How to know if update is from a foreign key cascade in plperl?

From: Nick <nboutelier(at)gmail(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: How to know if update is from a foreign key cascade in plperl?
Date: 2012-01-25 00:45:14
Message-ID: dbaed694-2b8d-4502-b06b-bd03895b8423@c21g2000yqi.googlegroups.com
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Is it possible (in a plperl function) to know if an update is from a
foreign key cascade, rather than just a user submitted update
statement?

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