From: Michael Fuhr <mike@fuhr.org>
To: Ami Ganguli <ami.ganguli@gmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: using a selected row as a function parameter
Date: Fri, 3 Jun 2005 09:23:28 -0600
Message-ID: <20050603152328.GA66944@winnie.fuhr.org> (raw)
In-Reply-To: <87eeecff0506030744e04eb25@mail.gmail.com>
References: <87eeecff0506030744e04eb25@mail.gmail.com>
On Fri, Jun 03, 2005 at 05:44:59PM +0300, Ami Ganguli wrote:
>
> SELECT queue.apply_routing_rule(
> (SELECT * from queue.messages WHERE id = 1),
> (SELECT * from queue.routing_rules WHERE id = 1)
> );
>
> I get an error message along the lines of "sub-query must return a
> single value".
The error I get is "subquery must return only one column". Queries
like the following should work in 8.0.x:
SELECT queue.apply_routing_rule(m, r)
FROM (SELECT * FROM queue.messages WHERE id = 1) AS m,
(SELECT * FROM queue.routing_rules WHERE id = 1) AS r;
SELECT queue.apply_routing_rule(m, r)
FROM queue.messages AS m,
queue.routing_rules AS r
WHERE m.id = 1
AND r.id = 1;
--
Michael Fuhr
http://www.fuhr.org/~mfuhr/
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To: pgsql-sql@postgresql.org
Cc: mike@fuhr.org, ami.ganguli@gmail.com
Subject: Re: using a selected row as a function parameter
In-Reply-To: <20050603152328.GA66944@winnie.fuhr.org>
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