tup_returned/ tup_fetched

From: Sebastian Böhm <seb(at)exse(dot)net>
To: pgsql-general(at)postgresql(dot)org
Subject: tup_returned/ tup_fetched
Date: 2008-12-15 03:02:02
Message-ID: 8912705F-917F-4A67-88FF-E7FAFF52823F@exse.net
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Hi,

one question:

what actually is tup_returned and tup_fetched ?

read from disc before scans and before aggregate ?

thanks
sebastian

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