From: | Oliver Elphick <olly(at)lfix(dot)co(dot)uk> |
---|---|
To: | Bruno Baguette <pgsql-ml(at)baguette(dot)net> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Primary key inheritance problem |
Date: | 2004-08-29 16:34:08 |
Message-ID: | 1093797247.29613.347.camel@linda |
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Thread: | |
Lists: | pgsql-general |
On Fri, 2004-08-27 at 11:58, Bruno Baguette wrote:
> Hello,
>
> I've a strange problem with inheritance on PostgreSQL 7.4.1. It seems
> like tables don't inherits the primary key of the 'mother' table.
...
> The error I get is :
> ERROR: there is no unique constraint matching given keys for referenced
> table "child_foo"
Primary and foreign key constraints are not inherited. This is a defect
in the current system.
> What can I do to solve that problem ?
Create an index table to provide a unique key for the whole hierarchy.
Each member of the hierarchy has a foreign key reference to it na has
its own primary key on the referencing field. Use triggers to update
the index table.
--
Oliver Elphick olly(at)lfix(dot)co(dot)uk
Isle of Wight http://www.lfix.co.uk/oliver
GPG: 1024D/A54310EA 92C8 39E7 280E 3631 3F0E 1EC0 5664 7A2F A543 10EA
========================================
"Preach the word; be instant in season, out of season;
reprove, rebuke, exhort with all longsuffering and
doctrine." II Timothy 4:2
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