Re: [HACKERS] Re: [GENERAL] Proposed Changes to PostgreSQL

Bruce Momjian wrote:
>
> > Bruce Momjian wrote:
> >
> > > So the field is created on the fly to show what table it came from.
> > > Seems like a good idea, though implementing another usually-invisible
> > > column will be tough.
> >
> > What problems do you forsee?
>
> Well, it is usually pretty strange to carry around a column that doesn't
> exist through all the code and finally contruct it at the end.  I would
> suspect something in the rewrite system could do that pretty easily,
> though.  That is the direction I would go with that.
>

Oracle has a ROWNR (IIRC) pseudo-column that is added in th every end of
query and is a convienient way to put numbers on report rows (among other
things).

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Hannu