this is an entirely anecdotal remark, not really relevant, but one of the original inspirations for elephant was a database system that was used in-house at a company i was at with andrew blumberg and other lisp hackers. i was doing java crap and was a complete lisp neophyte, and was amazed to see "change-class" in action. that was a disrupting experience. also, i had been worried about the object-relational impedance mismatch for a while. BDB-backed elephant was a way to get persistence without a table structure, and hopefully reap some benefits in flexibility. the original target applications were web stuff and a mother-of-all-email-clients which never materialized.
i still think writing a ZODB-like backend would be a good idea, especially given sleepycat's licensing issues. take care, B On 4/11/07, Pierre THIERRY <[EMAIL PROTECTED]> wrote:
Scribit Robert L. Read dies 09/04/2007 hora 18:43: > However, if someone else can go, I am also happy to help or to > co-author a paper with them. It occurred to me that the combination of persistence and the MOP goes far beyond anything else I know in terms of flexibility WRT to the data model. That is, even a powerful macro system to build code that accesses a DB sets in stone the data model at compile-time. But a persistence library based on the MOP can bring to stored data the dynamic nature of CLOS, and you could completely change how data is organized, while the application runs, without having to build a migration tool, even if this process is automated (which is hard, I suppose), like cl-migrations. Like Erlang, Common Lisp enables a system to remain live while being updated at the code level. An Elephant-like persisence library enables a system to remain live while being updated at the data model level also, almost for free. I think this could easily make a short paper, maybe even a long one. I will try to write a first draft of it, and probably ask for help at some point. Quickly, Pierre -- [EMAIL PROTECTED] OpenPGP 0xD9D50D8A -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGHRogxe13INnVDYoRAvePAKDqISbcjuxdCxcG+v5sgvkrK9pdqgCgiOs1 MCQO7iuqMvsotPM1iQA8ZoU= =ez7O -----END PGP SIGNATURE----- _______________________________________________ elephant-devel site list elephant-devel@common-lisp.net http://common-lisp.net/mailman/listinfo/elephant-devel
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