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the difference between OLD.col and $_TD{old}{col}

From: Jignesh Shah <jignesh(dot)shah1980(at)gmail(dot)com>
To: postgresql novice <pgsql-novice(at)postgresql(dot)org>
Subject: the difference between OLD.col and $_TD{old}{col}
Date: 2009-09-17 11:49:59
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Lists: pgsql-novice

Could anyone please tell me in perl trigger, what is the difference between
OLD."col" or NEW."col"  and $_TD{old}{col} or $_TD{new}{col} values.


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