From: Ragnar <gnari@hive.is>
To: Andreas Joseph Krogh <andreak@officenet.no>
Cc: pgsql-sql@postgresql.org
Subject: Re: [HACKERS] lower() not working correctly...?
Date: Fri, 15 Sep 2006 10:07:05 +0000
Message-ID: <1158314825.17224.190.camel@localhost.localdomain> (raw)
In-Reply-To: <200609150952.53956.andreak@officenet.no>
References: <200609150952.53956.andreak@officenet.no>
On fös, 2006-09-15 at 09:52 +0200, Andreas Joseph Krogh wrote:
> I have the following query:
>
> select lower(firstname) || ' ' || lower(lastname) from person
>
> firstname and lastname are VARCHAR
>
> lower() returns NULL when firstname OR lastname is NULL, is this correct?
In fact, your problem has nothing to do with lower().
You probably did not expect the || operator
to return NULL when any of the operands is NULL
as seen in
select firstname || ' ' || lastname from person
so , as someone else has already mentioned,
you should use coalesce.
gnari
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To: pgsql-sql@postgresql.org
Cc: gnari@hive.is, andreak@officenet.no
Subject: Re: [HACKERS] lower() not working correctly...?
In-Reply-To: <1158314825.17224.190.camel@localhost.localdomain>
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