Re: Zero copy cast kernels

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:

Re: Zero copy cast kernels

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

Zero copy cast kernels

Hello, I recently found myself casting an int64 (nanos from epoch) into a nano timestamp column with the C++ cast kernel (via Acero). I expect this to be zero copy but I wonder if there is a way to check which casts are zero copy and which are not? Li