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Re: Bug #702: NULLs order by bug in 7.2.1

From: Stephan Szabo <sszabo(at)megazone23(dot)bigpanda(dot)com>
To: <johnl(at)emrx(dot)com>, <pgsql-bugs(at)postgresql(dot)org>
Subject: Re: Bug #702: NULLs order by bug in 7.2.1
Date: 2002-07-03 06:11:17
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-bugs
On Tue, 2 Jul 2002 pgsql-bugs(at)postgresql(dot)org wrote:

> John Liu (johnl(at)emrx(dot)com) reports a bug with a severity of 2
> The lower the number the more severe it is.
> Short Description
> NULLs order by  bug in 7.2.1
> Long Description
> select date_fld from my_table order by date_fld desc;
> The above query put NULLs on top of normal values
> in stead of bottom, this is not the case in 7.1.3.

I think this was the bug fix.  I read the applicable
section of the spec as saying that NULLs are treated
as either all greater or all less than non-null values
for order by, so if the nulls come at the end of an asc
order by, they come at the front of the desc one.

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