Date: Thu, 17 Feb 2005 09:40:13 -0700
From: Michael Fuhr <mike@fuhr.org>
To: pginfo <pginfo@t1.unisoftbg.com>
Cc: Richard_D_Levine@raytheon.com,
	Michael Glaesemann <grzm@myrealbox.com>, pgsql-sql@postgresql.org,
	pgsql-sql-owner@postgresql.org
Subject: Re: pg primary key bug?
Message-ID: <20050217164013.GA26345@winnie.fuhr.org>
References: <OFEF67063C.F61988F3-ON05256F9D.005A91D6@ftw.us.ray.com>
	<4214B466.20908@t1.unisoftbg.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <4214B466.20908@t1.unisoftbg.com>

On Thu, Feb 17, 2005 at 04:12:38PM +0100, pginfo wrote:

> 01=# select * from a_constants_str where constname='DOCPLAID' ;
> constname | fid | constvalue
> -----------+-----+------------
> DOCPLAID  |   0 | SOF_19738
> DOCPLAID  |   0 | SOF_19738
> (2 rows)

Do you have any inherited tables?  What's the result of the following
query?

SELECT tableoid::regclass, *
FROM a_constants_str
WHERE constname = 'DOCPLAID';

Inherited tables are documented to have deficiencies regarding
constraints.  Observe:

CREATE TABLE parent (
    constname   varchar(30) NOT NULL,
    fid         integer NOT NULL,
    constvalue  varchar(30),
    PRIMARY KEY (constname, fid)
);  
 
CREATE TABLE child () INHERITS (parent);

INSERT INTO parent VALUES ('DOCPLAID', 0, 'SOF_19738');

INSERT INTO parent VALUES ('DOCPLAID', 0, 'SOF_19738');
ERROR:  duplicate key violates unique constraint "parent_pkey"

INSERT INTO child VALUES ('DOCPLAID', 0, 'SOF_19738');

SELECT tableoid::regclass, * FROM parent;
 tableoid | constname | fid | constvalue 
----------+-----------+-----+------------
 parent   | DOCPLAID  |   0 | SOF_19738
 child    | DOCPLAID  |   0 | SOF_19738
(2 rows)

-- 
Michael Fuhr
http://www.fuhr.org/~mfuhr/