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Re: tzcode update

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com>
Cc: pgsql-patches(at)postgresql(dot)org
Subject: Re: tzcode update
Date: 2008-02-13 15:01:10
Message-ID: 14459.1202914870@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-patches
"Heikki Linnakangas" <heikki(at)enterprisedb(dot)com> writes:
> Looking closer, I don't understand how that change was supposed to do 
> anything.

The point of that patch is to avoid an off-by-one result for years BC.
The direction of rounding in integer division with a negative numerator
is undefined in C (or at least used to be --- did C99 tighten this up?).

			regards, tom lane

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