"Joachim Achtzehnter" <[EMAIL PROTECTED]> wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Today, in a message to boost, Vladimir Prus wrote: > > > > Bohdan wrote: > > > > > > serialization: Object <-> Relational tuple (object-relational mapping). > > > > Wouldn't there be a problem with converting object with variable size? > > How can you store vector<int> in a relational database? I don't see an > > easy way. > > You are raising a good point. What this ultimately boils down to is the > realization that mapping Object to Tuple is problematic. > > This doesn't mean that the relational model is a bad choice as a target > model for a persistent store. On the contrary, it is probably the best > model to use for this purpose. The problem is only the assumption that > Object (or better: type) maps always to Tuple. Recent developments in > relational theory suggest that it is the Domain concept ("column type") > that should be seen as the closest equivalent to "Object Type". Refer to > recent writings by Chris Date (books and also papers, the latter > accessible on the Web) for the theory behind this, and why the Object <=> > Tuple identification is a mistake.
Sure, i know about it. The main problem is inheritance and pointer members, but i have some ideas how to deal with them. My first letter intention was just to describe idea. regards, bohdan _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
