Detach GROUP BY items and result

[kit-ty-kate]

This issue is both a request and a question.
First the question: Why the items contained in the GROUP BY block is also returned in the result.
For example the following example will return both res and value:

<< group {res = sum[t.value]} by {t.value} | t in $table$ >>

So, let's imagine value is something big to send and we don't need it, then we will have a substantial performance lose.

Is it something possible ? Maybe we can have a extra operator to say this is something to not add to the result ?

[gasche]

When we designed group by, it simply seemed more expressive to do it that way. Do you have a realistic use-case where the grouped-over value is too large to be transmitted? In this case I guess << {foo.res} | foo in $grouped_stuff$ >> should do the job.

[kit-ty-kate]

Ok. Oh yes, I though about that too. An other use-case for subqueries ! :)