Weston Pace created ARROW-13876: ----------------------------------- Summary: [C++] Uniform null handling in compute functions Key: ARROW-13876 URL: https://issues.apache.org/jira/browse/ARROW-13876 Project: Apache Arrow Issue Type: Bug Components: C++ Reporter: Weston Pace
The compute functions today have mixed support for null types. Unary arithmetic functions (e.g. abs) don't support null arrays Binary arithmetic functions (e.g. add) support one null array (e.g. int32 + null) but not both null arrays (i.e. null + null) but they do support both values being null (e.g. [null] + [null] = [null] if dtype=int32 but not supported if dtype=null) Some functions do forward null arrays: - unique Some functions output a non-null type given null inputs - is_null (=> boolean) - is_valid (=> boolean) - value_counts (=> struct) - dictionary_encode (=> dictionary<null>) - count (=> int64) Some functions throw an error other than "not implemented" - list_parent_indices -- This message was sent by Atlassian Jira (v8.3.4#803005)