Re: [HACKERS] Re: [HACKERS] Re: [HACKERS] Re: [HACKERS] Is it necessary to rewrite table while increasing the scale of datatype numeric？

On Fri, Sep 6, 2013 at 2:34 PM, Hannu Krosing <hannu@2ndquadrant.com> wrote:
> On 09/06/2013 07:57 PM, Robert Haas wrote:
>> On Fri, Sep 6, 2013 at 12:34 PM, Greg Stark <stark@mit.edu> wrote:
>>> But I wonder if we could just declare that that's not what the scale typmod
>>> does. That it's just a maximum scale but it's perfectly valid for NUMERIC
>>> data with lower scales to be stored in a column than the typmod says. In a
>>> way the current behaviour is like bpchar but it would be nice if it was more
>>> like varchar
>> Sure, but the point is that 5.0000 is not the same as 5.000 today.  If
>> you start whacking this around you'll be changing that behavior, I
>> think.
>>
> So we already get it wrong by rewriting ?

Ah, no, I don't think so.  If you have 5.00000000000000000 and lower
the scale, it'll truncate off some of those zeroes to make it fit.

--
Robert Haas
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