Обсуждение: to_char() and order-by

Perhaps this was covered in the 7.2.x release notes, but it's mystifying us:

select to_char(time_link,'999.99') from stat_fetch
where time_link is not null
order by 1 desc limit 10;

(time_link is a double-precision column.)  Under 7.1.3, this returns results like:
to_char 
---------   9.99   9.99   9.99   9.99   9.99   9.99   9.99   9.99   9.99   9.99
(10 rows)

while under 7.2.1, you get the top 10 rows in *numerical* order:
to_char 
--------- 278.78 261.07 240.25 180.24 173.26 160.35 159.02 144.57 134.21 131.66
(10 rows)

On Thu, Jun 27, 2002 at 12:27:11PM -0700, Jeff Boes wrote:
> Perhaps this was covered in the 7.2.x release notes, but it's mystifying us:
Please, how are data without to_char()? select time_link from stat_fetch where time_link is not null order by 1 desc
limit10;
 
   Karel

> select to_char(time_link,'999.99') from stat_fetch
> where time_link is not null
> order by 1 desc limit 10;
> 
> (time_link is a double-precision column.)  Under 7.1.3, this returns results like:
> 
>  to_char 
> ---------
>     9.99
>     9.99
>     9.99
>     9.99
>     9.99
>     9.99
>     9.99
>     9.99
>     9.99
>     9.99
> (10 rows)
> 
> while under 7.2.1, you get the top 10 rows in *numerical* order:
> 
>  to_char 
> ---------
>   278.78
>   261.07
>   240.25
>   180.24
>   173.26
>   160.35
>   159.02
>   144.57
>   134.21
>   131.66
> (10 rows)

-- Karel Zak  <zakkr@zf.jcu.cz>http://home.zf.jcu.cz/~zakkr/C, PostgreSQL, PHP, WWW, http://docs.linux.cz,
http://mape.jcu.cz

On Fri, 2002-06-28 at 03:59, Karel Zak wrote:
> On Thu, Jun 27, 2002 at 12:27:11PM -0700, Jeff Boes wrote:
> > Perhaps this was covered in the 7.2.x release notes, but it's mystifying us:
> 
>  Please, how are data without to_char()? 
>  
>  select time_link from stat_fetch 
>  where time_link is not null 
>  order by 1 desc limit 10;
> 

A sample:
  time_link     
------------------113.532913923264105.676617980003
96.57536494731996.368474006652895.364526033401584.648793935775883.975933909416278.259557962417678.0376229286194
76.875627040863
(10 rows)



-- 
Jeff Boes                                      vox 616.226.9550 ext 24
Database Engineer                                     fax 616.349.9076
Nexcerpt, Inc.                                 http://www.nexcerpt.com          ...Nexcerpt... Extend your Expertise