From: Tom Lane <tgl@sss.pgh.pa.us>
To: pgsql-hackers@postgresql.org
Subject: Re: [SQL] Interval subtracting
Date: Wed, 01 Mar 2006 19:37:37 -0500
Message-ID: <17752.1141259857@sss.pgh.pa.us> (raw)
In-Reply-To: <44063632.20505@markdilger.com>
References: <200603012326.k21NQOv08610@candle.pha.pa.us>
<4406331A.6080307@markdilger.com>
<17317.1141257505@sss.pgh.pa.us>
<44063632.20505@markdilger.com>
Mark Dilger <pgsql@markdilger.com> writes:
> Tom Lane wrote:
>> If so, one function or the other is cheating.
> That depends what you mean by cheating. The justify_hours function
> looks to see what answer justify_days would give, but does not
> actually change the data. I described this all earlier and I still
> don't see why there is anything wrong with it.
The problem is that you can't determine "what answer justify_days would
give" without using the assumption "1 month == 30 days", which is an
assumption that justify_hours must not depend on.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, pgsql-hackers@postgresql.org
Subject: Re: [SQL] Interval subtracting
In-Reply-To: <17752.1141259857@sss.pgh.pa.us>
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