[GENERAL] 8.3: timestamp subtraction

[Havasvölgyi Ottó]

Hi,

I don't know why this query returns false:

SELECT '20040506 070809.010000'::timestamp(6) - '20010203
040506.007000'::timestamp(6) = '1188 day 3 hour 3 minute 3 second 3
millisecond'::interval;
If I just subtract the two timestamps, its result is the interval I
specified.

What may cause this?

Thanks,
Otto