[jira] [Created] (ARROW-14004) to_pandas() converts to float instead of using pandas nullable types

["Miguel Cantón Cortés (Jira)" <ji...@apache.org>]

Miguel Cantón Cortés created ARROW-14004:
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             Summary: to_pandas() converts to float instead of using pandas nullable types
                 Key: ARROW-14004
                 URL: https://issues.apache.org/jira/browse/ARROW-14004
             Project: Apache Arrow
          Issue Type: Bug
            Reporter: Miguel Cantón Cortés
         Attachments: image.png

We've noticed that when converting an Arrow Table to pandas using `.to_pandas()` integer columns with null values get converted to float instead of using pandas nullable types.

If the column was created with pandas first it is correctly preserved (I guess it's using stored metadata for this).

As currently there is support for nullable types in pandas, just as in Arrow, it would be great to use these types when dealing with columns with null values.

If you are reticent to change this behavior, a param would be nice too (e.g. `to_pandas(use_nullable_types: True)`).

 



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