Method error_or

datafusion/common/src/error.rs:743–749

Returns `Ok(ok)` if no errors were added to the builder, otherwise returns a `Result::Err`

(self, ok: T)

    /// Returns `Ok(ok)` if no errors were added to the builder,
    /// otherwise returns a `Result::Err`
    pub fn error_or<T>(self, ok: T) -> Result<T, DataFusionError> {
        match self.0.len() {
            0 => Ok(ok),
            1 => Err(self.0.into_iter().next().expect("length matched 1")),
            _ => Err(DataFusionError::Collection(self.0)),
        }
    }
}

/// Unwrap an `Option` if possible. Otherwise return an `DataFusionError::Internal`.