Re: AW: AW: [HACKERS] SELECT ... AS ... names in WHERE/GROUP BY/HAVIN G

Zeugswetter Andreas SB <ZeugswetterA@wien.spardat.at> writes:
> Informix and DB/2 allow column numbering in the group by clause.

What do they do with
SELECT foo AS bar FROM table GROUP BY bar

?

What do they do if bar is the real name of another column in the table?
        regards, tom lane