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From: Adrian Klaver <adrian.klaver@gmail.com>
Reply-To: adrian.klaver@gmail.com
To: pgsql-sql@postgresql.org
Subject: Re: insert from a select
Date: Wed, 24 Nov 2010 16:25:15 -0800
User-Agent: KMail/1.9.10
Cc: John Fabiani <johnf@jfcomputer.com>
References: <201011241607.43378.johnf@jfcomputer.com>
In-Reply-To: <201011241607.43378.johnf@jfcomputer.com>
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Message-Id: <201011241625.15949.adrian.klaver@gmail.com>

On Wednesday 24 November 2010 4:07:43 pm John Fabiani wrote:
> Hi,
>  I have a strange issue that is mostly likely me not understanding
> something. I always thought that an insert statement would accept any
> select statement. I'm guessing I am wrong.
>
> I have created a temporary table ("tempclass") that is exact match to an
> existing table ('esclass').
>
> When I attempt to do the following
> insert into tempclass Select cl.pkid, cl.depart, cl.sessionid, cl.instrid,
> cl.classseq,(select facility from esloc where esloc.pkid = cl.locationid)
> as facility, cl.schedule from esclass cl where cl.pkid in (14507,14508)
>
> I get the following error:
>
> ERROR:  column "schedule" is of type date but expression is of type
> character varying
> LINE 1: ... cl.depart, cl.sessionid, cl.instrid, cl.classseq,(select fa...
>                                                              ^
> HINT:  You will need to rewrite or cast the expression.
>
> The error makes no sense to me.  But most important if I just run the
> select statement it works perfectly.
>
> Like I said the table "tempclass" (a temporary) is a dup of table "esclass"
> so none of it makes sense.  Of course I did say I'm missing something.
>
> So why isn't the select statement working with the insert?

Looks like an off by one situation. See error detail below:

LINE 1: ... cl.depart, cl.sessionid, cl.instrid, cl.classseq,(select fa..
                                                             ^

Looks like the result of the 'select facility.." is being inserted into the 
schedule column. 

>
> Johnf


-- 
Adrian Klaver
adrian.klaver@gmail.com