If Arrow had a decimal64 type, someone could choose to use that for a PostgreSQL money column knowing that there are edge cases where they may get an undesired result.
On Thu, Nov 9, 2023 at 8:42 AM Antoine Pitrou <anto...@python.org> wrote: > > Le 09/11/2023 à 17:23, Curt Hagenlocher a écrit : > > Or more succinctly, > > "111,111,111,111,111.1111" will fit into a decimal64; would you prevent > it > > from being stored in one so that you can describe the column as > > "decimal(18, 4)"? > > That's what we do for other decimal types, see PyArrow below: > ``` > >>> pa.array([111_111_111_111_111_1111]).cast(pa.decimal128(18, 0)) > Traceback (most recent call last): > [...] > ArrowInvalid: Precision is not great enough for the result. It should be > at least 19 > ``` > >
