Re: OO's best feature survey results
Date: Mon, 3 Nov 2003 12:55:40 -0500
Message-ID: <2fKdnRKhP48iCzuiRVn-sQ_at_golden.net>
"JXStern" <JXSternChangeX2R_at_gte.net> wrote in message
news:5mucqvc1p6gu8niml2ig42qvnailoc2esj_at_4ax.com...
> On Mon, 3 Nov 2003 07:46:01 -0500, "Bob Badour" <bbadour_at_golden.net>
> wrote:
> >Regardless, consider your original assertion that the relational model
> >requires all operations to return booleans corrected.
>
> Don't relational operations return ... relations?
Relation operations return relations just as string operations return strings and boolean operations return booleans. The restriction operation uses a boolean expression and a relation to return a relation, and the extension operation uses a relation and any number of other operations on any number of other data types to return a relation.
Were you trying to make some sort of point? Received on Mon Nov 03 2003 - 18:55:40 CET