| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Karel Zak <zakkr(at)zf(dot)jcu(dot)cz> |
| Cc: | Dann Corbit <DCorbit(at)connx(dot)com>, Kurt Roeckx <Q(at)ping(dot)be>, PostgreSQL-patches <pgsql-patches(at)postgresql(dot)org> |
| Subject: | Re: [HACKERS] Dates BC. |
| Date: | 2004-03-29 20:37:07 |
| Message-ID: | 200403292037.i2TKb7q13536@candle.pha.pa.us |
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| Lists: | pgsql-hackers pgsql-patches |
Karel Zak wrote:
> On Fri, Dec 19, 2003 at 01:12:08AM -0800, Dann Corbit wrote:
> > There is no zero calendar year. The first year of Anno Domini is 1. It's ordinal, not cardinal.
>
> I agree. But the follow quoted code is not use in date_part() there
> Kurt found bug. It's used in to_timestamp() _only_, and it works,
> because tm2timestamp() and date2j() work with zero year.
I have also add a doc mention to my patch that mentions that there is no
0 AD, and therefore subtraction of BC years from AD years must be done
with caution.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
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