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From: Mark Dilger <pgsql@markdilger.com>
To: Hannu Krosing <hannu@skype.net>
Subject: Re: [SQL] Interval subtracting
Date: Wed, 01 Mar 2006 12:46:12 -0800
Message-ID: <44060814.8030604@markdilger.com> (raw)
In-Reply-To: <1141244920.3737.10.camel@localhost.localdomain>
References: <200603012018.k21KIhi22006@candle.pha.pa.us>
	<1141244920.3737.10.camel@localhost.localdomain>

Hannu Krosing wrote:
> But unfortunately '2 mons -1 days' <> '1 mons 29 days'
> 
> If I want something to happen 1 day less than two months from dome date,
> then the only way to say that consistently *is* '2 mons -1 days'.

Correct me if I am wrong, but I thought that justify_days would only be called 
if the user wanted it.  I get the following behavior in psql even after the 
patch is applied:

select '2 mons -1 days'::interval;
     interval
----------------
  2 mons -1 days


So there does not seem to be any justification going on without the user's 
permission.  Consequently, if you need '2 mons -1 days', don't call justify_days.

Am I missing something?

mark



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