From: | Oliver Elphick <olly(at)lfix(dot)co(dot)uk> |
---|---|
To: | Samuel Sieb <samuel(at)sieb(dot)net> |
Cc: | PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org> |
Subject: | Re: UNIQUE not unique with inheritance (workaround?) |
Date: | 2003-02-08 22:12:01 |
Message-ID: | 1044742320.25462.58.camel@linda.lfix.co.uk |
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Thread: | |
Lists: | pgsql-hackers |
On Sat, 2003-02-08 at 19:34, Samuel Sieb wrote:
> Is there any workaround for this problem? I'm getting involved in a
> project where inheritance is an incredibly useful feature, but the
> non-unique issue could be a serious stumbling block. Is there any way
> to work around it with a trigger or something?
Give each table in the hierarchy a foreign key reference to another
table which holds a unique list of the primary keys and a column that
says which table they are in. Use triggers to update this other table
and to prevent duplications in the hierarchy.
.
--
Oliver Elphick Oliver(dot)Elphick(at)lfix(dot)co(dot)uk
Isle of Wight, UK http://www.lfix.co.uk/oliver
GPG: 1024D/3E1D0C1C: CA12 09E0 E8D5 8870 5839 932A 614D 4C34 3E1D 0C1C
========================================
"But the LORD is in his holy temple; let all the earth
keep silence before him." Habakkuk 2:20
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