hansw@kub.nl (Hans Weigand) (01/12/90)
Does anybody know about efforts to write a compiler that maps an object-oriented language (in particular, Objective C) to some relational database language (e.g, SYBASE SQL/DML). All pointers are welcome. Please respond by email. Hans Weigand (hansw@kub.nl)
sakkinen@tukki.jyu.fi (Markku Sakkinen) (01/14/90)
In article <684@kubix.kub.nl> hansw@kub.nl (Hans Weigand) writes:
-
-Does anybody know about efforts to write a compiler that maps an
-object-oriented language (in particular, Objective C) to some
-relational database language (e.g, SYBASE SQL/DML). All pointers
-are welcome.
Sounds unfeasible. For instance, I suppose relational database languages
are just too weak (not Turing-complete).
Also, their "perspective" is so very different from that of OO languages.
Markku Sakkinen
Department of Computer Science
University of Jyvaskyla (a's with umlauts)
Seminaarinkatu 15
SF-40100 Jyvaskyla (umlauts again)
Finlanddavidm@uunet.UU.NET (David S. Masterson) (01/16/90)
In article <2687@tukki.jyu.fi> sakkinen@tukki.jyu.fi (Markku Sakkinen) writes: In article <684@kubix.kub.nl> hansw@kub.nl (Hans Weigand) writes: - -Does anybody know about efforts to write a compiler that maps an -object-oriented language (in particular, Objective C) to some -relational database language (e.g, SYBASE SQL/DML). All pointers -are welcome. Sounds unfeasible. For instance, I suppose relational database languages are just too weak (not Turing-complete). Also, their "perspective" is so very different from that of OO languages. I think that depends on the definition of "object" that you choose to model via the database system. True, relational database systems can't model everything that OO languages (like Objective-C) can. Relational database languages are built on the principal of set manipulation whereas OO languages have more general capabilities. However, a relational database system (especially one with enbedded procedures like Sybase) should be able to provide significant capabilities when talking about persistent objects. Therefore, one might choose a proper subset of the OO language to model with a relational language, but not the whole thing. -- =================================================================== David Masterson Consilium, Inc. uunet!cimshop!davidm Mt. View, CA 94043 =================================================================== "If someone thinks they know what I said, then I didn't say it!"