ray.data.datasource.FileBasedDatasource.get_column_renames

FileBasedDatasource.get_column_renames() → Dict[str, str] | None

Return the column renames from the projection map.

This is used by predicate pushdown to rewrite filter expressions from renamed column names back to original column names.

Returns:

Dict mapping original column names to renamed names, or None if no renaming has been applied.