Re: [RFC] allow 'semester' in functions EXTRACT, DATE_PART, TO_CHAR and so on.

On Fri, Aug 14, 2015 at 10:06:22PM -0300, Dickson S. Guedes wrote:
> 2015-08-14 21:32 GMT-03:00 Gavin Flower <GavinFlower@archidevsys.co.nz>:
> ...
> > So semesters don't appear to align with normal half year boundaries.
> 
> Interesting links, thanks!
> 
> Which sounds better for a native English: 'half', 'halfyear'?
> 
> For example:
> 
> > SELECT date_trunc('halfyear', current_date);
>        date_trunc
> ------------------------
>  2015-07-01 00:00:00-03
> (1 row)
> 
> Thanks!

As with, "quarter," we need to be careful about which type of "half"
we are defining.  For some financial calculations, a "month" is always
30 days, a "quarter," always three "months," i.e. 90 days, and a
"half" is six "months," or 180 days.

Yes, date math is crazy, and yes, we have to deal with it as it
exists.

Cheers,
David.
-- 
David Fetter <david@fetter.org> http://fetter.org/
Phone: +1 415 235 3778  AIM: dfetter666  Yahoo!: dfetter
Skype: davidfetter      XMPP: david.fetter@gmail.com

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