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> * Prevent to_char() on interval from returning meaningless values
>
>   For example, to_char('1 month', 'mon') is meaningless.  Basically,
>   most date-related parameters to to_char() are meaningless for
>   intervals because interval is not anchored to a date.
>
> * Allow to_char() on interval values to accumulate the highest unit
>   requested
>
> 	o to_char(INTERVAL '1 hour 5 minutes', 'MI') => 65
> 	o to_char(INTERVAL '43 hours 20 minutes', 'MI' ) => 2600
> 	o to_char(INTERVAL '43 hours 20 minutes', 'WK:DD:HR:MI') => 0:1:19:20
> 	o to_char(INTERVAL '3 years 5 months','MM') => 41
>
>   Some special format flag would be required to request such
>   accumulation.  Such functionality could also be added to EXTRACT.
>   Prevent accumulation that crosses the month/day boundary because of
>   the uneven number of days in a month.
>
This commit is contained in:
Bruce Momjian
2005-05-07 04:24:34 +00:00
parent b63990c6a8
commit 5894e7e36e
2 changed files with 42 additions and 3 deletions
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21
doc/TODO
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@ -2,7 +2,7 @@
PostgreSQL TODO List
====================
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
Last updated: Mon May 2 14:27:06 EDT 2005
Last updated: Sat May 7 00:24:29 EDT 2005
The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html.
@ -188,6 +188,25 @@ Data Types
zero the bits
* Prevent INET cast to CIDR from droping netmask, SELECT '1.1.1.1'::inet::cidr
* Add 'tid != tid ' operator for use in corruption recovery
* Prevent to_char() on interval from returning meaningless values
For example, to_char('1 month', 'mon') is meaningless. Basically,
most date-related parameters to to_char() are meaningless for
intervals because interval is not anchored to a date.
* Allow to_char() on interval values to accumulate the highest unit
requested
o to_char(INTERVAL '1 hour 5 minutes', 'MI') => 65
o to_char(INTERVAL '43 hours 20 minutes', 'MI' ) => 2600
o to_char(INTERVAL '43 hours 20 minutes', 'WK:DD:HR:MI') => 0:1:19:20
o to_char(INTERVAL '3 years 5 months','MM') => 41
Some special format flag would be required to request such
accumulation. Such functionality could also be added to EXTRACT.
Prevent accumulation that crosses the month/day boundary because of
the uneven number of days in a month.
* Add ISO INTERVAL handling
o Add support for day-time syntax, INTERVAL '1 2:03:04' DAY TO SECOND
o Add support for year-month syntax, INTERVAL '50-6' YEAR TO MONTH