Function try_to_scalar

datafusion/spark/src/function/string/format_string.rs:194–199

(arg: ColumnarValue, index: usize)

}

fn try_to_scalar(arg: ColumnarValue, index: usize) -> Result<ScalarValue> {
    match arg {
        ColumnarValue::Scalar(scalar) => Ok(scalar),
        ColumnarValue::Array(array) => ScalarValue::try_from_array(&array, index),
    }
}

/// Compatible with `java.util.Formatter`
#[derive(Debug)]