RAPIDS/libcudf would definitely support this. For what it's worth, libcudf's fixed_point decimal type implementation is standalone and could easily be extracted/reused: https://github.com/rapidsai/cudf/blob/branch-22.04/cpp/include/cudf/fixed_point/fixed_point.hpp
We even had a recent blog that describes our fixed_point type implementation and usage: https://developer.nvidia.com/blog/implementing-high-precision-decimal-arithmetic-with-cuda-int128/ On 2022/03/03 17:05:36 Micah Kornfield wrote: > I think this makes sense to add these. Typically when adding new types, > we've waited on the official vote until there are two reference > implementations demonstrating compatibility. > > On Thu, Mar 3, 2022 at 6:55 AM Antoine Pitrou <an...@python.org> wrote: > > > > > Hello, > > > > Currently, the Arrow format specification restricts the bitwidth of > > decimal numbers to either 128 or 256 bits. > > > > However, there is interest in allowing other bitwidths, at least 32 and > > 64 bits for this proposal. A 64-bit (respectively 32-bit) decimal > > datatype would allow for precisions of up to 18 digits (respectively 9 > > digits), which are sufficient for some applications which are mainly > > looking for exact computations rather than sheer precision. Obviously, > > smaller datatypes are cheaper to store in memory and cheaper to run > > computations on. > > > > For example, the Spark documentation mentions that some decimal types > > may fit in a Java int (32 bits) or long (64 bits): > > > > https://spark.apache.org/docs/latest/api/java/org/apache/spark/sql/types/DecimalType.html > > > > ... and a draft PR had even been filed for initial support in the C++ > > implementation (https://github.com/apache/arrow/pull/8578). > > > > I am therefore proposing that we relax the wording in the Arrow format > > specification to also allow 32- and 64-bit decimal types. > > > > This is a preliminary discussion to gather opinions and potential > > counter-arguments against this proposal. If no strong counter-argument > > emerges, we will probably run a vote in a week or two. > > > > Best regards > > > > Antoine. > > >
