Обсуждение: FM suffix in to_char Y/YY/YYY still screwy

I thought we'd fixed this ...

regression=# select to_char('2009-01-01'::date, 'YY');to_char 
---------09
(1 row)

regression=# select to_char('2009-01-01'::date, 'FMYY');to_char 
---------09
(1 row)

Not a lot of zero suppression happening there :-(.

I believe the correct fix is to reduce the year mod 100 (or 10 or 1000)
before feeding it to snprintf, rather than playing games with printing
only part of the result string as the original and current code try to
do.
        regards, tom lane

On 8 April 2010 06:46, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Not a lot of zero suppression happening there :-(.
>
> I believe the correct fix is to reduce the year mod 100 (or 10 or 1000)
> before feeding it to snprintf, rather than playing games with printing
> only part of the result string as the original and current code try to
> do.

I think you're right.  FM should behave as advertised, even for years.

Cheers,
BJ

Tom Lane wrote:
> I thought we'd fixed this ...
> 
> regression=# select to_char('2009-01-01'::date, 'YY');
>  to_char 
> ---------
>  09
> (1 row)
> 
> regression=# select to_char('2009-01-01'::date, 'FMYY');
>  to_char 
> ---------
>  09
> (1 row)
> 
> Not a lot of zero suppression happening there :-(.
> 
> I believe the correct fix is to reduce the year mod 100 (or 10 or 1000)
> before feeding it to snprintf, rather than playing games with printing
> only part of the result string as the original and current code try to
> do.

Agreed.  Thanks for the fix.

--  Bruce Momjian  <bruce@momjian.us>        http://momjian.us EnterpriseDB
http://enterprisedb.com