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

[Dmitriy Igrishin <dmitigr@xxxxxxxxx>]

2011/3/9 Adrian Klaver <adrian.klaver@xxxxxxxxx>

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');
> Âto_char
> ---------
> Â0012
>
> dmitigr=> select length(to_char(12,'FM0009'));
> Âlength
> --------
> Â Â Â 4
>
> So, FM suppresses only padding blanks not zeroes...
>
> Any comments?
>

test(5432)aklaver=>select to_char(12,'9999');
Âto_char
---------
 Â12

test(5432)aklaver=>select to_char(12,'FM9999');
Âto_char
---------
Â12

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

Yes, I see, thanks!

I just talking about phrase "fill mode (suppress padding blanks and zeroes)"
in the documentation should be rephrased to "fill mode (suppress padding
blanks)".

Or I misunderstood what is "padding zeroes" without explicitly
specification "0" pattern in the format format template...

--
Adrian Klaver
adrian.klaver@xxxxxxxxx

-- 
// Dmitriy.