From: Stephan Szabo <sszabo@megazone23.bigpanda.com>
To: Josh Berkus <josh@agliodbs.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: BETWEEN bug?
Date: Wed, 10 Jul 2002 13:10:06 -0700 (PDT)
Message-ID: <20020710125904.O53979-100000@megazone23.bigpanda.com> (raw)
In-Reply-To: <200207101235.53848.josh@agliodbs.com>
On Wed, 10 Jul 2002, Josh Berkus wrote:
> Folks,
>
> Why does BETWEEN only work for ascending criteria? For example:
>
> jwnet=> select '2002-06-07'::TIMESTAMP BETWEEN '2002-06-29'::TIMESTAMP and
> '2002-06-01'::TIMESTAMP;
> ?column?
> ----------
> f
> (1 row)
>
> jwnet=> select '2002-06-07'::TIMESTAMP BETWEEN '2002-06-01'::TIMESTAMP and
> '2002-06-29'::TIMESTAMP;
> ?column?
> ----------
> t
> (1 row)
>
> The above behaviour does not seem logical; is this a SQL spec thing, or a bug?
Spec thing.
In SQL92,
"X BETWEEN Y AND Z" is equivalent to "X>=Y AND X<=Z".
In SQL99, there's BETWEEN SYMMETRIC and ASYMMETRIC, but ASYMMETRIC is the
default which is the same as the SQL92 version afaics. Symmetric is an
optional feature that I think Christopher's been working on.
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To: pgsql-sql@postgresql.org
Cc: sszabo@megazone23.bigpanda.com, josh@agliodbs.com
Subject: Re: BETWEEN bug?
In-Reply-To: <20020710125904.O53979-100000@megazone23.bigpanda.com>
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