is there any defect when use null column in postgresql?

From: leopay <leopay(at)gmail(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: is there any defect when use null column in postgresql?
Date: 2009-03-16 03:00:39
Message-ID: e9369e430903152000p3c4fc058rae4d35c69ea75692@mail.gmail.com
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I wanna if there is any defact when use null column in pg,
e.g. performance issue

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