>> Again agree. If we have fixed order of columns (ORDER BY) then we should not
>> try to reorder it. Current patch follows that if I didn't a mistake.
>>
>
> This part seems to be more a misunderstanding between me and Claudio. I believe
> Claudio was referring to the column order in a GROUP BY, not ORDER BY. In which
> case we don't add any Sort, of course.
I hope so
>
> I'm still opposed to adding arbitrary handicap to prioritize the order specified
> by user, for the reasons I explained before. We should aim to make the
> heuristics/costing reliable enough to make this unnecessary.
+1
--
Teodor Sigaev E-mail: teodor@sigaev.ru
WWW: http://www.sigaev.ru/