From: Paul Lambert <paul.lambert@autoledgers.com.au>
To: pgsql-sql <pgsql-sql@postgresql.org>
Subject: Quick question re foreign keys.
Date: Wed, 24 Oct 2007 10:03:01 +0800
Message-ID: <471EA7D5.9040403@autoledgers.com.au> (raw)
I have a table where one column references by foreign key a column from
another table. However, the column in this first table does not always
contain data which results in a not-null constraint violation when I
attempt an insert.
My question therefore is, is it possible to create a foreign key that is
conditional, i.e. only enforce the foreign key where the value in that
table is not null.
--
Paul Lambert
Database Administrator
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To: pgsql-sql@postgresql.org
Cc: paul.lambert@autoledgers.com.au
Subject: Re: Quick question re foreign keys.
In-Reply-To: <471EA7D5.9040403@autoledgers.com.au>
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