Re: [pgsql-advocacy] SQL Spec Compliance Questions

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От Peter Eisentraut
Тема Re: [pgsql-advocacy] SQL Spec Compliance Questions
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Msg-id 200404040124.42465.peter_e@gmx.net
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Ответ на Re: [pgsql-advocacy] SQL Spec Compliance Questions  (Josh Berkus <josh@agliodbs.com>)
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Josh Berkus wrote:
> > 4.16.2 Referenceable tables, subtables, and supertables
> >         A table BT whose row type is derived from a structured type
> > ST is called a typed table. Only a base table or a view can be a
> > typed table. A typed table has columns corresponding, in name and
> > declared type, to every attribute of ST and one other column REFC
> > that is the self-referencing column of BT; let REFCN be the
> >
> > I really don't quite understand this, but I don't think we have it
> > ;-)
>
> Ye Gods and Little Fishes!!
>
> Was the SQL99 Committee smoking crack, or what?    What the heck is
> that *for*?

Object/relational mapping?


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