Thanks Rok! Original question is to asking for a way to "verify if a cast if zero copy by read source code / documentation", and not "verify a cast if zero copy programmatically" but I noticed by reading the test file that int64 to micro is indeed zero copy and I expect nanos to be the same https://github.com/apache/arrow/blob/e7d6c13d4ae3d8df0e9b668468b990f35c8a9556/cpp/src/arrow/compute/kernels/scalar_cast_test.cc#L1546
On Fri, Mar 24, 2023 at 12:36 PM Rok Mihevc <rok.mih...@gmail.com> wrote: > For scalar casting tests we use CheckCastZeroCopy [1] which you could > reuse. > > [1] > > https://github.com/apache/arrow/blob/e7d6c13d4ae3d8df0e9b668468b990f35c8a9556/cpp/src/arrow/compute/kernels/scalar_cast_test.cc#L128-L138 > > Rok >
