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: teo...@sigaev.ru
WWW: http://www.sigaev.ru/
