Modfying source code to read tuples before and after UPDATE...how to?

From: rmd22 <rohit(dot)dhamane(at)gmail(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: Modfying source code to read tuples before and after UPDATE...how to?
Date: 2010-11-05 10:36:43
Message-ID: 1288953403211-3251612.post@n5.nabble.com
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Hello there,

I am a total novice to Postgresql, but very much interested in learning how
it works.

I have to modify the source code of Postgresql-9.0.1 such that whenever I
run an UPDATE command it should print out the old and new tuples. Since I am
a beginner I would appreciate it a lot if anyone of you out there could
point me in right direction. Which files will I need to modify to get the
desired results?

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