From: Stephan Szabo <sszabo@megazone23.bigpanda.com>
To: Zhidian Du <duzhidian@hotmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: No promany key in parent table, how to use delete cascade?
Date: Thu, 7 Nov 2002 22:49:34 -0800 (PST)
Message-ID: <20021107224708.K6692-100000@megazone23.bigpanda.com> (raw)
In-Reply-To: <F1364A2DreBBsQwY6YH00000812@hotmail.com>
On Thu, 7 Nov 2002, Zhidian Du wrote:
> Dear All,
>
> I want to dreate a delete cascade in children tables. The primary key of
> parent table is oid, so when I create parent table, there is no apparetly
> key word "primary key". The problem jumps out.
>
> When I create child table using columnn constraint on delete, the SQL says:
>
> "PRIMARY KEY for referenced table "parent" not found"
>
> I do not need to specify the primary key since I am using oid. How can I
> get around this problem?
I'm not sure if 7.2 lets you make the constraint at all, but even if it
does, you need a unique index on oid and you need to specify that the
constraint is to oid (col references parent(oid))
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To: pgsql-sql@postgresql.org
Cc: sszabo@megazone23.bigpanda.com, duzhidian@hotmail.com
Subject: Re: No promany key in parent table, how to use delete cascade?
In-Reply-To: <20021107224708.K6692-100000@megazone23.bigpanda.com>
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