Oliver Elphick writes: > I never have understood why the basic table structure changes so much > that it can't be read; just what is involved in getting the ability to > read old versions?
The problem in an extensible system such as PostgreSQL is that virtually every feature change is reflected by a change in the structure of the system catalogs. It wouldn't be such a terribly big problem in theory to make the backend handle these changes, but you'd end up with a huge bunch of if (dataVersion == 1) do this; else if (dataVersion == 2) do that; ... which would become slow and unwieldy, and would scare away developers. That would of course be a self-serving scheme, because if the development progress slowed down, you would have to update less frequently. -- Peter Eisentraut [EMAIL PROTECTED] ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9' the postmaster
