Re: Postgres 9.2.4 "Double Precision" Precision

On 09/14/2013 08:51 AM, Kevin Grittner wrote:
> Adrian Klaver <adrian.klaver@gmail.com> wrote:
>
>> create table float_test (id int, f_fld double precision);
>> insert into  float_test values (1, 6.31);
>> insert into  float_test values (2, 6.32);
>> select * from float_test ;
>>
>>     id | f_fld
>> ----+-------
>>     1 |  6.31
>>     2 |  6.32
>> (2 rows)
>
> If, instead of those inserts I use these:
>
> insert into  float_test values (1, '6.31');
> insert into  float_test values (1, '6.32');
> insert into  float_test values (1, '6.32'::double precision);
> insert into  float_test values (1, '6.32'::real);
>
> I get:
>
>   id |      f_fld
> ----+------------------
>    1 |             6.31
>    1 |             6.32
>    1 |             6.32
>    1 | 6.32000017166138
> (4 rows)
>
> Apparently the value is being treated as a real value somewhere.

Interesting, more grist for the mill.

>
> --
> Kevin Grittner
> EDB: http://www.enterprisedb.com
> The Enterprise PostgreSQL Company
>
>


--
Adrian Klaver
adrian.klaver@gmail.com