Re: pgsql: Document that age() adds days, then full months.

Tom Lane wrote:
> momjian(at)postgresql(dot)org (Bruce Momjian) writes:
> > Document that age() adds days, then full months.
>
> AFAICT, this documentation "improvement" is outright wrong.

I am now thinking no documentation paragraph is even needed. We have to
use the number of months in the earlier date or simple computations
would not work like:

test=> select age('2004-05-29', '2004-06-28');
age
----------
-30 days
(1 row)

The end of the earlier month is part of the interval between the two
timestamps, while the end of the later month is not. Of course with a
multi-months span there are more chances for variance, but we certainly
should give the right answer for an interval < 1 month. I can just add
a C comment.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://www.enterprisedb.com

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