Re: Unclear error message

From: Michael Paquier <michael(at)paquier(dot)xyz>
To: Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Unclear error message
Date: 2018-09-21 05:17:07
Message-ID: 20180921051707.GK1338@paquier.xyz
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On Thu, Sep 20, 2018 at 09:45:09PM +0200, Laurenz Albe wrote:
> That message is wrong, because "rel" and not "pkrel" is the partitioned table.
> I think it should be
>
> ereport(ERROR,
> (errcode(ERRCODE_WRONG_OBJECT_TYPE),
> errmsg("foreign key cannot be defined on ONLY \"%s\" for a partitioned table",
> Relatio
> nGetRelationName(rel))));

Hmm... There are no test cases for this error message, nor for the one
below "cannot add NOT VALID foreign key to relation foo", which is a bad
idea.

The referenced relation has to be RELKIND_RELATION. Here is another
idea of error message:
cannot use ONLY on partitioned table "foo" with foreign key
--
Michael

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