Re: [HACKERS] 123.45 - 123 = 0.45

> Hi all,
>
> I tried to divide 123.45 by 123.00 but PostgreSQL gives me a wrong
> result:
>
> hygea=> select 123.45 - 123.00;
> ?column?
> -----------------
> 0.450000000000003
> (1 row)
>

Wow, I get the same thing here.

Even this doesn't work:

test=> select float8(123.45) - float8(123.00);
?column?
-----------------
0.450000000000003
(1 row)

Now constants are automatically promoted to float8, so I expected the
same results, but what is going on here?

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