Method find_columns

datafusion/core/src/dataframe/mod.rs:2498–2509

Helper to find columns from names

(&self, names: &[String])

    // Helper to find columns from names
    fn find_columns(&self, names: &[String]) -> Result<Vec<FieldRef>> {
        let schema = self.logical_plan().schema();
        names
            .iter()
            .map(|name| {
                schema
                    .field_with_name(None, name)
                    .cloned()
                    .map_err(|_| plan_datafusion_err!("Column '{}' not found", name))
            })
            .collect()
    }

    /// Find qualified columns for this dataframe from names
    ///