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

2011/3/9 Dmitriy Igrishin <dmitigr(at)gmail(dot)com>:
>
>
> 2011/3/9 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
>>
>> 2011/3/9 Dmitriy Igrishin <dmitigr(at)gmail(dot)com>:
>> > Hey all,
>> >
>> > dmitigr=> select to_char(1, '9');
>> >  to_char
>> > ---------
>> >   1
>> >
>> > dmitigr=> select length(to_char(1, '9'));
>> >  length
>> > --------
>> >       2
>> >
>> > Why to_char() includes preceding blank space in the result ?
>>
>> it is compatibility with Oracle?
>
> Do you mean the case of MI ?
> So, is this leading space reserved for a sign of number by default ?

yes

pavel=# select '>' || to_char(-1,'9') || '<';
?column?
──────────
>-1<
(1 row)

regards

Pavel

>>
>> Regards
>>
>> Pavel
>>
>> >
>> > --
>> > // Dmitriy.
>> >
>> >
>> >
>
>
>
> --
> // Dmitriy.
>
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>