jorgecarleitao commented on pull request #9331: URL: https://github.com/apache/arrow/pull/9331#issuecomment-768803567
Thanks a lot for digging into it, @maxburke . fyi, there is no need to share the data. For this exercise we only need: * the input schema * the SQL statement * the column name where that appeared The invariant is: > the downcast of `&dyn Array` to a concrete type `T: Array` is infalible iff `T` is the corresponding `struct` for the `DataType` of the associated `Field`. For example, ```rust let field = record_batch.schema().field(0); let array = record_batch.column(0); let meta_is_string = field.data_type() == DataType::Utf8; let data_is_string = array.as_any().downcast_ref::<StringArray>().is_some(); assert_eq!(meta_is_string, data_is_string) ``` and the above holds for every pair `(DataType, T: Array)`. ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: [email protected]
