amoeba commented on issue #45935: URL: https://github.com/apache/arrow/issues/45935#issuecomment-2770897719
> could it be that accidentaly this column is saved as string for some symbols so it "doesn't know" how to import it as double? That's a pretty reasonable guess. `open_dataset` determines the schema from the first file it discovers so if the files don't all have the same schemas, you can run into behavior like this. A quick way to check would be to use the `unify_schemas` argument to `open_dataset` (See `?open_dataset). I'm guessing that schema will be different when you set unify_schemas to TRUE. -- 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]
