comphead opened a new issue, #17453: URL: https://github.com/apache/datafusion/issues/17453
### Is your feature request related to a problem or challenge? DF and DuckDB returns different nullability flag for `map_keys` which makes some challenges comparing arrays later like in https://github.com/apache/datafusion-comet/issues/2321 DF (internal array flag is false ) ``` > select arrow_typeof(map_keys(map(['a'], [1]))); +------------------------------------------------------------------------------------------------------------------+ | arrow_typeof(map_keys(map(make_array(Utf8("a")),make_array(Int64(1))))) | +------------------------------------------------------------------------------------------------------------------+ | List(Field { name: "item", data_type: Utf8, nullable: false, dict_id: 0, dict_is_ordered: false, metadata: {} }) | +------------------------------------------------------------------------------------------------------------------+ ``` DuckDB (internal array flag is true) ``` D describe SELECT map_keys(map(['a'], [1])); ┌───────────────────────────────────────────────────────────┬─────────────┬─────────┬─────────┬─────────┬─────────┐ │ column_name │ column_type │ null │ key │ default │ extra │ │ varchar │ varchar │ varchar │ varchar │ varchar │ varchar │ ├───────────────────────────────────────────────────────────┼─────────────┼─────────┼─────────┼─────────┼─────────┤ │ map_keys("map"(main.list_value('a'), main.list_value(1))) │ VARCHAR[] │ YES │ │ │ │ └───────────────────────────────────────────────────────────┴─────────────┴─────────┴─────────┴─────────┴─────────┘ ``` ### Describe the solution you'd like _No response_ ### Describe alternatives you've considered _No response_ ### Additional context _No response_ -- 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: github-unsubscr...@datafusion.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: github-unsubscr...@datafusion.apache.org For additional commands, e-mail: github-h...@datafusion.apache.org
