Re: OO's best feature survey results

From: Alfredo Novoa (alfredo_at_ncs.es)
Date: 11/02/03 

Date: 2 Nov 2003 04:07:13 -0800

JXStern <JXSternChangeX2R@gte.net> wrote in message news:<sdk7qvovdmnqb1js8le7q6ikkbgd1r1c0q@4ax.com>...
 
> They've been cataloged numerous times, heck any serious book on
> relational should list them. Well let me see ... heck, it's early and
> I'm lazy, and this one old book by Date only mentions the "parts
> explosion" (hierarchical bill of materials) shortcoming, the other
> classic areas are temporal and geometric/spatial.

They are not problems for the modern interpretation of The Relational
Model.

You should upgrade your old references.

> Oracle added,
> what's it called, that parent-of operator, to address the BOM issue,
> other extensions have been added to address time-series temporal data,
> full support for temporal and spatial datatypes have been proposed
> many times.

They are extensions to the languages, but not to The Relational Model.
The RM allows complex types, interval types, recursive operators,
transitive closure, etc.

> I'm not sure what's in any new SQL standards, ... nor
> what the heck the status of any new SQL standards are anyway.

SQL never was relational and now it is less relational than ever.

Alfredo