icexelloss opened a new issue, #34520: URL: https://github.com/apache/arrow/issues/34520
### Describe the bug, including details regarding any error messages, version, and platform. I used this test to invoke a UDF via substrait that inputs and outputs "timestamp": https://github.com/icexelloss/arrow/blob/pyarrow-udf-timestamp-type/python/pyarrow/tests/test_substrait.py#L449 And hit with this error: ``` > raise ArrowNotImplementedError(message) E pyarrow.lib.ArrowNotImplementedError: Function 'y=ceil(x)' has no kernel matching input types (timestamp[us, tz=UTC]) E /home/icexelloss/workspace/arrow/cpp/src/arrow/compute/exec/expression.cc:548 call.function->DispatchBest(&types) E /home/icexelloss/workspace/arrow/cpp/src/arrow/engine/substrait/relation_internal.cc:550 des_expr.Bind(*input.output_schema) E /home/icexelloss/workspace/arrow/cpp/src/arrow/engine/substrait/serde.cc:212 FromProto(root_rel.has_root() ? root_rel.root().input() : root_rel.rel(), ext_set, conversion_options) E /home/icexelloss/workspace/arrow/cpp/src/arrow/engine/substrait/util.cc:48 DeserializePlan(substrait_buffer, registry, nullptr, conversion_options) ``` After some debugging, I found this ultimately hit this comparison (between the input data type declared by the kernel and the data type of the actual input) and failed: https://github.com/icexelloss/arrow/blob/pyarrow-udf-timestamp-type/cpp/src/arrow/compare.cc#L1375 I printed the `left_fp` and `right_fp` values in the debugger, they are different, but I cannot make sense of what they mean: ``` print left_fp (const std::basic_string<char, std::char_traits<char>, std::allocator<> >) $3 = { _M_dataplus = (_M_p = "@Sn3:UTC") _M_string_length = 8 = (_M_local_buf = "@Sn3:UTC\0\xd1LwkU", _M_allocated_capacity = 4851596407044199232) } print right_fp (const std::basic_string<char, std::char_traits<char>, std::allocator<> >) $4 = { _M_dataplus = (_M_p = "@Su3:UTC") _M_string_length = 8 = (_M_local_buf = "@Su3:UTC\0\"\xb3wkU", _M_allocated_capacity = 4851596407044657984) } ``` ### Component(s) C++ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
