Re: [HACKERS] 6.5 TODO list

Bruce Momjian wrote:

> > > GROUP BY can reference columns not in target list
> >
> > What's wrong with that?
>
> Is that not a problem. What possible use would GROUP BY on columns not
> in target list be of use. Maybe it is. I remember someone asking for
> something like this. I will remove the item unless someone complains.
> I thought you were the one complaining about it.

This can happen if the GROUP BY clause is coming from a view,
but the grouping columns of the view aren't in the
targetlist.

Usually the view's grouping is required because of use of
aggregates in the view, so omitting them isn't a good idea.

I'm actually testing what happens if I use junk TLE's for
rule generated GROUP BY entries...

Jan

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