Subject: Re: [GENERAL] fomatting an interval
From: Joseph Shraibman <[email-masked]>
To: Tom Lane <[email-masked]>
Cc: [email-masked], PostgreSQL General <[email-masked]>
Date: Mon, 12 May 2003 21:45:33 -0400

Tom Lane wrote:
>>>>How can I format an interval?
> 
> 
> Well, there are several possibilities such as to_char() and EXTRACT()
> ...
> 
Right, except I don't know what format to use for to_char()

> 
>>I want something like the default format but without the milliseconds.
> 
> 
> ... but for this particular problem, why not just round the given
> interval to an integral number of seconds, by casting it to interval(0)?
> 

playpen=# select version();
                                version
---------------------------------------------------------------------
  PostgreSQL 7.3.2 on i686-pc-linux-gnu, compiled by GCC egcs-2.91.66
(1 row)

playpen=# begin;
BEGIN
playpen=# create table timetable (start timestamp, finish timestamp);
CREATE TABLE
playpen=# insert into timetable values('2003-05-12 21:37:44.933',  '2003-05-12 21:39:14.752');
INSERT 1648889 1
playpen=# select start, finish, (finish-start),(finish-start)::interval(0) from timetable;
           start          |         finish          |   ?column?   |   interval
-------------------------+-------------------------+--------------+--------------
  2003-05-12 21:37:44.933 | 2003-05-12 21:39:14.752 | 00:01:29.819 | 00:01:29.819
(1 row)