Re: Imprecision of DAYS_PER_MONTH

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, "Marc G(dot) Fournier" <scrappy(at)postgresql(dot)org>
Subject: Re: Imprecision of DAYS_PER_MONTH
Date: 2005-07-21 18:06:22
Message-ID: 200507211806.j6LI6MD23609@candle.pha.pa.us
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Tom Lane wrote:
> Another problem with this patch is the search-and-replace substitution
> of "SECS_PER_MINUTE" for "60", when in point of fact there are two
> different meanings of "60" in this context. For instance, this
> code has no problem:
>
> ! int Log_RotationAge = 24 * 60;
>
> but this code looks like it has a units error:
>
> ! int Log_RotationAge = HOURS_PER_DAY * SECS_PER_MINUTE;
>
> You need a "MINS_PER_HOUR" or some such if you don't want people
> having to look twice at the code.
>
> BTW, if you actually wanted to improve readability, defining a
> SECS_PER_YEAR value and replacing the various occurrences of
> "36525 * 864" with it would help.

Good idea, both done.

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
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