tustvold opened a new issue, #2664: URL: https://github.com/apache/arrow-rs/issues/2664
**Which part is this question about** <!-- Is it code base, library api, documentation or some other part? --> The implementation for unary_dyn currently iterates the dictionary keys, looking up the corresponding value for each non-null key, and storing the result in a PrimitiveArray. Aside from being grossly inefficient, it seems counter-intuitive at least to me that calling dyn_unary would change the type of the array. **Describe your question** <!-- A clear and concise description of what the question is. --> Should this kernel instead just apply the unary operation to the dictionary values, leaving the keys unchanged? **Additional context** <!-- Add any other context about the problem here. --> Tagging @viirya @sunchao who implemented and reviewed this implementation initially in https://github.com/apache/arrow-rs/pull/1990 -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
