On Mon, 22 Nov 2004, David Schweikert wrote:
> On Sun, Nov 21, 2004 at 20:10:08 -0500, Tom Lane wrote:
> > I'm not entirely convinced this is a bug. I get the right answer from
> > regression=# select to_number('001,000', '999,999') ;
> > to_number
> > -----------
> > 1000
> > (1 row)
> > It's arguable that to_number() should throw an error when the input
> > doesn't match the format, but right now it doesn't ...
> It seems strange to me that to_char(1000,'999,999') works (it returns
> 1,000), but the reverse doesn't.
> I want to convert a formatted number with group separators, but I don't
> know how many digits it has: should I count the digits myself and adapt
> the mask (which is a customization and thus entered by the user)?
No, but I think you're supposed to use FM in such cases.
select to_number(1000, 'FM999,999');
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