Interesting.  We should be able to handle a "" thousands separator.  In
fact, psql does, but to_char() does not.

Looking at to_char(), it seems that we should be able to handle "" for
thousands and plus sign.

I have applied the following patch for 8.2.  I have not applied to 8.1.X
because it is a behavior change.

Thanks for the report.

---------------------------------------------------------------------------

Daniel Verite wrote:
>       Peter Eisentraut wrote:
> 
> > St?phane SCHILDKNECHT wrote:
> > > select to_char(1485.12, '9G999D99');
> > 
> > > But, surprinsingly, I got 1,1485,12.
> > 
> > The fr_FR locale is broken.  You should report this to glibc.
> 
> On my debian sarge with LC_NUMERIC set to [EMAIL PROTECTED], a
>   printf("%'g\n", 1485.12);
> produces 1485,12 with which seems to be correct given that the
> 'thousands_sep' locale entry is set to "" (empty string) and
> 'decimal_point' to U002C
> 
> On the other hand, what postgres produces is:
> test=> set lc_numeric='[EMAIL PROTECTED]';
> SET
> test=> select to_char(1485.12, '9G999D99'); 
>   to_char  
> -----------
>   1,485,12
> (1 row)
> 
> which is wrong with regard to thousands_sep="".
> 
> In fact, grep'ing the source code reveals that, when 'thousands_sep' is set to
> an empty string, it gets ignored and a comma is used instead.
> I'm referring to backend/utils/adt/formatting.c, NUM_prepare_locale() in 
> 8.1.2:
> 
>   /*
>    * Number thousands separator
>    */
>   if (lconv->thousands_sep && *lconv->thousands_sep)
>           Np->L_thousands_sep = lconv->thousands_sep;
>   else
>           Np->L_thousands_sep = ",";
> 
> What's wrong with lconv->thousands_sep being set to an empty string?
> Shouldn't it be used nonetheless?
> 
> -- 
>  Daniel
>  PostgreSQL-powered mail user agent and storage: http://www.manitou-mail.org
> 
> 
> ---------------------------(end of broadcast)---------------------------
> TIP 9: In versions below 8.0, the planner will ignore your desire to
>        choose an index scan if your joining column's datatypes do not
>        match
> 

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073
Index: src/backend/utils/adt/formatting.c
===================================================================
RCS file: /cvsroot/pgsql/src/backend/utils/adt/formatting.c,v
retrieving revision 1.104
diff -c -c -r1.104 formatting.c
*** src/backend/utils/adt/formatting.c  12 Feb 2006 04:44:15 -0000      1.104
--- src/backend/utils/adt/formatting.c  12 Feb 2006 19:48:28 -0000
***************
*** 3720,3734 ****
                else
                        Np->L_negative_sign = "-";
  
!               if (lconv->positive_sign && *lconv->positive_sign)
                        Np->L_positive_sign = lconv->positive_sign;
                else
                        Np->L_positive_sign = "+";
  
                /*
!                * Number thousands separator
                 */
!               if (lconv->thousands_sep && *lconv->thousands_sep)
                        Np->L_thousands_sep = lconv->thousands_sep;
                else
                        Np->L_thousands_sep = ",";
--- 3720,3735 ----
                else
                        Np->L_negative_sign = "-";
  
!               /* Might be "" */
!               if (lconv->positive_sign)
                        Np->L_positive_sign = lconv->positive_sign;
                else
                        Np->L_positive_sign = "+";
  
                /*
!                * Number thousands separator (might be "")
                 */
!               if (lconv->thousands_sep)
                        Np->L_thousands_sep = lconv->thousands_sep;
                else
                        Np->L_thousands_sep = ",";
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