike of SQL, mostly because I consider logic queries (prolog/datalog-like) to be more natural and vastly more expressive. So whenever I'm considering the use of a database in my projects I keep looking for something like CodeQuest.
As for projects I'm interested in, yes these do include querying code (and then mostly Cobol, as you may know; I'll make that another feature request for Semmle). But, as I said above, something like CQ comes to mind whenever I'm thinking of using a database. So to me it has appeal way beyond querying code...
I was wondering, if CodeQuest is no longer being maintained, and as Semmle shares no code with it, would you consider making it something like "abandonware", and just release it into the public domain ? This way it won't be lost, and it may start a second life. Though I do understand that this may be a risk to your business model. Perhaps if enough people are interested in a datalog engine you might even consider commercialising it, and releasing it as a secondary product of your firm. Either way, I would be a happy client.
