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From: sakkinen@jyu.fi (Markku Sakkinen)
Newsgroups: comp.lang.misc,comp.object
Subject: Re: CHALLENGE: heterogeneous collections
Message-ID: <1991Apr5.052433.5271@jyu.fi>
Date: 5 Apr 91 05:24:33 GMT
References: <CIMSHOP!DAVIDM.91Apr1224716@uunet.UU.NET> <1991Apr3.211414.25628@bony1.bony.com> <ERICCO.91Apr4095619@sdaf1.ssl.berkeley.edu>
Distribution: comp
Organization: University of Jyvaskyla, Finland
Lines: 22

In article <ERICCO.91Apr4095619@sdaf1.ssl.berkeley.edu> ericco@ssl.berkeley.edu (Eric C. Olson) writes:
> ...
>I read an interesting paper that included a discussion of
>heterogeneous objects in an object-oriented database.
>
>The basic idea was to resolve the class heirarchy as late as
>possible, but during query semantic checking.  That is, given
>a heterogeneous set of objects to work on, is it legal to
>apply a particular method on all of the objects?
> ...

You probably mean "Type Consistency of Queries in an Object-Oriented
Database System" by Straube and Ozsu (O"zsu), OOPSLA/ECOOP'90.

Reply-To: sakkinen@jytko.jyu.fi (Markku Sakkinen)
Markku Sakkinen
Department of Computer Science and Information Systems
University of Jyvaskyla (a's with umlauts)
PL 35
SF-40351 Jyvaskyla (umlauts again)
Finland
          SAKKINEN@FINJYU.bitnet (alternative network address)