primary key in table hierarchy

From: David Garamond <lists(at)zara(dot)6(dot)isreserved(dot)com>
To: pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: primary key in table hierarchy
Date: 2004-03-25 13:52:02
Message-ID: 4062E402.4080609@zara.6.isreserved.com
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Is it possible now to have PK or unique key constraint accross the table
hierarchy (i.e. given parent > child > grandchild, if record with PK=1
is defined in child; PK=1 is forbidden in parent or grandchild).

--
dave

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