Re: [HACKERS] [QUESTIONS] ORDER BY and nulls (fwd)
Vadim B. Mikheev <vadim@sable.krasnoyarsk.su>
From: "Vadim B. Mikheev" <vadim@sable.krasnoyarsk.su>
To: Bruce Momjian <maillist@candle.pha.pa.us>
Cc: PostgreSQL-development <hackers@postgreSQL.org>
Date: 1998-01-12T03:06:27Z
Lists: pgsql-hackers
Bruce Momjian wrote: > > Is this fixed yet? > > Forwarded message: > > I seem to recall that someone here said that because of the way comparisons > > are done, in an ORDER-BY query, the NULLs will always come up last. > > > > It seems to have another effect, too: if I do a SELECT ... ORDER BY > > col1,col2 - and the col1 attribute has nulls, the rows with the nulls don't > > get sorted at all. > > > > Apparently, this is because the rows which have NULL in the col1 attribute > > are not considered to have an equal value in col1, which is the requirement > > for sorting on col2 - or am I missing something here? I hope to fix this after Feb 1 (seems easy to do). Vadim