From: Terry Fielder <terry@ashtonwoodshomes.com>
To: Havasvölgyi Ottó <h.otto@freemail.hu>
Cc: pgsql-sql@postgresql.org
Subject: Re: NULL in IN clause
Date: Wed, 19 Oct 2005 16:41:48 -0400
Message-ID: <4356AF8C.80709@ashtonwoodshomes.com> (raw)
In-Reply-To: <001a01c5d4ea$243a1830$6400a8c0@OTTO>
References: <00cc01c5d00b$3a67dc70$1102a8c0@dream>
<1129681803.15546.21.camel@state.g2switchworks.com>
<001a01c5d4ea$243a1830$6400a8c0@OTTO>
Havasvölgyi Ottó wrote:
> Hi,
>
> I have just run this command on 8.0.4 :
>
> SELECT 'foo' WHERE 0 NOT IN (NULL, 1);
0 <> NULL (Indeed nothing equals NULL, other then sometimes NULL itself)
0 <> 1
Therefore, the statement: 0 NOT IN (NULL, 1)
Should always equate to false.
Therefore No rows returned. Ever.
Terry
>
> And it resulted is zero rows.
> Without NULL it is OK.
> Is this a bug, or the standard has such a rule?
>
> Best Regards,
> Otto
>
>
>
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>
--
Terry Fielder
terry@greatgulfhomes.com
Associate Director Software Development and Deployment
Great Gulf Homes / Ashton Woods Homes
Fax: (416) 441-9085
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To: pgsql-sql@postgresql.org
Cc: terry@ashtonwoodshomes.com, h.otto@freemail.hu
Subject: Re: NULL in IN clause
In-Reply-To: <4356AF8C.80709@ashtonwoodshomes.com>
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