From: | "Dickson S(dot) Guedes" <listas(at)guedesoft(dot)net> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, pg-dev <pgsql-hackers(at)postgresql(dot)org>, Robert Haas <robertmhaas(at)gmail(dot)com> |
Subject: | Re: [RFC] allow 'semester' in functions EXTRACT, DATE_PART, TO_CHAR and so on. |
Date: | 2015-08-15 04:48:46 |
Message-ID: | CAHHcrep2DLJhD4U+588qz=cdZVP10UDVg+zYRFW5ko0hd_2tHA@mail.gmail.com |
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2015-08-15 0:55 GMT-03:00 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
> I don't think we should accept a patch along this line, because it assigns
> a very specific meaning to "semester" that does not square all that well
> with real-world usage.
I agree that "semester" was not nice, the real meaning is "half" or
"halfyear" as mentioned in other messages. That's it, I was proposing
the extraction of the first or second half year using a specific word
like in:
select extract('halfyear' from date '2015-08-15')); or
select date_trunc('halfyear', date '2015-08-15');
rather than trying to overloading `date_part` with a UDF or
calculating half like:
select ceil(date_part('quarter', date '2015-08-15') / 2);
BTW, I feel that I have enough feedback to set patch as rejected.
Thank you for your time.
--
Dickson S. Guedes
mail/xmpp: guedes(at)guedesoft(dot)net - skype: guediz
http://github.com/guedes - http://guedesoft.net
http://www.postgresql.org.br
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