Jeff Davis <pgsql@j-davis.com> wrote:
> I saw some strange results:
>
> postgres=# select '1.1'::numeric = '1.1'::float8;
> ?column?
> ----------
> t
> (1 row)
>
> postgres=# select '1.1'::numeric = '1.1'::float4;
> ?column?
> ----------
> f
> (1 row)
The part I find strange is that the first one evaluates to true,
since numeric can exactly represent 1.1 and float8 cannot. It also
seems inconsistent with this:
test=# set extra_float_digits = 3;
SET
test=# select '1.1'::float4;
float4
------------
1.10000002
(1 row)
test=# select '1.1'::float8;
float8
---------------------
1.10000000000000009
(1 row)
--
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
