Re: Why length(to_char(1::integer, '9')) = 2 ?

On Wednesday, March 09, 2011 5:34:41 am Dmitriy Igrishin wrote:

>
> But I am missing something or there is a documentation inaccuracy:
> http://www.postgresql.org/docs/9.0/static/functions-formatting.html#FUNCTIO
> NS-FORMATTING-NUMERICMOD-TABLEsays: fill mode (suppress padding blanks and
> zeroes)
>
> Test:
> dmitigr=> select to_char(12,'FM0009');
> to_char
> ---------
> 0012
>
> dmitigr=> select length(to_char(12,'FM0009'));
> length
> --------
> 4
>
> So, FM suppresses only padding blanks not zeroes...
>
> Any comments?
>

test(5432)aklaver=>select to_char(12,'9999');
to_char
---------
12

test(5432)aklaver=>select to_char(12,'FM9999');
to_char
---------
12

It is a little confusing, but you asked for the 0 in your specification so they
are not considered padding.

Look at the examples in the table listed below to get an idea of what I am
talking about.
http://www.postgresql.org/docs/9.0/static/functions-formatting.html
Table 9-25

--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com