Re: Inheritance

From: 71022(dot)733(at)compuserve(dot)com (Peter Gulutzan)
To: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Inheritance
Date: 2002-08-28 13:23:46
Message-ID: b50c93bd.0208280523.21e73fd0@posting.google.com
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The August draft of the SQL:200n standard (9075-2 Foundation) says in
Section 4.17.2: "Every table constraint specified for base table T is
implicitly a constraint on every subtable of T, by virtue of the fact
that every row in a subtable is considered to have a corresponding
superrow in every one of its supertables."

Peter Gulutzan
Co-Author, SQL-99 Complete, Really
Co-Author, SQL Performance Tuning

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