findepi opened a new issue, #13757: URL: https://github.com/apache/datafusion/issues/13757
### Describe the bug per https://github.com/apache/datafusion/pull/13706 the list functions are modeled after DuckDB[^1] per https://duckdb.org/docs/sql/functions/list.html#flattenlist_of_lists, `flatten` should flatten one level, not recursive [^1]: i would prefer a more established point of reference with close alignment to the SQL standard, but this issue is not about this ### To Reproduce ``` query ??? select flatten(arrow_cast(make_array([[1.1]], [[2.2]], [[3.3], [4.4]]), 'LargeList(LargeList(LargeList(Float64)))')); ---- [1.1, 2.2, 3.3, 4.4] ``` ### Expected behavior ``` query ??? select flatten(arrow_cast(make_array([[1.1]], [[2.2]], [[3.3], [4.4]]), 'LargeList(LargeList(LargeList(Float64)))')); ---- [[1.1], [2.2], [3.3], [4.4]] ``` ### 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
