>> Yeah if OP wants exact numbers he needs to use numeric type.
I see, numeric is the type. Not sure why documentation mentions decimal, yet in phpPgAdmin it doesn’t provide decimal as an option for type.
I'm not personally against the policy of choosing one item out of set of aliases. My perception is that numeric is by far the more common choice of the two SQL standard arbitrary precision numbers. Given people multiple options just begs them to ponder how they might be different.