From: | "Qingqing Zhou" <zhouqq(at)cs(dot)toronto(dot)edu> |
---|---|
To: | pgsql-bugs(at)postgresql(dot)org |
Subject: | Re: Is this a bug???? |
Date: | 2005-12-04 23:10:41 |
Message-ID: | dmvsvm$1v13$1@news.hub.org |
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Lists: | pgsql-bugs |
"Joost Kraaijeveld" <J(dot)Kraaijeveld(at)Askesis(dot)nl> wrote
>
> select objectid,defaulttermsofpayment from prototype.customers
> where
> objectid = '336A0451-D9E8-7C11-6333-C17DF18E8979'
>
> I get the following answer:
>
> "336A0451-D9E8-7C11-6333-C17DF18E8979";"null"
>
test=# create table m (c1 char(10), c2 char(10));
CREATE TABLE
test=# insert into m values('hello', null);
INSERT 0 1
test=# select * from m where c1 = 'hello';
c1 | c2
------------+----
hello |
(1 row)
test=# select * from m where c2 is null;
c1 | c2
------------+----
hello |
(1 row)
Notice if an column is null, then nothing is shown. So the strange thing is
how you get "null"?
Regards,
Qingqing
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